Vintage Oldsmobiles Curved Dash, Limited Touring, Models 40, 53, 66; Series 60, 70, 90

53 running badly.

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Old August 11th, 2016, 02:58 PM
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From what I understand he has a ballast resistor, not a resistance wire. The system instructions stated that it can be run with or without the voltage drop for the coil. Either way the red wire to the module needs a switched 12v source.
http://www.pertronix.com/support/man...itor12vneg.pdf
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Old August 11th, 2016, 05:48 PM
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I don't wish to discourage you, but in some previous post of yours ,you were concerned about your oil pressure showing very low when idling after motor warmed up,and I thought on one of your videos , that the lifters sounded louder than usual.If you have driven it very much with improper oil to the rocker arms and top of engine,a worn cam lobe, lifter, or pushrod , could easily be your problem. I sincerely hope not,but it is a possibility. Larry
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Old August 11th, 2016, 10:17 PM
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Originally Posted by Rocketowner
I don't wish to discourage you, but in some previous post of yours ,you were concerned about your oil pressure showing very low when idling after motor warmed up,and I thought on one of your videos , that the lifters sounded louder than usual.If you have driven it very much with improper oil to the rocker arms and top of engine,a worn cam lobe, lifter, or pushrod , could easily be your problem. I sincerely hope not,but it is a possibility. Larry
Nigel,


This is my fear as well. Coincidences do not really happen when trouble shooting engine problems.


1. The vale train looked dry, no oil
2. Noisy lifters
3. Ran ok for a while, then started missing.
4. Low oil pressure through out the engine.


A clue here is that no cylinder on the opposite side has misfired. If that were the case, good chance a cam lobe has been worn to the point a valve on #5 is not opening. But, this is not the case, so I would suspect a lifter problem itself, or a worn pushrod--if the spark is good.


This can't be good with little or no oil in the valve train. One simple thing to check, and takes little time. Drain the oil, and check the oil for metal particles. If you have a spin on oil filter adapter, change the filter and cut it apart, take the paper element apart, unfold it and look for flakes.


If no metal, that rules out a worn lifter. Metal, well now you have to figure out where from. Low oil pressure, could be main bearings, could be cam lobe.


Lots of trouble shooting to go before jumping to conclusions.
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Old August 12th, 2016, 04:43 AM
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Originally Posted by Rocketowner
I don't wish to discourage you, but in some previous post of yours ,you were concerned about your oil pressure showing very low when idling after motor warmed up,and I thought on one of your videos , that the lifters sounded louder than usual.If you have driven it very much with improper oil to the rocker arms and top of engine,a worn cam lobe, lifter, or pushrod , could easily be your problem. I sincerely hope not,but it is a possibility. Larry
I know Larry, this is a big worry, I was so keen to get out in my baby, but it may mean no more Olds till its had a bottom end rebuild.


Originally Posted by DFitz
Nigel,
This is my fear as well. Coincidences do not really happen when trouble shooting engine problems.


1. The vale train looked dry, no oil
2. Noisy lifters
3. Ran ok for a while, then started missing.
4. Low oil pressure through out the engine.


A clue here is that no cylinder on the opposite side has misfired. If that were the case, good chance a cam lobe has been worn to the point a valve on #5 is not opening. But, this is not the case, so I would suspect a lifter problem itself, or a worn pushrod--if the spark is good.


This can't be good with little or no oil in the valve train. One simple thing to check, and takes little time. Drain the oil, and check the oil for metal particles. If you have a spin on oil filter adapter, change the filter and cut it apart, take the paper element apart, unfold it and look for flakes.


If no metal, that rules out a worn lifter. Metal, well now you have to figure out where from. Low oil pressure, could be main bearings, could be cam lobe.


Lots of trouble shooting to go before jumping to conclusions.
I'm going to have a mini tear down to check those things my brother....I adore this car and want it right.
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Old August 12th, 2016, 08:43 AM
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Originally Posted by Eightbanger
I know Larry, this is a big worry, I was so keen to get out in my baby, but it may mean no more Olds till its had a bottom end rebuild.




