ClassicOldsmobile.com - Big Blocks http://classicoldsmobile.com/forums en Fri, 20 Nov 2009 22:40:33 GMT vBulletin 60 http://classicoldsmobile.com/forums/images/misc/rss.jpg ClassicOldsmobile.com - Big Blocks http://classicoldsmobile.com/forums The Weight (in LBS.) Of The 455 Olds Engine http://classicoldsmobile.com/forums/big-blocks/18133-weight-lbs-455-olds-engine.html Fri, 20 Nov 2009 15:01:08 GMT What is the weight, in pounds, of a complete (carb and all) 455 Olds engine? Thanks in advance. What is the weight, in pounds, of a complete (carb and all) 455 Olds engine? Thanks in advance. ]]> Big Blocks Texas Jim http://classicoldsmobile.com/forums/big-blocks/18133-weight-lbs-455-olds-engine.html improving performance on a 455 http://classicoldsmobile.com/forums/big-blocks/18118-improving-performance-455-a.html Thu, 19 Nov 2009 18:46:46 GMT My Jetstar currently has a 455 from a 1975 Vintage vehicle along with an edlebrock 650 Carb. It seems to be lacking. When I start it up it is very... My Jetstar currently has a 455 from a 1975 Vintage vehicle along with an edlebrock 650 Carb. It seems to be lacking. When I start it up it is very cold blooded and a good hesitation for the first 10 min or so of driving (keep in mind this car sat unused and not started for the past 5 years) after the 10 min mark of driving it the Hesitation is completely gone. I step on the gas.. It goes.

My friend is recommending putting on a 750 Carb on the engine and says it will run lots better. The plugs and wires, Cap rotor were all put on new shortly before it was parked.

Any other ideas?

I am also looking at rebuilding the engine as well. I have 2 choices for this. I can rebuild the current one in the car or I have been offered a 455 that was removed from a 68 Toronodo. Which Would be a better engine to use and any recommendations for good performance.

