Stock Exhaust Manifold bolt sizes for leak?

[ImpulseDrive]

Hi guys, I tried searching for this answer but didn't find the answer I was looking for so I wonder if anyone on here can help me.

I have an exhaust manifold leak and I will have to change the gasket and the reason why its leaking is because I think one or a couple of the bolts aren't gripping right. I know the best way to fix this is to helicoil (sp) them but I hear you have to remove the engine and stuff to do that and it would be too much work.

So I was wondering if anyone knew the exact bolt size, pattern etc that I would have to use after I remove my manifold and would like to tighten them with longer screws to keep it tight.

Thank you for any answers and I'm sorry if this has been asked before.

 

[gachax]

I've changed a half of them. Just bored and made one size bigger thread. No problems so far.

 

[1992supraman]

only one of my studs wasnt stripped or almost stripped when I bought my mkIII so I just replaced them all with one size bigger.

 

[Frank Rizzo]

All you had to do was search titles only with the word helicoil.

You need the M10 - 1.25 helicoil kit for the stock 7M exhaust manifold studs.

M10's can be installed with cylinder head on vehicle.

 

[isnms]

It can be done *in car* - ◊ Helicoil, in car ◊

 

[InFrnt0fU]

I take it the intake manifold bolts are the same size or no....noticed I had one missing the other day. Grade 8-10...

 

[p5150]

Use studs and nuts, not bolts. Studs wont strip out your head.

 

[williamb82]

read the part about helicoiling!!!

http://www.supramania.com/forums/showthread.php?t=68120

 

[Frank Rizzo]

Studs wont strip out your head.

Incorrect.

I take it the intake manifold bolts are the same size

Not even close. They are M8.

 

[Mk3runner]

http://store.driftmotion.com/Static/Item716exhauststudkit.php

works good.

 

[p5150]

Incorrect.

Ok - studs are less likely to stip out your head because they dont apply a tensile force while twisting into the threads. They utilize the entire depth of thread to support the fastener.

Does that make you happy?