I'm going to have a mini tear down to check those things my brother....I adore this car and want it right.
Nigel,


I know you've learned a lot on the car and I applaud your efforts. Knowledge is never a bad thing. With that in mind, I would encourage you to check to oil.


If you don't have that spin on filter, you can still do this. I don't know your expertise level, but here is how to do it:
1. Drain the oil normally
2. Let the pan with the oil sit for a while
3. pour the oil into whatever drum or can you would normally recycle/dispose of it
4. Don't clean out the pan you drained it from. In fact, leave a bit of oil in the bottom, so don't pour it all into the can
5. Then with either a very bright single point light, (Light bulb) or out in the bright sun, swirl the leftover oil around the bottom of the pan while looking for reflections and small particles.


If there is any metal, it will show up as flakes easily seen in the bottom. The color can help you isolate where it's from. See if it's magnetic, or not.


If there is no metal, then it's good news. It's a step to trouble shoot. If there is, then at least you are narrowing the troubleshooting tree. Now, small amounts of metal is normal. If it's a cornucopia of rainbow colors, which it would be if you have a cam problem, Bad news. But a small amount of flakes is ok. Once you've seen it you'll understand.


Good luck. Dave
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Old August 12th, 2016, 10:22 AM
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Nigel,you are to be admired for not getting completely disgusted! You have worked so hard and accomplished so much. Just think though,that each time you are "Banging your head", there is a dozen or more of us on C.O. Forum ,that are here "Banging ours also".I too am looking forward to us altogether finding the problem, and you be able to do some "Enjoyable Riding". Larry
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Old August 12th, 2016, 12:46 PM
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Originally Posted by DFitz
Nigel,


I know you've learned a lot on the car and I applaud your efforts. Knowledge is never a bad thing. With that in mind, I would encourage you to check to oil.


If you don't have that spin on filter, you can still do this. I don't know your expertise level, but here is how to do it:
1. Drain the oil normally
2. Let the pan with the oil sit for a while
3. pour the oil into whatever drum or can you would normally recycle/dispose of it
4. Don't clean out the pan you drained it from. In fact, leave a bit of oil in the bottom, so don't pour it all into the can
5. Then with either a very bright single point light, (Light bulb) or out in the bright sun, swirl the leftover oil around the bottom of the pan while looking for reflections and small particles.


If there is any metal, it will show up as flakes easily seen in the bottom. The color can help you isolate where it's from. See if it's magnetic, or not.


If there is no metal, then it's good news. It's a step to trouble shoot. If there is, then at least you are narrowing the troubleshooting tree. Now, small amounts of metal is normal. If it's a cornucopia of rainbow colors, which it would be if you have a cam problem, Bad news. But a small amount of flakes is ok. Once you've seen it you'll understand.


Good luck. Dave
Thank you Dave, I'll do as you suggest, but for now going to have a look at the top end, hopefully it will be nice and oily.

Originally Posted by Rocketowner
Nigel,you are to be admired for not getting completely disgusted! You have worked so hard and accomplished so much. Just think though,that each time you are "Banging your head", there is a dozen or more of us on C.O. Forum ,that are here "Banging ours also".I too am looking forward to us altogether finding the problem, and you be able to do some "Enjoyable Riding". Larry
Thank you Larry for the words of encouragement.


Well here are the next video instalments..lol

VT looks OK, and thankfully the valley shows evidence of plenty of oil sloshing around, but I am suspicious of the lifters so ordering a new set and push rods too....I should have done that in the beginning.


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Old August 12th, 2016, 01:02 PM
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It looks like your exhaust valve is having issues on that cylinder. But my screen is small.
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Old August 12th, 2016, 01:02 PM
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Hi Nigel.

I must say, you're doing a hell of a job. I don't think I would have taken off the intake (again) yet, but it's good that you did. When all of this is finally sorted, I suspect it would be wise to do something very nice for the Missus, as it seems to me she's been very kind about all of this.

Everything looks appropriately oiled to me, but, of course, the First Generation Olds guys will need to confirm that what you've got is normal for that engine.

What I could see of your cam looked good.

