Stripped threads

[old_mr2]

Dudes,

Possibly due to over-tightening, I have managed to strip the thread on one exhaust manifold bolt hole and several intake manifold bolt holes. GZE motor.

Now, the best fix would be to drop the motor, weld up and re-tap the threads.

What permanent solution/options do I have without dropping the motor? Permatex make a re-thread product that would probably work for the intake side, but surely not on the exhaust manifold due to heat.

[trdee]

drill and tap bigger threads

also if the threads aren't completely fucked you can get a thread cleaner from supercheap/rapeco which may restore the thread if is isnt completely fucked.

[old_mr2]

I am afraid the threads in question are completely fubared.

drill and tap bigger threads

Hmm I wonder if this can be done in car? Very tight area even with the turbo and manifold off.

[fixeruperer]

heli coil..

[Lampoon]

heli coil x2

[old_mr2]

Yep, Another good option, but probably impossible to do in the AW11 engine bay. Ill take some measurements to see if I can get a drill up in that area. I reckon I will hit the firewall.

Intake side, lots of room...

[fixeruperer]

see if anyone has a right angle pneumatic drill. that would fit in there easily.

[lexsmaz]

Sometimes you can be lucky enough in that there might be some more thread Further down inside the stripped hole & if so you can get a longer bolt & fit it ..

I think if you have damaged that many I'm sure you are getting to heavy handed on the bolts / nuts, I would think it would pay you to buy a tension wrench so you don't go down this path again for your sake & you will also get a feel for how tight certain bolts should be done ..

[ctrain]

build up the screw with teflon tape until its a fecking tight fit

Dont listen to me

Nah seriously helicoils are good, so is retapping a bigger thread

[oldeskewltoy]

take the head off and fix it correctly....

[old_mr2]

Id prefer to drop the whole motor. Sigh. In the interim, I might see if I can set a stud in there (exhaust) Cheers.

[SHEPPO3930]

if there's no room to heli-coil it, then you have no choice but drop the motor or take the head off.

removing the motor only costs you fluids. taking the head off will cost you more (head gasket as a minimum).

[Hen]

Helicoil intake side. See if you can get a bit of allthread into the exhaust side as a stud. Maybe there is some non-rooted thread at the bottom of the hole.

Worth a try before dropping the engine.

[old_mr2]

Thanks Guys