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By matt2491 - 11 Years Ago
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Hey guys,
Now that its warm here in New England again, I'm finally getting my rebuilt 292 buttoned up! The only thing I am missing now is a set of rocker arm adjusting screws. I need the type with the 5/8" jamb nuts. I thought I had a good set but upon closer inspection, the ball ends on a many of them are worn lopsided and generally not in good shape.
Anyone got a GOOD extra set of 16 laying around? Would be happy to pay for them.
EDIT: Maybe these aftermarket screws would work? Just looked at Harland Sharp's website, and they list screws for Ford FE that seemingly will work on a y-block. Part # FA716K. Dimensions are 7/16-20 x 1.200", 3/8" ball. Check em out: http://www.harlandsharp.com/component.htm You guys think they'll work? Summit Racing carries them.
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By gekko13 - 11 Years Ago
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I can't vouch for the Sharp adjustment screws but I believe the screws you seek are still available from NAPA.
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By matt2491 - 11 Years Ago
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I also just discovered Crane Cams # 99680-16 also appears to be an aftermarket drop-in.
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By lyonroad - 11 Years Ago
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Matt, when you get to the bottom of this it would be appreciated if you could post the outcome. I have at least 2 loose adjuster screws and need to find something that will work.
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By matt2491 - 11 Years Ago
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I decided to order both the Harland Sharp AND Crane screws. Will check em out, take pictures, and come back with the verdict.
By the way, I called NAPA and no one could locate factory replacements. 
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By John Mummert - 11 Years Ago
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Matt, the issue with aftermarket adjusters are that they are generally a true 3/8" diameter ball. The cup on aftermarket pushrods are usually a little over 3/8". There must be clearance between the 2 pieces for oil.Unfortunately, the original Ford adjusters were a little under 3/8" and the pusrod cups were true 3/8", or close to it.
When you use A/M adjusters with Y-Block or replacement Y-Block p/r's there might not be any oil clearance between the 2 pieces.
The correct adjusters will measure .365" +- or you must get custom pushrods made.
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By lyonroad - 11 Years Ago
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So John, I have your push rods. Do I use my original adjuster screws or do I need true 3/8" after market adjusters?
Thanks.
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By John Mummert - 11 Years Ago
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If you use high performance adjusters (Harland Sharp, Crane, Crower, Comp, Dove, ect) don't use stock or replacement pushrods.
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By matt2491 - 11 Years Ago
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Hey John,
Do you have any original-type adjusters in stock?
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By charliemccraney - 11 Years Ago
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That might explain the problems I had when I switched to the Dove rockers.
John, will the custom length pushrods I got from you have the larger cups? I got them a couple years ago and haven't put them in yet.
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By matt2491 - 11 Years Ago
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Got both the Crane and Harland Sharp adjuster screws in today. Turns out the Crane screws fit perfectly! The Harland Sharp screws do not. They are closer to a true 3/8", as John Mummert suspected. It is surprising because both the Crane and Harland Sharp screws are advertised to fit the same application (Ford FE), and both are advertised as 3/8" ball ends. However, and fortunately for us, the Crane screws do indeed have slightly smaller balls, nearly identical to factory y-block balls. They seat in the y-block pushrod cups perfectly!
The other positive about the Crane screws is that they are significantly less expensive than the Harland Sharp ones. The Crane screws are ~$50 while the Harland Sharp screws are ~$130. Both have allen socket ends. Both come with jam nuts. Both are well made.
We now know that the Crane screws part #99680-16 are a drop in replacement for factory y-block adjuster screws. I will be putting the Harland Sharp screws back in the mail. Can't wait to get this engine wrapped up!
Crane on left, factory y-block in middle, Harland Sharp on right.
Crane screw:
Factory y-block screw:
Harland Sharp screw:
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By lyonroad - 11 Years Ago
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Good work Matt. I assume they thread into the rockers nicely. My interference fit Ford rockers are very tight,except for the two that are loose.
Thanks
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By matt2491 - 11 Years Ago
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Both the Crane and Harland Sharp screws physically thread into the rockers just fine. No noted looseness or anything funky.
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