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Valve lash is not holding steady

Posted By Brent Last Year
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Valve lash is not holding steady

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Brent
Posted Last Year
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Last Active: 2 Weeks Ago
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Valve lash is not holding steady after first few runs:

First run: lash opened .006 Second run: the same thing. Third run: I adjusted lash again at .020 cold and then ran the engine for 5 seconds. The lash has opened up again, this time after just a few seconds. I think that if there is something failing at this fast of a pace it would be gone/done already.

The threaded adjusters measure .4360 on the OD of the threads, the ECG rocker ID measures .4395 on the groove. That is a .0035 difference without the depth of the grooves added.

I found two postings that both mention either damaging the threads or using oversized adjusters. Any words of wisdom will be greatly appreciated.

Rocker adj nuts
Loose rocker adjusting screws. - 332-428 Ford FE Engine Forum

Harland Sharp makes these screws but I'm not sure they will fit, threads are +.004 wider and the ball is +.0125 wider, If the 1.200 is the length of just the threads seems like they should be a tighter fit: 7/16 - 20 x 1.200, 3/8 Ball, Ford FE 
http://forums.y-blocksforever.com/uploads/images/6271b929-36a9-4e4b-bd6a-ac6b.jpg





.150 Stroked Y-Block:327.25 ci @ >1hp per ci  http://forums.y-blocksforever.com/uploads/images/5ee2950b-da9f-4796-ad18-e428.png

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Forum Post Valve lash is not holding steady By Brent ( Last Year )
Forum Post Look at the ball and the wear pattern. I suspect you have a pushrod... By famdoc3 ( Last Year )
Forum Post The wear mark on the ball is pretty small on the tip and it's football... By Brent ( Last Year )
Forum Post I would give Smith Brothers or Manton a call. I’ve worked with both... By DryLakesRacer ( Last Year )
Forum Post I'm assuming good oil flow at the rockers. I’ll suggest ‘bluing’... By Ted ( Last Year )
Forum Post HAVE YOU REMOVED THE SPILL TUBES,AND BLOCKED THE HOLE IN THE STAND.IF... By 2721955meteor ( Last Year )
Forum Post From the pictures you have posted, your ball end of the adjuster is... By Daniel Jessup ( Last Year )
Forum Post The supplier told me that the problem is that the cup is not machined... By Brent ( Last Year )
Forum Post I’m assuming the Smith Brothers push rods have cups that accept a 3/8”... By DryLakesRacer ( Last Year )
Forum Post The new adjusters arrived: 3/8” ball x 7/16-20 “oversized” (these fit... By Brent ( Last Year )
Forum Post There’s no need to remove the cotter pins from the shafts to install... By Ted ( Last Year )
Forum Post The #5 exhaust pushrod will not clear the rocker arm, it's only a... By Brent ( Last Year )
Forum Post If you loosen the rocker hold down bolts and nuts, there may be enough... By charliemccraney ( Last Year )
Forum Post Is there any reason not to remove the cotter pins and then wiggle the... By Brent ( Last Year )
Forum Post Removing the cotter pins should work, too. Do it however you are the... By charliemccraney ( Last Year )
Forum Post I installed the new pushrods and adjusters; pulling the cotter pins at... By Brent ( Last Year )


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