Stipped bolt hole...how to fix?
#1
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Join Date: Jul 1999
Location: Indianapolis, IN
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Car: 1991 Firebird
Engine: 412ci/sb
Transmission: Built 700R4
Stipped bolt hole...how to fix?
I believe I stripped the top thread in one of the oil pan bolt holes in the block. Can I use a tap and retap the threads? What are my options? Thanks
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- 412ci/sb
#3
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Join Date: Jun 2001
Location: New Port Richey, Florida, USA
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Car: 1989 Pontiac GTA Hardtop.
Engine: ZZ4 - 350
Transmission: Garbage
I have used the Helicoils. they aren't cheap, but they work good.
good luck
Mike
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Check out My Car Pics http://albums.photo.epson.com/j/Albu...667&a=13599419
Gran Turismo Americano "The Ultimate Firebird"
Smokin 1989 GTA- Bone stock except for exhaust. (no catalytic-stainless pipe into Flowmaster 2 chamber) & AC Delco Rapid Fire Plugs
good luck
Mike
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Check out My Car Pics http://albums.photo.epson.com/j/Albu...667&a=13599419
Gran Turismo Americano "The Ultimate Firebird"
Smokin 1989 GTA- Bone stock except for exhaust. (no catalytic-stainless pipe into Flowmaster 2 chamber) & AC Delco Rapid Fire Plugs
#4
TGO Supporter
if the cost isn't too high for you i'd use a heli-coil. if you don't like that you should be able to go to the next larger size 5/16-18 or maybe even a metric size. you'll just have to remember you have 1 bolt hole a bastard size.
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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM
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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM
#5
Josh,
Heli-Coils work O.K., but can fail from spring distortion and elongation. They also require a special tap available from Heli-Coil (can you say "Bend over"?).
Try a Jergens thread insert. They are solid steel to prevent distortion, use standard taps for installation, and all but the locking pin type are easily removeable if you ever need to replace one. The inserts are about a buck apiece.
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Later,
Vader
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Justice and Freedom will Prevail
[This message has been edited by Vader (edited September 20, 2001).]
Heli-Coils work O.K., but can fail from spring distortion and elongation. They also require a special tap available from Heli-Coil (can you say "Bend over"?).
Try a Jergens thread insert. They are solid steel to prevent distortion, use standard taps for installation, and all but the locking pin type are easily removeable if you ever need to replace one. The inserts are about a buck apiece.
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Later,
Vader
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Justice and Freedom will Prevail
[This message has been edited by Vader (edited September 20, 2001).]
#6
Supreme Member
I don't think I'd spend the $$ on a helicoil kit for the oil pan, I'd drill out to the next size and tap it. There isn't much torque requied to seal the pan gasket.
Since you'll have to open up the hole in the pan anyway, to get the helicoil in, it'd be just the same using a larger bolt.
Since you'll have to open up the hole in the pan anyway, to get the helicoil in, it'd be just the same using a larger bolt.
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