Don't have two valves on the same perch.Individual perches.

 

OK,I'm numb from this motor.Took the heads back off and replaced the valves as they were all different lengths from the valve job that was done on it and while I was in there I replaced the lifters as well,MAW.So,new lifters,pushrods,rocker arms,Perches,bridges stods,valves,valve guides.Put it all together it spells noise.I'm at my wits end.I really hate this engine.Also has new oil pump,polished the crank all new bearings.Going to drive it as is and see what happens next.The wife is buggin' me,"I want my car back"Then she says to me,"swap the engine from yours to mine"Like that's gonna happen.I've never had a problem as frustrating as this.I've had 3 mechanics with combined experience of 100 years tear their hair out as well.WTF!!!!!!!!!!!

 

Are they all clacking? I meant 2 valves on the same bridge assy.

 

Yes,all of them,this engine would make a great boat anchor.I was warned about number 2 heads.I should have listened.

 

They all have side to side slop.meaning they move side to side.All brand new sealed power matched parts.I give up.as far as I'm concerned this was not a good design and no one in Ct.can figure it out or wants to be bothered with it.

 

But what length pushrods did you get? If they are too short like the others you will have noise....

 

Stock,8.257 inches.Please ,not to sound stupid.But would that affect the side to side motion of the rockers?I've never seen a setup like this.I have always been lucky enough to have the rockers with *****.No side to side.It's tight otherwise.Again,I don't5 wish to appear stupid or whiney but this is just pissin' me off.

 

You need to get the proper length pushrods, which means you must measure preload or lack there of. The lifters are spring loaded and when not pressurized with oil the spring has very little resistance. If the intake is off and the lifters such that a pair has both intake and exhaust valve closed you should see the spring/plunger depressed a little. The rockers will have side to side movement. This depression is preload. With no preload your rockers will tap. You cant just buy stock pushrods and expect proper operation.

 

Just asking a question. How much oil is getting up to the rockers?

 

Getting plenty of oil.Now everything else is stock and was stock before.The heads weren't milled and the head gaskets that went on there were Felpro,same as what was on it before as the engine was rebuilt before I bought it.So what changed the geometry to the point that it needs different sized push rods?I am aware of how lifters work.The engine is back together for the third time in 2 months.I can't fit a feeler gauge between the rocker and the valve stem so I really don't know what length push rod would fix this problem.I know I could buy many different lengths of push rods and experiment ,but that's a little extreme.I really don't want to take the intake off again.That's getting a little old if you know what I mean.Tell me another way to figure out the proper length push rod and I'll be more than happy to try it.I had a full head of hair when I started this project,gettin' mighty thin now.

 

This would work better with the intake off so you can see what your doing.

Check your preload by collapsing the lifters (pumping the oil out of them) first and in the following order to see how much longer your pushrod needs to be to set the rocker arm to "0" lash + .125:

At 0 deg TDC, both number one valves shut.

Check the #1 exhaust valve
Check the #1 intake valve
Check the #3 exhaust valve
Check the #5 intake valve
Check the #7 intake valve
Check the #2 intake valve
Check the #4 exhaust valve
Check the #8 exhaust valve

Now rotate the engine 360 degrees. The mark on the balancer should be back at the TDC mark. Keep in mind that this is not the TDC where #1 would be firing! It's where #6 would fire.

Check the #3 intake valve
Check the #5 exhaust valve
Check the #7 exhaust valve
Check the #2 exhaust valve
Check the #4 intake valve
Check the #6 exhaust valve
Check the #6 intake valve
Check the #8 intake valve

 

Yeah,that's what I was afraid of.

 

Since the engine was rebuilt before your ownership you really dont know what was done to the heads or what lifters were in there etc. I recently rebuilt a 400 to stock specs and I had no lifter preload not even with a set of adjustable pushrods so I needed new ones. The only thing I suspect in my case was that the lifters were perhaps shorter than GM originals. I doubt your new lifters came from GM so you really dont know if they vary from stock specs. They do sell an adjustable pushrod to use as a tool for determining proper length. I have little experience with the 65 style rockers. On the 66 up rockers you can measure preload under the bridges between the head surface. You would tighten down the set of rockers till slight resistance is felt which would be the spring pressure and insert the feeler in between bridge and the head. It is easiest with intake off....

 

Here's a question for ya. When the engine was rebuilt, did the machine shop put the right cam back in? 330s have a different camshaft angle than 350s do. 39* vs. 45*. If the builder put in a 350 cam that could scroo the whole pooch.

 

Cam not replaced,It's like new.

 

Shop only had the heads and crank.