Rb20Det Exhuast Studs

[Samgrainger32]

hey my car has had a bad oil leak since i got it but over time it has got worse and have found it coming from the last manifold bolt at back of the motor after looking in to it more the stud at some stage has been replaced and who ever had done it must of drilled to fare in to the block and has made the oil push out under pressure i belive i can fix this by sealing up the stud somthing like liquid metal or something the workshop where i take the car to had quoted me $500-600 to do this i want to try to advoid that and would like to find out if i could fix it my self ill looking for some pictures of the side of the motor with the manifold off so i know what i would be looking at before i start ripping stuff off and find im in to deep so any pictures would be great or addvise

cheers

[jhjones]

Are you sure the leak isn't coming from the passenger side rocker cover gasket? Pretty common.

[PRO_32]

Are you sure the leak isn't coming from the passenger side rocker cover gasket? Pretty common.

I agree that would be pretty fckn shitty workmanship if someone has done that. Assuming you havent already, I would clean that whole are degreaser/ petrol, gerni whatever just to get rid Of whatever oil is there on the head and block.. Then run Motor and check for the source, but if it is A hole into an oil galley then theoretically you could use a thread sealant But it would have to have a Pretty high temp rating..

[Samgrainger32]

Yes I've had the hole motor cleaned up on hoist and ran watched the oil slowly leak from the bolt and had the rocker covers checked by workshop and is dry as it is coming from that bolt for sure and yes very very poor work as it was done by a well knows an very expensive workshop.. So you thinking take the stud out put thread lock or sealer around the bolt and put back in?

[mad082]

I'd take the stud out and put some sort of sealant or putty at the back of the hole to seal up the oil leak. Let it set properly before putting the stud back in. I wouldn't bother with anything on the thread as it will only end in tears if you have to remove that stud again

[PRO_32]

I'd take the stud out and put some sort of sealant or putty at the back of the hole to seal up the oil leak. Let it set properly before putting the stud back in. I wouldn't bother with anything on the thread as it will only end in tears if you have to remove that stud again

Yes but how often would you be changing studs?? And you could be asking for trouble trying to block that hole one you don't have the head sitting on a bench do its awkward and tight working on it anyway and if bits of whatever your trying to seal the hole with breaks of its going to end up in your oil..

[PRO_32]

Oh btw 500 600 would buy you a whole rb20 head

[mad082]

Yes but how often would you be changing studs?? And you could be asking for trouble trying to block that hole one you don't have the head sitting on a bench do its awkward and tight working on it anyway and if bits of whatever your trying to seal the hole with breaks of its going to end up in your oil..

if the hole is big enough that bits of what you'd be sealing it with could get into the oil, then the hole must be pretty big and the only option taken should be a new head. not to mention that there would be more chance of part of the alloy from the head around the hole ending up in the oil.

[Samgrainger32]

ok so update on the hole thing spent the hole weekend on it turbo manifold everything off and found the manifold bolt i had to fix the stud come out nice and easy looked like the stud was still brand new i looked in the hole with a mirror and light and seen where they put the helicoil in and could not see any bad holes but there was oil around and inside the hole i cleaned everything down with breakclean and mixed up my sealer (jb weld) and put a good amount on the thread of the stud and could see the end of the hole in the head was long way from where the stud finished i felt confident there would be none that would get in to the hole i put the stud back in with the sealer and left it for 24hr to dry then refit the manifold and dumpipe and turbo and my hart stoped when i went to start it and see if it leaks started fine and no leaks at idel but the big test was driving it drove it for about 30mins got back and not one leak the motor and manifold was bone dry could not be happier and have been driving it every day for the last the 2 weeks and not a drop of oil and only cost me $18.95 and a weekend of my time :)

thanks every one for there help