Your valves all seemed to be moving the same amount, which would indicate your cam lobes are good, and, regardless, they were moving enough for that cylinder to fire.

I agree that you seemed to have no decrease in speed when removing either #5 or #7 plug wire -- Next Test: Remove both wires and see if the speed changes. If not, you've confirmed that the problem lies in both cylinders.

I do not see a need for new pushrods at this time.

Also, it would be great to see a photo of all of your spark plugs lined up facing each other, as they are when installed, to see what, if any, differences they show.

So far, so good, and I think you've close to ruled out any serious internal mechanical problems.

- Eric
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Old August 12th, 2016, 01:22 PM
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Originally Posted by oldcutlass
It looks like your exhaust valve is having issues on that cylinder. But my screen is small.
What did you Eric that makes you think that...to my untrained eye they look like they're all moving as they should.

Originally Posted by MDchanic
Hi Nigel.

I must say, you're doing a hell of a job. I don't think I would have taken off the intake (again) yet, but it's good that you did. When all of this is finally sorted, I suspect it would be wise to do something very nice for the Missus, as it seems to me she's been very kind about all of this.

Everything looks appropriately oiled to me, but, of course, the First Generation Olds guys will need to confirm that what you've got is normal for that engine.

What I could see of your cam looked good.

Your valves all seemed to be moving the same amount, which would indicate your cam lobes are good, and, regardless, they were moving enough for that cylinder to fire.

I agree that you seemed to have no decrease in speed when removing either #5 or #7 plug wire -- Next Test: Remove both wires and see if the speed changes. If not, you've confirmed that the problem lies in both cylinders.

I do not see a need for new pushrods at this time.

Also, it would be great to see a photo of all of your spark plugs lined up facing each other, as they are when installed, to see what, if any, differences they show.

So far, so good, and I think you've close to ruled out any serious internal mechanical problems.

- Eric
Cheers for the kind words Eric, you're right mate, she definitely deserves a bunch of flowers and taken out for a meal...but only when we can go in the Olds lol
I was very encouraged when I took off the valley cover, but God only knows how old those lifters are.
Got family staying for a couple of weeks so have to divide my time a little bit better )
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Old August 12th, 2016, 01:28 PM
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It looked like it was hanging up, like I said small screen.
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Old August 12th, 2016, 01:30 PM
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Best way to tell would be to rest your finger on all of them as it runs, and see if any of those feel different.

- Eric
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Old August 12th, 2016, 05:04 PM
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To me it looked a little shy in the rocker oiling department. They never will oil like a SBC which will splatter oil every where but it doesn't appear to be putting much out. Any one else that works on first generation motors concur or does my engine just put out more oil than what I'm seeing here?.... Tedd

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Old August 12th, 2016, 06:19 PM
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I'm not familiar enough with those older engines to say one way or another.
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Old August 13th, 2016, 01:52 AM
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Originally Posted by Tedd Thompson
To me it looked a little shy in the rocker oiling department. They never will oil like a SBC which will splatter oil every where but it doesn't appear to be putting much out. Any one else that works on first generation motors concur or does my engine just put out more oil than what I'm seeing here?.... Tedd
My '55 has more oil on the rockers and valves, but that's after one went completely dry and I modified the tubes for all valves to increase the flow.
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Old August 13th, 2016, 05:15 AM
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I have to agree with Tedd ,it still looks drier than usual to me. Larry
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Old August 13th, 2016, 05:22 AM
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Question for the First Gen. guys:

Given that you see less oil on the top end than is usual for these engines, and given your experience with these engines, do you believe that the amount that you can see is still realistically enough to prevent damage or unusual wear (considering that probably all that is needed is for the contact surfaces to be wet)?
I can't answer that myself, as I have no experience with these.
Reason I ask is to help Nigel focus: If there is an oil flow problem, but it is unlikely to be immediately threatening, he can afford to ignore it for now, and concentrate on his bad cylinder, then get back to it at a more convenient time.


Question for Nigel:

When you had the engine apart. did you confirm that all of the pushrods were clear inside?

