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#1
09-30-2019, 11:05 AM
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Rocker arm stud
Broke a pressed in rocker stud on my 389, is there any replacement screw in studs made for it?
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#2
09-30-2019, 11:40 AM
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If stud oiled, you have a can-O-worms. If solid stud, they are widely available.
__________________
"At no time did we exceed 175 mph.” Dan Gurney's truthful response to his and Brock Yate's winning of the first ever Cannonball Baker Sea-to-Shining Sea... Still have my 1st Firebird 7th Firebird 57 Starchief |
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#3
09-30-2019, 11:45 AM
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Thanks, it is a solid stud. Can't use the screw in's with the hex head I understand. Looking to find a screw in if possible
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#4
09-30-2019, 12:06 PM
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I would call Butler or SD Performance - either one would be able to line you out.
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#5
09-30-2019, 01:20 PM
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Screw in is possible, but requires changing all and having heads machined and tapped in order to do it.
__________________
"I know just enough to keep me here, but not enough to get me out" |
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#6
09-30-2019, 01:46 PM
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If you can get the old one out, why not press (pound) in a new one. If they're not available, pull one out of an old Pontiac head and use it.
I have pressed in studs in my two '64 GTO's with 9770716 heads. Sometimes, when I overrev the engine, one or more pulls out a little. I put a nut on it and pound it back in. I wish, so many times, I'd have put screw-in studs in those heads!
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BONESTOCK GOATS '64 GTO Tripower Hardtop (Wife's Car) '64 GTO Tripower Post Coupe (My Car) '99 Bonneville SE Sedan |
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#7
09-30-2019, 03:13 PM
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I had one do that when i had my 66. Pounded it back and never did come back out. I wonder if you could and some of that green loctite adhesive and push it back in? It may actually hold.
__________________
"I know just enough to keep me here, but not enough to get me out" |
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#8
09-30-2019, 09:13 PM
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I mentioned in another post that I had rotated one or more studs with a big breaker bar when I was given the wrong poly lock nuts. Pressed in stuff seems to hold very well.
Probably not if you run huge pressure valve springs. |
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#9
10-01-2019, 01:33 PM
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You can also pin the press in studs. Chevy did that on the hi perf 409 heads.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#10
10-01-2019, 01:38 PM
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Quote:
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#11
10-01-2019, 06:10 PM
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My original 64 GTO heads have Milodon screw in studs (no hex and larger thread diameter on top too). I had the work done many, many years ago and have never regretted that non-stock head modification. Don't plan on ever getting rid of the engine (348 HP) so no worries on that modification). I also installed Mickey Thompson Roller Rockers, (not roller tip in those days).
Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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