Helicoil size for the lower intake manifold.

[Zaroth]

Anybody know what size helicoil I need for the bolts that attach the plenum to the lower intake manifold? I stripped out the threading changing my plugs out.

[FeaRpb]

I would tell you but I dont remember, I did text you the size about a year or two ago lol.

[Zaroth]

Couple phones ago :P. I thought about trying to look up your old thread, but seemed like it would be easier just to ask here. Good opportunity to add information to the new site also.

[FeaRpb]

Yeah, I really dont ask or post anything regarding technical stuff on the other site anymore, I want this database to grow.

[Roybatty]

I just did this about a month ago; after numerous failed attempts at using red thread lock lol; that was a waste of time. I picked up kit 770-3093 from NAPA, Helicoil Metric Thread Repair Kit. Size M8x1.25, came with drill size 21/64. This was used to replace DS stud to lower intake (attaches plenum to lower intake).

It happened to be on sale (IIRC about from 40+ bucks to under 30), but probably because I had ordered it a while ago, then didn't pick it up, cause they did not stock the item. Later I asked if it was in stock and it was and on sale.

[Zaroth]

Ah yeah, that size rings a bell. Thanks Roy.

[Zaroth]

If only we all had TIG welders sitting around lol.

Also, how you figure filling a hole up with a TIG welder and then redrilling and retapping is easier than... redrilling a hole, retapping, and putting the helicoil tang in is beyond me. Seems about the same to me. Except one doesn't involve pulling a welder out. :dontknow:

[TwIzTeD_3kGt]

FYI they have those helicoils at Autozone or Advance for much less than $30 IIRC.

[FeaRpb]

If I remember right I picked mine up at Advanced Auto for ~$24. You know which one I am talking about Dillon.

[Zaroth]

I was talking to Adam and he said I should order them of mcmaster.com. Going to have him go ahead and do my helicoils for me when I take my car up there. He is giving me an awesome deal on the whole thing. Can't wait to have the car purring again hah.

[Drweldin]

I'd think about the 3Sx stud kit....I just installed it on my car and am pleased with it. Because these things will continue to strip, one at a time, trust me, lol.

[TwIzTeD_3kGt]

I'd think about the 3Sx stud kit....I just installed it on my car and am pleased with it. Because these things will continue to strip, one at a time, trust me, lol.

Not if you torque them properly! They only call for 12 ft/lbs (IIRC)...either that or 7 ft/lbs.

[Drweldin]

Not if you torque them properly! They only call for 12 ft/lbs (IIRC)...either that or 7 ft/lbs.

It still happens. Each of the 2 or 3 times it's happened to me i was using a T-wrench. I typically use a T-wrench for everything. The AL threads will weaken over time...
Edit: And more importantly, look at how much thread engagement there actually is into the lower manifold...not very much which is also part of the problem. If they would have added a few more threads I'd agree with you (maybe).

[Zaroth]

I am having them all helicoiled so that I wont have that problem anymore. :D

[FeaRpb]

When are you going up there to get it done?

[Zaroth]

Over Christmas break. Going to drive down there and drop it off and then he is going to call me whenever its ready to pick up.

[FeaRpb]

Sounds like fun.