- Eric
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Old August 13th, 2016, 09:14 AM
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I don't think it is dry enough to be that critical, that he could not persue his miss,but I was afraid that it had damaged a pushrod,lifter,or cam lobe,and any one of those could cause a miss on one cylinder. From what I can tell on the video ,that doesn't seem to be the cause of the miss. Best of luck, Larry
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Old August 13th, 2016, 09:24 AM
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Originally Posted by Rocketowner
I don't think it is dry enough to be that critical, that he could not persue his miss,but I was afraid that it had damaged a pushrod,lifter,or cam lobe,and any one of those could cause a miss on one cylinder. From what I can tell on the video ,that doesn't seem to be the cause of the miss.
My thinking exactly.

- Eric
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Old August 13th, 2016, 01:31 PM
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Has a compression or leak down test been run?That would have given a better diagnose of which cylinder and why or whether it is mechanical or a electrical problem. If all the parts are evenly wet with oil more isn't necessary better, other than piece of mind.

the rockers appear to be fairly equal in up down movement but I would feel better if all of the push rods would rotate with the same ease. .... Tedd
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Old August 13th, 2016, 01:52 PM
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Originally Posted by Tedd Thompson
...but I would feel better if all of the push rods would rotate with the same ease. .... Tedd
They won't depending where the lifters are positioned on the cam.
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Old August 13th, 2016, 02:01 PM
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As I saw it on the video he was rotating the push rod as the engine was running or am I thinking of the first video? I'm WRONG. Went back and took another look and the engine wasn't running. I believe I'm a bit touched today.... Tedd.

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Old August 14th, 2016, 06:57 AM
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Originally Posted by MDchanic
Question for the First Gen. guys:

Given that you see less oil on the top end than is usual for these engines, and given your experience with these engines, do you believe that the amount that you can see is still realistically enough to prevent damage or unusual wear (considering that probably all that is needed is for the contact surfaces to be wet)?
I can't answer that myself, as I have no experience with these.
Reason I ask is to help Nigel focus: If there is an oil flow problem, but it is unlikely to be immediately threatening, he can afford to ignore it for now, and concentrate on his bad cylinder, then get back to it at a more convenient time.


Question for Nigel:

When you had the engine apart. did you confirm that all of the pushrods were clear inside?

- Eric
On mine all was O.K. as long as there was a "film" of oil on all frictional surfaces. The problem occurred when one of the rockers "polished" itself onto the tube stopping all flow of oil to that rocker. Then I modified the tubes to increase the flow to all rockers.
The stage 1 engines differed from the stage 2 engines on the path of oil to the rockers. Stage 2 fed each one through the lifter and push rod. Flow was controlled by the oil metering "valve" disk and the bottom of the push rod seat. On the stage 1, oil passed through the cylinder head into one of the interior rocker stands and then into the hollow rocker tube which had holes at each rocker location. The push rods were solid.
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Old August 14th, 2016, 09:49 AM
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Originally Posted by MDchanic
Question for Nigel:

When you had the engine apart. did you confirm that all of the pushrods were clear inside?

- Eric
Now this has reminded me of a question that I was to ask at the time I had everything apart and forgot to, the rods on my BBC were hollow inside, so when I had these rods out I expected to see the same thing and clean them out...but they were solid.

Anyway, It's all academic now guys as I've found the problem, I was curious why the rod on # 7 was spinning so freely....have a look at the video.

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Old August 14th, 2016, 10:03 AM
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Oh. That'll do it.

I couldn't play it loud enough to hear the audio while at work, so if you said anything, I missed it, but I would recommend doing a leakdown test on that cylinder once you've got a new spring, because poor spring pressure can cause burned valves (moreso on exhaust than intake though, so that's a good thing).

Since springs are cheap, I'd replace them all.

- Eric
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Old August 14th, 2016, 10:20 AM
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Good catch and not as expensive as most all of our other guessing was going to be.