Thanks
Jeff ]]> Big Blocks crzyjef http://classicoldsmobile.com/forums/big-blocks/18118-improving-performance-455-a.html Olds 455 Vacuum http://classicoldsmobile.com/forums/big-blocks/18117-olds-455-vacuum.html Thu, 19 Nov 2009 18:45:34 GMT What's up guys? I recently put a vacuum gauge on my motor to try and tune my new carb a little bit and I got some weird readings. I found a port on the manifold to hook up to and started her up. No matter where I put the gauge on the manifold it will read about 5 inches at idle and then when I accelerate the motor the vacuum will climb to about 15-17 inches. Now this is the exact opposite of what I've read that is supposed to happen. Out of curiosity I hooked up to the PCV on the carb and got the same results, as well as with the brake boost. Anyone have any clue as to what is going on here? Thanks. ]]> Big Blocks 7.5 Litre Nightmare http://classicoldsmobile.com/forums/big-blocks/18117-olds-455-vacuum.html Header rubbing http://classicoldsmobile.com/forums/big-blocks/18095-header-rubbing.html Wed, 18 Nov 2009 23:42:31 GMT Finally got my 350 out for the 455 in my 72 cutlass but now trying to put my headers on I find there rubbing on the front cross member where the... Finally got my 350 out for the 455 in my 72 cutlass but now trying to put my headers on I find there rubbing on the front cross member where the engine bolts to. any ideas? ]]> Big Blocks suppressivefire http://classicoldsmobile.com/forums/big-blocks/18095-header-rubbing.html toro 455 stuck valves...guides? http://classicoldsmobile.com/forums/big-blocks/18092-toro-455-stuck-valves-guides.html Wed, 18 Nov 2009 22:00:27 GMT Hi Guys, I pulled a head to get at a sticky valve on my 1970 toro and was thinking when I pulled that valve...where's the valve guide? I don't see one...Don't these 455 toros have valve guides? or am I blind?...thanks now!... ]]> Big Blocks vettemad http://classicoldsmobile.com/forums/big-blocks/18092-toro-455-stuck-valves-guides.html r and r fuel pump 1956 olds 88 http://classicoldsmobile.com/forums/big-blocks/18065-r-r-fuel-pump-1956-olds-88-a.html Tue, 17 Nov 2009 20:51:16 GMT Help, How in the world do you remove the aft bolt on the fuel pump. My pump just started leaking at the gaskets and I thought it would be a... Help,
How in the world do you remove the aft bolt on the fuel pump. My pump just started leaking at the gaskets and I thought it would be a simple removal.
My inclination is to remove the bottom half just to get at this bolt. Any prior experienced suggestions would greatly be appreciated. Thanks Michael ]]> Big Blocks kaptmikey http://classicoldsmobile.com/forums/big-blocks/18065-r-r-fuel-pump-1956-olds-88-a.html 455 Block, value http://classicoldsmobile.com/forums/big-blocks/18055-455-block-value.html Tue, 17 Nov 2009 14:08:05 GMT I have a 455 "F"(sans serif) block...I believe 70-72, with pistons nothing else...what do you think it's worth? ]]> Big Blocks ozbie http://classicoldsmobile.com/forums/big-blocks/18055-455-block-value.html heads oil drain back holes. http://classicoldsmobile.com/forums/big-blocks/18046-heads-oil-drain-back-holes.html Tue, 17 Nov 2009 06:59:56 GMT whilst oversizing the drain back holes in the heads I have struck the adjacent head bolt hole . Is this a problem ?? Personally, I would have thought... whilst oversizing the drain back holes in the heads I have struck the adjacent head bolt hole . Is this a problem ?? Personally, I would have thought not as there nowhere the oil can go . I don`t know if it is the front or rear head bolt hole `cos , excuse the ignorance , the heads look kinda 'ambidextrous'.to me :eek: and I don`t know the difference !!!Trust the engine builder knows
The holes were enlarged from 9.5 mm -close to 3/8"- to 11mm -close to 7/16 "
I have cleaned around the breakout , do I have to get a sleeve inserted or is all ok ??
Thanks
mike ]]> Big Blocks geckonz08 http://classicoldsmobile.com/forums/big-blocks/18046-heads-oil-drain-back-holes.html Olds 455 Valve Stem Seal Question(s) http://classicoldsmobile.com/forums/big-blocks/17991-olds-455-valve-stem-seal-question-s.html Sun, 15 Nov 2009 14:08:12 GMT I have a few questions for you guys that have already, "Been there and done that".
History:
My vavle cover gasket began to leak a bit, tighening the bolts only helped for a little while. No biggie, last night I removed the valve covers.

I noticed at the corners of the head (where the oil drains back into the engine) was some type of plastic debris. After inspection, I realized that it was several pieces of an oil stem seal.

My Questions:
1 - My Engine doesn't smoke - Should I replace the valve stem seals now that I know at least one is missing?

2 - I bought new valve stem seals - Is it safe to say that the black seals are the exhaust side and the white are the Intake side?

3 - Should Olds 455 engines use Positive valve seals or Umbrella style seals?

4 - These new Umbrella type stem seals appear to just hang on the valve stem themselves. They don't snap onto the head or anything. - How do they wipe or meter the oil on the stem if they just float with the stem? ]]> Big Blocks esisson http://classicoldsmobile.com/forums/big-blocks/17991-olds-455-valve-stem-seal-question-s.html head cc`s http://classicoldsmobile.com/forums/big-blocks/17943-head-cc-s.html Thu, 12 Nov 2009 05:40:23 GMT just started work on polishing the heads . (see pics ) . -66 toro B heads As a result there may be some variation in cubic capacity . --how much... just started work on polishing the heads . (see pics ) . -66 toro B heads As a result there may be some variation in cubic capacity . --how much difference is allowable ?? How much variation is there in the factory product ? cheers
mike
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]]> Big Blocks geckonz08 http://classicoldsmobile.com/forums/big-blocks/17943-head-cc-s.html What is the depth of drill hole needed in the crank for a 4 speed input shaft? http://classicoldsmobile.com/forums/big-blocks/17939-what-depth-drill-hole-needed-crank-4-speed-input-shaft.html Thu, 12 Nov 2009 01:14:11 GMT Hey guys, I recently purchased a 1965 400 short block from 66-3X2 442. He helped me with the shipping which made it cost effective to buy it from... Hey guys,
I recently purchased a 1965 400 short block from 66-3X2 442. He helped me with the shipping which made it cost effective to buy it from him. I'm very pleased with the transaction and am now putting together an engine for my 1965 442. One question I came up against, his motor doesn't have a pilot bearing in it, but the back of the crank has a deeper hole than most of the automatic cranks I've seen. The center of the hole is about 0.80 deep. What I'm wondering is how deep must this hole be for the transmission input shaft to not hit the crank? I could put something together in the garage to try and figure it out, but hoped someone here might already know the depth needed?
John ]]> Big Blocks 2blu442 http://classicoldsmobile.com/forums/big-blocks/17939-what-depth-drill-hole-needed-crank-4-speed-input-shaft.html Q jet Q http://classicoldsmobile.com/forums/big-blocks/17926-q-jet-q.html Wed, 11 Nov 2009 13:05:26 GMT 69 442 400 ci, auto, air, q-jet w/ Divorce choke

