Valve cover stud
+6
Wayne Pearce
butterbean
cool40
dfree383
gmsmkr
460Dave
10 posters
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Valve cover stud
I thought I might share this and prevent someone else from the same fate.
A valve cover hold down stud on a P51 (and I think on the A460) can, and will, work its way into the intake runner and on top of the piston.
Mine were red loctited into the wing nut hold down, but one came loose and made lots of noise while driving through the water box. Only bolts for me from now on.
A valve cover hold down stud on a P51 (and I think on the A460) can, and will, work its way into the intake runner and on top of the piston.
Mine were red loctited into the wing nut hold down, but one came loose and made lots of noise while driving through the water box. Only bolts for me from now on.
460Dave- Posts : 108
Join date : 2009-08-21
Re: Valve cover stud
Also on the frpp scj heads....
gmsmkr- Posts : 1364
Join date : 2014-06-22
Location : alabama
Re: Valve cover stud
And factory iron CJ's
dfree383- BBF CONTRIBUTOR
- Posts : 14851
Join date : 2009-07-09
Location : Home Wif Da Wife.....
Re: Valve cover stud
Not on A460's
cool40- BBF CONTRIBUTOR
- Posts : 7313
Join date : 2009-08-31
Age : 53
Location : on the 1/8 mile dyno
Re: Valve cover stud
did this just happen over the weekend???
butterbean- Posts : 676
Join date : 2012-12-25
Age : 60
Location : Naples, Florida
Re: Valve cover stud
yes, Friday night... on the 6th pass of the evening
460Dave- Posts : 108
Join date : 2009-08-21
Re: Valve cover stud
Damn that sucks, did you get any good passes in before this happened???
butterbean- Posts : 676
Join date : 2012-12-25
Age : 60
Location : Naples, Florida
Re: Valve cover stud
I guess one way to assure that doesn't happen to your engine is to use "real" studs" (pardon me for not knowing the proper terminology), such as ARP valve cover studs, 1/4-20 lower end, with 1/4-28 upper end - they physically cannot work their way into the intake port. They may be expensive, but not nearly as expensive as a grenaded motor. Believe me when I say I'm NOT trying to be a sarcastic - just trying to be helpful.
Wayne (SAWDOFF) Pearce
Wayne (SAWDOFF) Pearce
Wayne Pearce- Posts : 658
Join date : 2009-08-19
Age : 81
Location : Greenfield Center, New York
Re: Valve cover stud
One could also gall the threads a bit at the center of a piece of allthread, but Wayne's solution is best.
maverick- BBF CONTRIBUTOR
- Posts : 3059
Join date : 2009-08-06
Age : 72
Re: Valve cover stud
when was using a429 heads i tigged a small "bead" on the stud so it would have a stop on the stud. never broke and they lasted for years.
norm- Posts : 261
Join date : 2009-08-06
Location : michigan
Re: Valve cover stud
I use 1/4 20 allen head bolts put them in with a tee handle allen wrench
69F100- BBF CONTRIBUTOR
- Posts : 5386
Join date : 2009-01-04
Age : 57
Location : Irwinville Ga.
Re: Valve cover stud
I like the ARP valve cover studs because they have the "ball nose" on them, and it makes it a whole lot easier to drop the washer on, and start the nut. Being that the threads are "rolled", the nut starts easy, and spins down the length of the stud with no hang ups.
Wayne (SAWDOFF) Pearce
Wayne (SAWDOFF) Pearce
Wayne Pearce- Posts : 658
Join date : 2009-08-19
Age : 81
Location : Greenfield Center, New York
Re: Valve cover stud
460Dave wrote:I thought I might share this and prevent someone else from the same fate.
A valve cover hold down stud on a P51 (and I think on the A460) can, and will, work its way into the intake runner and on top of the piston.
Mine were red loctited into the wing nut hold down, but one came loose and made lots of noise while driving through the water box. Only bolts for me from now on.
A "set screw" type stud very easily can but, a stud with a thread break in the middle with fine threads on the top will not.
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