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Author
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Topic: stripped an aluminum head RR thread
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92coupe
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Member # 1957
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posted
 
 
on the very last RR that had to be tightened down the bolt just wasn't getting tight. so when i backed it out, the threads from the head came out with it. so i'm guessing my only option is tapping the whole. how tough is it going to be?
Justin
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94-GT BLOWN & STROKED
Posts: 1209 | From: antioch | Registered: Oct 2002
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AJBlackGT
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Member # 3936
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posted
Valve cover? Intake? Exhasut? What hole did you strip, and of them can be repaired fairly easily. Buy a heli-coil kit, drill the hole over size, tap it, and install a helicoil. Problem solved. ![[patriot]](graemlins/patriot.gif)
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90 Notch
Posts: 1896 | From: Sacramento | Registered: Dec 2003
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92coupe
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Member # 1957
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posted
quote:
Originally posted by AJBlackGT:
Valve cover? Intake? Exhasut? What hole did you strip, and of them can be repaired fairly easily. Buy a heli-coil kit, drill the hole over size, tap it, and install a helicoil. Problem solved.
like the post said the RR hole. RR = roller rocker. the hole that the RR stud screws into stripped out. i asked a guy about the helicoil but he said it might not work since it has so much stress on it.
Justin
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94-GT BLOWN & STROKED
Posts: 1209 | From: antioch | Registered: Oct 2002
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AJBlackGT
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Member # 3936
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posted
Oh I misread it. I thought by RR, you meant repair a stripped hole, I didn't know you were talking about a rocker stud hole. You may be right about that being to much stress in a helicoil. Maybe you could call the head manufacturer and see what they recommend.
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90 Notch
Posts: 1896 | From: Sacramento | Registered: Dec 2003
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66 AC COBRA
Nitrous King
Member # 904
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posted
im guessing the helicoil pulled out from an edelbrock head??
this is with pedestal rockers??
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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92coupe
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Member # 1957
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posted
quote:
Originally posted by 66 AC COBRA:
im guessing the helicoil pulled out from an edelbrock head??
this is with pedestal rockers??
No, the head is a FMS GT-40X head. and i honestly don't know the difference between pedestal mount and stud mounted so i couldn't tell you. they are 1.6 FMS RR's though.
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94-GT BLOWN & STROKED
Posts: 1209 | From: antioch | Registered: Oct 2002
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92coupe
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Member # 1957
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posted
quote:
Originally posted by AJBlackGT:
Oh I misread it. I thought by RR, you meant repair a stripped hole, I didn't know you were talking about a rocker stud hole. You may be right about that being to much stress in a helicoil. Maybe you could call the head manufacturer and see what they recommend.
i was thinkin of just tapping new threads and going with a larger bolt. think that would work?
Justin
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94-GT BLOWN & STROKED
Posts: 1209 | From: antioch | Registered: Oct 2002
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AJBlackGT
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Member # 3936
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posted
Do you have screw in studs? Or pedastal mount with a screw through the rocker? It may be hard to find the right oversized hardware
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90 Notch
Posts: 1896 | From: Sacramento | Registered: Dec 2003
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92coupe
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Member # 1957
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posted
quote:
Originally posted by AJBlackGT:
Do you have screw in studs? Or pedastal mount with a screw through the rocker? It may be hard to find the right oversized hardware
i guess they would be pedestal mount then since the screw runs throw the RR and into the head.
the bolt i would need would be fairly easy to figure out since the die/tap set tells you the thread size and all that. the only worry i have is how large i have to go since the head of the bolt cant be very much bigger.
Justin
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94-GT BLOWN & STROKED
Posts: 1209 | From: antioch | Registered: Oct 2002
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AJBlackGT
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Member # 3936
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posted
I think if you put in a long enough helicoil you would probably be fine.
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90 Notch
Posts: 1896 | From: Sacramento | Registered: Dec 2003
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66 AC COBRA
Nitrous King
Member # 904
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posted
you should be fine with a helicoil, you dont have much choice
other than taking the heads off and drilling out ALL of the holes and converting to 3/8 stud rockers instead of pedestal rockers
your current rockers use a 5/16 bolt, i think fine thread
studs rockers will use a 3/8 and 7/16 coarse thread studs
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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92coupe
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Member # 1957
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posted
66 AC COBRA i sent you a PM.
Justin
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94-GT BLOWN & STROKED
Posts: 1209 | From: antioch | Registered: Oct 2002
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