I suspect I may have a bolt hole in the head stripped at one of the exhaust manifold holes. What are the common solutions for this? I was thinking of tapping it and using a slightly larger bolt. Has this been done much?
stripped bolt hole @ exhaust manifold
- Thread starter LoneRanger
- Start date
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I'd either helicoil it or put some filler in there with a stud
bk
bk
- Thread starter
- #3
In your opinion are helicoil or filler w/stud better than tapping?
To install a helicoil you need to drill and tap a larger hole, but you install the coil and that allows you to use a bolt of the original size. If you just drill and tap to a larger bolt size, you will also have to drill out the hole for the bolt in the manifold and you may have clearance issues with the bolt head. I've had good success using Helicoils. I have aftermarket aluminum heads for a ford engine where all the tapped holes have stainless helicoils installed at the factory for improved thread strength.
depending on the location of the stripped hole, gluing in a stud may interfere with installing the manifold.
depending on the location of the stripped hole, gluing in a stud may interfere with installing the manifold.
Often you can get by with using a bit longer bolt.......
I had that happen about 10 years ago. It was bolt right in the nook at the firewall so my options were limited. Went to ACE hardware and explained my dilemma. He set me up with an SAE bolt that was just slightly larger. Was able to tap the old hole and it worked great.
- Thread starter
- #7
Thanks. Good suggestions all. Gotta take it apart and look at it real close to see which is the best option for me.
Time-Sert. Better than a Helicoil.
tap and new bolt or stud whatever you want
- Thread starter
- #10
Hey bkfj40 can you tell me what brand/type of filler you're talking about?
helicoil kit
it's best that you repair it.you can actualy buy a kit that comes w/a drill bit,installer and a few helicoil.apply a small amount of red loctite to stay in place.an angle drill would be perfect to handle this job. john
it's best that you repair it.you can actualy buy a kit that comes w/a drill bit,installer and a few helicoil.apply a small amount of red loctite to stay in place.an angle drill would be perfect to handle this job. john