That spring and keeper can be removed/ exchanged rather easily by using compressed air and an a adapter to the spark plughole to keep the valve up while you remove the spring and keeper. Or if you don't have a compressor you can stuff a bunch of 1/4 nylon rope down the spark plug hole, raze the piston and have it hold the valve up while you work on it, same thing just different way to do it. Hang in there you are getting it.... Tedd
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Old August 14th, 2016, 10:24 AM
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Originally Posted by MDchanic
Oh. That'll do it.

I couldn't play it loud enough to hear the audio while at work, so if you said anything, I missed it, but I would recommend doing a leakdown test on that cylinder once you've got a new spring, because poor spring pressure can cause burned valves (moreso on exhaust than intake though, so that's a good thing).

Since springs are cheap, I'd replace them all.

- Eric

Someone suggested replacing the springs and a few other VT items when I had it apart, this is what you get for not taking good advice.
And you missed my narration...
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Old August 14th, 2016, 10:31 AM
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Originally Posted by Tedd Thompson
Good catch and not as expensive as most all of our other guessing was going to be.

That spring and keeper can be removed/ exchanged rather easily by using compressed air and an a adapter to the spark plughole to keep the valve up while you remove the spring and keeper. Or if you don't have a compressor you can stuff a bunch of 1/4 nylon rope down the spark plug hole, raze the piston and have it hold the valve up while you work on it, same thing just different way to do it. Hang in there you are getting it.... Tedd

Thank you Tedd, I wasn't looking forward to pulling the heads again, so you've given me another option ..sounds good, but how would I compress the spring to get the keepers back on?
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Old August 14th, 2016, 11:40 AM
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Smile

Once you have pressure to hold the valve on that cylinder ,you use a tool similar to this one that Autozone (in the U.S. ) sells for $19.95. Hope you are able to find one in Essex. Some of the parts stores have them that they will loan you. Glad you located the problem for your miss. Keep us posted. Maybe the broke spring was the rattling noise that I thought was noisy lifters. Larry
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Old August 14th, 2016, 01:35 PM
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Good news indeed. That explains #7.


I'm guessing that you'll replace all the valve springs?


That'll give you some time to re-evaluate and time to think on #5. I had an intermittent miss on one cylinder for a while. I never even knew it. Engine ran fine. Slight rumble at idle. 7 of 8? No problem. My stupidity entirely and I hate to admit it here, but a learning experience.


I went to check my trans oil, and bumped a plug wire and it fell off the plug. I didn't get the clip entirely on the end of the plug....it took a lot to push it over the tip on that particular plug and at an awkward angle. I know enough so I should have known better.....Now the only indication I have that the engine is still running at a stop light? Oil pressure gauge...

Last edited by DFitz; August 14th, 2016 at 01:42 PM.
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Old August 14th, 2016, 01:52 PM
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Originally Posted by DFitz
7 of 8? No problem.
Yeah. As I've posted somewhere around here before, a buddy of mine had a '67 Newport with a 383 back in the '90s. He moved from NY to California, drove cross country pulling a heavy trailer. When he got to Cali., and got settled in, he looked the car over, found a spark plug wire off. It'd been off the whole trip and he hadn't even noticed.

- Eric
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Old August 14th, 2016, 02:11 PM
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Originally Posted by Rocketowner
Once you have pressure to hold the valve on that cylinder ,you use a tool similar to this one that Autozone (in the U.S. ) sells for $19.95. Hope you are able to find one in Essex. Some of the parts stores have them that they will loan you. Glad you located the problem for your miss. Keep us posted. Maybe the broke spring was the rattling noise that I thought was noisy lifters. Larry
Cheers Larry.

Originally Posted by DFitz
Good news indeed. That explains #7.
I'm guessing that you'll replace all the valve springs?
That'll give you some time to re-evaluate and time to think on #5.
I'm replacing the lot Dave, I was assuming that this broken spring on 7 was also the culprit on 5? got new Lifters too.....watch this space.
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Old August 15th, 2016, 12:44 AM
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Originally Posted by Eightbanger
Cheers Larry.



I'm replacing the lot Dave, I was assuming that this broken spring on 7 was also the culprit on 5? got new Lifters too.....watch this space.
Good luck. I certainly hope this is the culprit for both.
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