Nigelw Posted June 15, 2015 Share Posted June 15, 2015 I previously just put std steel nuts back on but having sheared and rounded off all of the nuts and studs holding the turbo to the manifold I need to replace them, now remembering the old 2.6 6cyl exhaust issuesof the past I do remember the nuts being brass and easily coming off, only needing to replace rotten studs but having perfectly serviceable nuts. Any reason not to swap over on the turbo? I wonder if the heat will be an issue? Just double checking the studs from manifold to turbo are M8 X 25? Quote Link to comment Share on other sites More sharing options...
landroversforever Posted June 15, 2015 Share Posted June 15, 2015 If stainless are easier to come by they should be ok.... My turbo was held onto the studs with stainless nuts with no problems. 1 Quote Link to comment Share on other sites More sharing options...
Boydie Posted June 15, 2015 Share Posted June 15, 2015 Agreed, use stainless, brass can expand excessively and become loose with horrible results. BMC used to use brass nuts on their exhaust manifolds yonks ago but that was well before the economic advent of S/S nuts. Quote Link to comment Share on other sites More sharing options...
Nigelw Posted June 15, 2015 Author Share Posted June 15, 2015 If stainless is the way to go, then perhaps fitting stainless studs is also worthwhile? Although, I am hoping not to need to take it off again for a very long time!!! Quote Link to comment Share on other sites More sharing options...
landroversforever Posted June 15, 2015 Share Posted June 15, 2015 I would avoid stainless on stainless.... They can gall up and you will never get them undone! 1 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted June 15, 2015 Share Posted June 15, 2015 Agreed! Quote Link to comment Share on other sites More sharing options...
elbekko Posted June 16, 2015 Share Posted June 16, 2015 I'm also not sure why you still bother with the studs, just put a bolt through the hole and job's done... Quote Link to comment Share on other sites More sharing options...
Tanuki Posted June 16, 2015 Share Posted June 16, 2015 Brass is softer than steel, so for a given clamping pressure to be achieved you need more thread-length engaged between the nut and the stud than you would with steel. Typically, brass "manifold nuts" are have about twice the thread-length of equivalent steel ones. Do you have enough stud showing to allow this? If not, use stainless nuts. Quote Link to comment Share on other sites More sharing options...
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