 Valve clearance with Chrome Moly Pushrods, Please confirm the clearance is to be ZERO |
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| jjs3rd914 |
 Aug 22 2018, 09:07 AM
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#1
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Member  Group: Members Posts: 124 Joined: 8-August 04 From: Sarasota, FL Member No.: 2,476  |
Finishing a 2056 build with new 2L head castings, new WebCam cam, etc. Valve geometry done and SAT, so have custom lenght new Chrome Moly push rods. From all the searches it seems the consensus is zero valve clearance with these push rods and we also installed new genuine 911 swivel feet adjusters.
Can we get a general consensus to confirm ZERO running valve clearance is preferred? or IF not what is the recommended clearance? Thanks jjs3rd914 |
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| Jetsetsurfshop |
Aug 24 2018, 10:15 AM
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#2
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Senior Member Group: Members Posts: 815 Joined: 7-April 11 From: Marco Island Florida Member No.: 12,907 Region Association: South East States |
Anyone have a picture of the camshaft after running zero lash? I'm having a hard time with this spec. (IMG:style_emoticons/default/huh.gif)
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| HAM Inc |
Aug 24 2018, 11:53 AM
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#3
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Senior Member Group: Members Posts: 850 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
QUOTE(Jetsetsurfshop @ Aug 24 2018, 09:15 AM)  Anyone have a picture of the camshaft after running zero lash? I'm having a hard time with this spec. (IMG:style_emoticons/default/huh.gif) Shane, I don't have pictures of cam wear when running zero lash, but I have pictures of valve seats and retainers that ran with excessive lash. That ticking sound you hear with loose valves is the valve train hammering itself. Do that at high revs on a race engine and the sound, if you could hear it, would be of the valve train beating itself to death. The cam won't wear more because of a starting lash of zero and you can always check the lash with the engine hot after setting zero cold. Not fun, but do it once if you are worried you aren't developing clearance and adjust your cold settings accordingly. |
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Posts in this topic
jjs3rd914 Valve clearance with Chrome Moly Pushrods Aug 22 2018, 09:07 AM
76-914 "0" clearance :beer2: Aug 22 2018, 09:13 AM ClayPerrine Adjust the valves so that you can turn the swivel ... Aug 22 2018, 10:51 AM Vacca Rabite What they said.
Set it to zero. No feeler gauge. ... Aug 22 2018, 10:53 AM Mark Henry :agree: Zero,
The big thing to watch for is once ... Aug 22 2018, 11:29 AM
worn
:agree: Zero,
The big thing to watch for is once... Aug 22 2018, 01:20 PM Mark Henry
:agree: Zero,
The big thing to watch for is onc... Aug 22 2018, 02:28 PM cuddy_k Yep. Someone once called it “loose zero” which... Aug 22 2018, 12:42 PM jjs3rd914
Yep. Someone once called it “loose zero” whic... Aug 22 2018, 01:16 PM jtprettyman
Yep. Someone once called it “loose zero” whic... Aug 22 2018, 03:42 PM bbrock So how does the noise compare between aluminum PRs... Aug 22 2018, 03:30 PM Mark Henry
So how does the noise compare between aluminum PR... Aug 22 2018, 04:11 PM Jetsetsurfshop Isn't there a requirement from Webcam for the ... Aug 22 2018, 05:53 PM Vacca Rabite
Isn't there a requirement from Webcam for the... Aug 22 2018, 09:45 PM euro911 Another term often used is 'zero lash' Aug 23 2018, 12:24 AM euro911 Read this: https://www.dragzine.com/tech-stories/h... Aug 24 2018, 11:05 AM Jetsetsurfshop I found a picture of my camshaft. Its just over a ... Aug 24 2018, 12:20 PM euro911 That could depend on a few factors ...
What did ... Aug 24 2018, 12:52 PM ClayPerrine The only time you should run 0 lash is when you ru... Aug 24 2018, 01:07 PM |
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