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Posted by: 80cap Apr 20 2018, 02:28 PM

Ok, I set the valves to zero lash the engine has a very noticeable rattle. I think I read that they will sound like a bucket of bolts but I don't recall the sound level being this loud. I rechecked the clearance twice. The engine pulls real strong. I'm all ears!
Brian

Posted by: cuddy_k Apr 20 2018, 03:42 PM

shouldnt really sound like a bucket o bolts. do you have hydraulic lifters? If so, and it's been a while since the car was driven, it can sound really noisy till the lifters inflate with oil

Posted by: 80cap Apr 20 2018, 04:29 PM

Solid lifters.
Brian

Posted by: The Cabinetmaker Apr 20 2018, 05:52 PM

Should sound very smooth. No rattles.

Posted by: porschetub Apr 20 2018, 06:08 PM

I don't understand zero lash with steel pushrods ,makes sense on a hyd lifter motor but on a solid tappet motor what happens when the engine heats up and expands width wise ?,surely the expansion rate would be different between steel and alloy pushrods ???.
I'am old but I never stop learning

Posted by: Mueller Apr 20 2018, 08:06 PM

Case ans heads are aluminium, they expand more than steel.

Posted by: craig downs Apr 20 2018, 08:09 PM

Check the clearance between the rockers and spacers. If it is a lot then that makes noise to.

Posted by: wndsrfr Apr 20 2018, 08:37 PM

Jake explains it that way....with lash at zero with engine cold it'll open up to .004-.006 with the engine hot, so you'll hear a bit of the usual ticking from the valves especially with thin oil....BP 20/50 may keep it a bit quieter...

Posted by: nditiz1 Apr 21 2018, 06:29 AM

When should you use 0 valve lash vs the .006/.008?

Posted by: 80cap Apr 21 2018, 06:50 AM

Only with chrome moly push rods.
I going to check again for a loose rocker today before cars and coffee.
Brian

Posted by: Mark Henry Apr 21 2018, 06:54 AM

Running .006 on steel PR will make them noisier.
They are noticeably noisier cold and you can still hear it warm, especially if you have a quiet exhaust.