Experts need your help again please.
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Freshman User
Joined: Aug 2008
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Experts need your help again please.
As in last post I broke off the bolts to my thermostat housing. 4.9 L 6. I was unable to completely save the threads when drilling out. The original was threaded for 5/16 bolt. What I need to know now is what is the next size bolt to use now? And what size tap and drill bit do I use? Will a helicoil work so I could still use 5/16 bolt? Hope this makes sense. Thanks
Senior User
Joined: Sep 2007
Posts: 183
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From: Columbus, GA
If the hole isn't out round, you could buy a helicoil kit. They have the drill bit is bigger so the helicoil thread is the correct size.( if this makes sense?) That way you can use the stock bolt size 5/16..
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Freshman User
Joined: Aug 2008
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Well finally got it fixed. Bought the Helicoil kit. It only came with tap but no drill bit 21/64. I had to cut down the drill bit so I could get it and the drill into the engine compartment. After that all went well. Those Helicoils seem to be a good product and install fairly easy. Thanks for helping out.
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