Rb25 Exhaust Manifold Installed: 1 Bolt Hole Threaded

[islade]

Hey guys,

Just installed my new exhaust manifold. It's a stock one with external gate attached to it. Anyway, 11 studs are very happily installed. The one on the top row second from the rear somehow threaded out the hole it's supposed to go into. So i've installed it gently, but if i put any real pressure on it, it spins freely as i've obviously damaged the threads inside the hole.

If all 11 others are attached securely, am I going to be okay, or is this going to be exhaust leak central?

If it is a problem, how do i fix this?

Thanks,

Isaac

[The Mafia]

Exhaust leak central

Where is the stripped hole? Go and get a helicoil kit, and repair it. Its piss easy to do. Just make sure you have a practice somewhere if you haven't done it before.

Also, you might even be able to do it where it is without taking the manifold off.

[JonnoHR31]

aslong as both the manifold and head are straight and clean then it'll be fine, and given the top row is pretty easy to get to with a standard manifold anyway it cant hurt to see how it goes.

[The Dan]

aslong as both the manifold and head are straight and clean then it'll be fine, and given the top row is pretty easy to get to with a standard manifold anyway it cant hurt to see how it goes.

You can't be serious? It's going to leak no matter how flat both surfaces are. Not straight away, but eventually. Then it destroys a gasket, and other studs that cop the heat from it.

Do it once, do it properly. Helicoil as suggested above

[JonnoHR31]

so all the hundreds of standard cars driving around with 3-4 studs fallen out with no leaks are miracles? its a thick cast iron manifold, its not gonna bend from 1 missing stud

[The Dan]

so all the hundreds of standard cars driving around with 3-4 studs fallen out with no leaks are miracles? its a thick cast iron manifold, its not gonna bend from 1 missing stud

Didn't say the manifold was going to bend. It's going to leak though. And the studs fallen out of hundreds of standard cars is because the gasket is leaking, causing the hot gases to pass over the stud. If he puts this all back together without fixing it while it's close, then it WILL leak, it's only a matter of time....and from what I have seen, no more than about 3 months depending on what he does with the car

[islade]

Cool

I don't think it's worth "seeing how it goes" because the inconvenience of removing everything again overpowers the "pay some mobile dude $88 to come fix it for me tomorrow)

Words stupidest question, but with the studs, does the "long threaded end" or "short threaded end" go into the head?

[JE-R33GTS-T]

Haha I like it! I'm the same I'll give it a chop and have a go if I don't think I'll stuff anything expensive after a bit of reading but I have no probs calling someone to fix it

[JE-R33GTS-T]

As for studs I had one stuck in with loctite from the previous owner haha no wonder the back two cylinders had no exhaust gasket left I pulled the stud out with my fingers

Edited January 30, 2011 by JE-R33GTS-T

[JonnoHR31]

Cool

I don't think it's worth "seeing how it goes" because the inconvenience of removing everything again overpowers the "pay some mobile dude $88 to come fix it for me tomorrow)

Words stupidest question, but with the studs, does the "long threaded end" or "short threaded end" go into the head?

short end goes into the head

[Smegul]

You can't be serious? It's going to leak no matter how flat both surfaces are. Not straight away, but eventually. Then it destroys a gasket, and other studs that cop the heat from it.

Do it once, do it properly. Helicoil as suggested above

what? I have 2 broken studs and have never had a leaking problem???

[snozzle]

an old r33 gtst of mine had a broken stud and didnt leak from the cylhead/manifold gasket at all for the 5-6 months i had it guess i was lucky

[islade]

I got "mobile threadfix" to helicoil it yesterday afternoon. The guy was very friendly and did an awesome job!

Should be putting the manifold back on tonight, hopefully now without issue

[Beer Baron]

well done. yeah some of those mobile thread repair dudes are awesome. hands like a surgeon! lol.

[l0WRB]

good 2 hear mate! just remember when u line dump/wastegate setup up its a bit of a c.unt lol cause wastegate is plumbed in its all a very snug fit.

[islade]

Cool, if it's too hard, that's a sign from the gods to chop the pipe off and go screamer style

[89CAL]

you'll probably find that the cars that have broken a stud over time may or may not have a leak due to being on the car for hundreds of hot/cold cylces were the gasket has bonded slightly to the head and manifold. It's a bit hit and miss, I had 1 broken stud and didnt have any exhaust leaks but others might not be so luc

[89CAL]

you'll probably find that the cars that have broken a stud over time may or may not have a leak due to being on the car for hundreds of hot/cold cylces were the gasket has bonded slightly to the head and manifold. It's a bit hit and miss, I had 1 broken stud and didnt have any exhaust leaks but others might not be so lucky.

With a new gasket as said above, this will not work as the gasket will leak pretty quickly

Edited February 1, 2011 by 89CAL