Is the [I think it's called] "pull off vacuum" [ or vacuum brake] on the passanger side of the front of a Q-jet purppose to prevent the secondaries from fulley opening up at WOT so the engine can "catch up" and won't bog down?:confused: Or a smoother "kick in? ]]> Big Blocks Jamesbo http://classicoldsmobile.com/forums/big-blocks/17926-q-jet-q.html help with engine i.d. and motor mount solution? http://classicoldsmobile.com/forums/big-blocks/17903-help-engine-i-d-motor-mount-solution.html Tue, 10 Nov 2009 17:59:40 GMT Hi everyone, I'm new here. Just came across a '60 Super 88 and bought it on a whim because, well, you do that sometimes! Turns out the engine had been swapped at some point, and done in a pretty hokey way. Ever seen motor mounts made of a rubber block and two pieces of EMT electrical conduit before?! Haha.
So anyway, I need to:

(a) Identify this motor. (From photos I can find here and elsewhere online, it looks to me like a 394 from '63 or so? The stamping on the left side of the engine near the valve cover is H204574. There is also a casting number, 578510 on the right side exhaust manifold. I am attaching photos.)

and:
(b) I need to come up with a motor mount solution. Does anyone have any photos or diagrams of what the correct mount for this motor looks like? I think this would help me figure out how to mount this motor in the car. Would it be a good idea to start with the right mount for the engine and make some kind of block or brace to adapt it to the frame? Or adapt a '60 mount to fit the engine? Any ideas or direction anyone can offer would be really appreciated. Never had to do anything like this before but I'm game to make it work!
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]]> Big Blocks mscott http://classicoldsmobile.com/forums/big-blocks/17903-help-engine-i-d-motor-mount-solution.html New 455 rebuild Oil Pressure Question http://classicoldsmobile.com/forums/big-blocks/17888-new-455-rebuild-oil-pressure-question.html Tue, 10 Nov 2009 05:36:29 GMT Rebuilding another 455 olds, and I want to know if I buy a high volume oil pump if I have to buy a bigger oil pan? My machinist tells me it is a... Rebuilding another 455 olds, and I want to know if I buy a high volume oil pump if I have to buy a bigger oil pan?

My machinist tells me it is a myth, and the high volume oil pump will not suck the stock pan dry.

Looking for better oil pressure than 10 psi... That is too low to me.

Need some advice.
Thanks ]]> Big Blocks 71cutlasssx http://classicoldsmobile.com/forums/big-blocks/17888-new-455-rebuild-oil-pressure-question.html spark plug installation torque http://classicoldsmobile.com/forums/big-blocks/17878-spark-plug-installation-torque.html Tue, 10 Nov 2009 02:10:59 GMT I'm trying to do things more professionally these days so I routinely go to my handy torque specification sheet that I downloaded from the web for an Olds 455.
It wants me to torque my spark plugs to 30 ft.lb. This seems like way too much. I've got a 71 455 with iron heads.
I'm ready to put them in by feel like I always have but I'm sure I've never tightened them to 30 ft.lb. Is this accurate? ]]> Big Blocks 68conv455 http://classicoldsmobile.com/forums/big-blocks/17878-spark-plug-installation-torque.html