hi all, i went to fit my de-cat today and funnily enough something goes wrong lol anyway i went to undo the four downpipe studs and all of them are locked on solid they "crack off" but are so tight if i tried any harder they would definantly snap! any ideas guys? and if worst case scenario what would i have to do/replace if they snap thanks....
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Tight downpipe studs
- Thread starter peter_cupra197
- Start date
First thing to do is get some Plus Gas or WD40 on them and leave them overnight (or 24 hrs if you dont need the car and re apply it after the first 12 hrs) then in the morning get a small stiff bristle wire brush and clean as much of the corrosion off the studs as you can.
Once this is done the nuts should start to move but dont try and wind them off in one hit turn them till they nip up then a further 180' then turn them back 360' (this method cleares all the crap out much the same as if you were cutting a new thread), then repeat this process and with a bit of luck they will come off, apply plenty of WD40 or similar whilst you are doing this.
Once this is done the nuts should start to move but dont try and wind them off in one hit turn them till they nip up then a further 180' then turn them back 360' (this method cleares all the crap out much the same as if you were cutting a new thread), then repeat this process and with a bit of luck they will come off, apply plenty of WD40 or similar whilst you are doing this.
Heating them wont help much if the threads are badly corroded, they will need to be cleaned as above first.
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Remember the studs in the turbo can be replaced, can get them from SEAT. Just a bit piece of mind for you.
as said above, once you do get them off get new ones. I put copper grease on them too when I put them back in making it easier to get them off again.
and dont be alarmed when u start the car back up and its smoking like mad! just the heat burning off the oil! lol
i have new ones allready unfortunantly with work and gti springfest this weekend didnt have time to have a go 
but will attempt this at the weekend just a quick question if i have a new turbo to go on if they snap what will i have to replace as i have the fitting kit with the turbo will i have to replace manifold? thanks
but will attempt this at the weekend just a quick question if i have a new turbo to go on if they snap what will i have to replace as i have the fitting kit with the turbo will i have to replace manifold? thanks
dai cupra
Guest
This method will only work if the stud corrosion is not to bad if they are badly corroded then you can heat the nuts all you like but they will bind up eventually if the threads are not clear.
Still worth a go though if the studs are in good condition, but mine were not they were just a mass of rust and crap you could hardly see it was a stud. But once all cleaned off no heat was required to free the nuts off.
agreed. but by heating up the nut it expands it enough to ease it off. was like this when we did myki's. and when i worked as a mechanic at fords we did this all the time. good old oxy. i do use the wd40 first but i love the fire so heating them up is a must
looking at it im not sure if you could fit a blow torch etc. down the back off the engine 
i have started to spray them every night now gonna try tommorrow as im off work
i have started to spray them every night now gonna try tommorrow as im off work
I remember watching an apprentice heating a seized rear bottom shock absorber bolt and the oil exploding
![[:@]](/forums/styles/seatcupra/oldforumsmileys/furious.gif "Furious [:@]")
tried doing these today after soaking them in wd-40 last night and this morning two came off (nut only) and two are solid!!! i dont have access to a blow torch or simular unfortunantly so what are my options now Similar threads
