454 chevy stripped head bolt hole
#1
Senior Member
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Join Date: Jan 2003
Location: artesia new mexico
Posts: 172
454 chevy stripped head bolt hole
any you guys have any ideas about fixing one stripped hole in the block of a head bolt? heli coil? size i need? ive got just one that is stripped out right in the middle and its a long one not the short one in the bottom after i get it fix ed im going to studd this one thanks mike in new mexico
#2
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Join Date: Dec 2005
Location: Rutherfordton North Carolina
Posts: 192
They make tools to drill and tap your block straight but if you cant find one you can make one if you have access to a mill. take a piece of steel at least one inch thick and drill a hole in it thats the tap drill size,then drill another one next to it and tap that one.on the other end cut a slot that is wider than the 7/16 bolt.position the slot so it will reach any other head bolt. simply center the fixture up on the bad hole and bolt it down.using the tap drill size hole to square your hand drill,drill the bad hole to tap drill size. loosen the fixture and position the hole you tapped over the bad hole and clamp it down. screw the tap through the fixture and into the block.thats all there is to it.Bill
#5
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Join Date: Oct 2003
Location: S'West Michigan
Posts: 20
I have used Hendrens method and found it to be easy. It's pretty much imperative that the hole be perpendicular to the deck and w/o the block your hand drill will wobble enough to make the hole oversize. Ditto when you tap and then you have threads that are far from perfect. Makes it possible to strip or pull the heli-coil if not done right.
#7
Ed,
I think this is what he is talking about. You can get them in carbon or ss. I have used them in my machine shop and they do work very well. They make a tool to set the pins once they are screwed in. I make a threaded installer that screws into the ID and has an OD that stays inside the pins, then use the tool to set the pins.
http://www.jlindustrial.com/JRI-6592...T/product.html
Curtis
I think this is what he is talking about. You can get them in carbon or ss. I have used them in my machine shop and they do work very well. They make a tool to set the pins once they are screwed in. I make a threaded installer that screws into the ID and has an OD that stays inside the pins, then use the tool to set the pins.
http://www.jlindustrial.com/JRI-6592...T/product.html
Curtis