 Valve adjustment, Chrome moly push rods |
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| 80cap |
 Apr 20 2018, 02:28 PM
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#1
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Member  Group: Members Posts: 317 Joined: 6-February 15 From: ohio Member No.: 18,405 Region Association: None  |
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 |
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Replies(1 - 10)
| iankarr |
Apr 20 2018, 03:42 PM
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#2
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The wrencher formerly known as Cuddy_K Group: Members Posts: 2,477 Joined: 22-May 15 From: Heber City, UT Member No.: 18,749 Region Association: Intermountain Region 
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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
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| 80cap |
Apr 20 2018, 04:29 PM
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#3
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Member Group: Members Posts: 317 Joined: 6-February 15 From: ohio Member No.: 18,405 Region Association: None |
Solid lifters.
Brian |
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| TheCabinetmaker |
Apr 20 2018, 05:52 PM
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#4
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I drive my car everyday Group: Members Posts: 8,300 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Should sound very smooth. No rattles.
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| porschetub |
Apr 20 2018, 06:08 PM
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#5
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Advanced Member Group: Members Posts: 4,702 Joined: 25-July 15 From: New Zealand Member No.: 18,995 Region Association: None |
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 (IMG:style_emoticons/default/av-943.gif) (IMG:style_emoticons/default/av-943.gif) |
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| Mueller |
Apr 20 2018, 08:06 PM
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#6
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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Case ans heads are aluminium, they expand more than steel.
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| craig downs |
Apr 20 2018, 08:09 PM
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#7
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Senior Member Group: Members Posts: 768 Joined: 25-November 05 From: mira loma ca. Member No.: 5,189 Region Association: Southern California |
Check the clearance between the rockers and spacers. If it is a lot then that makes noise to.
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| wndsrfr |
Apr 20 2018, 08:37 PM
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#8
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Senior Member Group: Members Posts: 1,430 Joined: 30-April 09 From: Rescue, Virginia Member No.: 10,318 Region Association: MidAtlantic Region
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QUOTE(Mueller @ Apr 20 2018, 06:06 PM)  Case ans heads are aluminium, they expand more than steel. (IMG:style_emoticons/default/agree.gif) 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... |
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| nditiz1 |
Apr 21 2018, 06:29 AM
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#9
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Senior Member Group: Members Posts: 1,188 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region
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When should you use 0 valve lash vs the .006/.008?
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| 80cap |
Apr 21 2018, 06:50 AM
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#10
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Member Group: Members Posts: 317 Joined: 6-February 15 From: ohio Member No.: 18,405 Region Association: None |
Only with chrome moly push rods.
I going to check again for a loose rocker today before cars and coffee. Brian (IMG:style_emoticons/default/headbang.gif) |
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| Mark Henry |
Apr 21 2018, 06:54 AM
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#11
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
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. |
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