Hi, I accidentally stripped one of the thread hole for the base of the carb. The stud itself is fine. But I think the thread in the hole is pretty much stripped. Therefore, the corner of the stripped thread many not have enough tension to prevent vacuum leak.

Any easy way to fix the stripped thread hole besides replacing the whole intake manifold?

Thanks

 

You will need to get all of this to fix it. I did the same thing on my lower intake.

 

forum won't let me upload pics, i'll try later

 

Re-tap with a metric STI tap of that size which is an oversize tap that will allow u to install a heli coil in the hole.

 

will a longer stud fit?

 

I don't know how much of a wall there is around the stripped hole, but you could use a helicoil and use the same screw as you are using now.

Loc tite (I believe) makes a metal filled epoxy designed to fix stripped thread holes. Basically, you put the stiff in the hole, coat the screw with some lubricant, screw it in , and let the epoxy dry. I don't know what the temp allowance is on this stuff though. I found some of this at Home Depot.

 

How does HeliCoil work? I have been doing some research on the Loctite type of filling to fix the problem and it sounded pretty convincing.

Anyone has experience on either of those product? Pls, let me know.

 

basically you drill out the old thread and retap with the tap suplied with the kit and then you wind the insert into the threaded hole and snap off the drive tang

you then have a brand new stainless thread in your alloymanifold

 

Thanks for the info. Hey, will I be able to use my original stub??? I am concerning the hole will be bigger than original.

 

yep, you will be able to use the original stud. the damages hole is oversized and retapped useing the tapp supplied. the hole is oversized to make way for the thickness of the Helicoil itself.


another, less preferred option is to drill the hole to the next oversize and retap the thread to take an oversize bolt.

most fastener stores will carry oversize fasteners.

(i can only talk from and aircraft repair point of view, where oversized fasteners are a regular occurance)