Porsche 997 exhaust manifold triangle + bolts corrosion
Discussion
Hi
Haven't posted here in a while, would appreciate some opinions / advice.
I've owned a 997.2 for 6 years now, 3 years ago the exhaust manifold bolts + triangle were reported to have seized and I was advised to change them.
I appreciate this is a valid issue and how much effort it can be to change them if they're being stubborn.
Regardless, I paid the rather large sum of money, got them changed for new parts and went on my way.
The problem is, the car went in for its MOT / service again today and the bolts have been reported to have seized again.
My question is - given they replaced with genuine Porsche parts 3 years ago, is this a reasonable amount of time for them to have seized again?
Given I've barely done 5k miles on the car a year and it has been garaged during the colder periods it seems a bit quick.
The cost of the job to fit less than 100 quid's worth of parts is coming out to be just shy of a grand... which whilst I understand from a potential labour cost perspective, I'm deeply unhappy about to have to pay out for again in such a short period of time.
Any thoughts weclome, is this a reasonable amount of time for corrosion to have set in?
Haven't posted here in a while, would appreciate some opinions / advice.
I've owned a 997.2 for 6 years now, 3 years ago the exhaust manifold bolts + triangle were reported to have seized and I was advised to change them.
I appreciate this is a valid issue and how much effort it can be to change them if they're being stubborn.
Regardless, I paid the rather large sum of money, got them changed for new parts and went on my way.
The problem is, the car went in for its MOT / service again today and the bolts have been reported to have seized again.
My question is - given they replaced with genuine Porsche parts 3 years ago, is this a reasonable amount of time for them to have seized again?
Given I've barely done 5k miles on the car a year and it has been garaged during the colder periods it seems a bit quick.
The cost of the job to fit less than 100 quid's worth of parts is coming out to be just shy of a grand... which whilst I understand from a potential labour cost perspective, I'm deeply unhappy about to have to pay out for again in such a short period of time.
Any thoughts weclome, is this a reasonable amount of time for corrosion to have set in?
Edited by D1m3b4g on Thursday 31st May 15:57
Edited by D1m3b4g on Thursday 31st May 16:17
On the 996 the studs are pressed into the flange and consequently an absolute pig to drill out. Once drilled out and replaced with nuts and bolts it is a lot easier to do.
My car already had nuts and bolts fitted but severly corroded. I changed all 6 nuts and bolts in a couple of hours - all needed grinding or sawing off. I bought three sets of locking nuts and bolts so they will be a service item.
If yours has nuts and bolts already shouldnt be a big bill to swap them out.
Ian
My car already had nuts and bolts fitted but severly corroded. I changed all 6 nuts and bolts in a couple of hours - all needed grinding or sawing off. I bought three sets of locking nuts and bolts so they will be a service item.
If yours has nuts and bolts already shouldnt be a big bill to swap them out.
Ian
I did my 996 a few years ago...think the size was 8 mm. Easier to buy a length of stainless steel screwed rod and a pack of nuts. You can just chop the rod and make as required. The rods can be cut to an accurate size preventing ugly long lbolts sticking through nuts. An easy solution and much better looking...I bought mine on e bay ...good luck with the job , fitting new ones is easy ,,getting the old ones out not so!
Edited by Polome on Friday 1st June 10:33
The issue is they were replaced with genuine Porsche parts which in the case of exhaust bolts unfortunately means they're made of cheese.
I'm part way through replacing all the exhaust bolts and nuts with stainless steel ones on my 997. It's an absolute pig of a job, this is what mine looked like.
A lot were replaced in 2015 when the engine was rebuilt but they had still decayed to the point where they had to be ground off. It's all down to what they're manufactured from and where they're situated, they undergo constant bombardment from everything on the road surface.
This is the remains of the exhaust systems nuts and bolts from just the nearside, I can't for the life of me understand why Porsche don't use non corrosive material to manufacture these.
I'm part way through replacing all the exhaust bolts and nuts with stainless steel ones on my 997. It's an absolute pig of a job, this is what mine looked like.
A lot were replaced in 2015 when the engine was rebuilt but they had still decayed to the point where they had to be ground off. It's all down to what they're manufactured from and where they're situated, they undergo constant bombardment from everything on the road surface.
This is the remains of the exhaust systems nuts and bolts from just the nearside, I can't for the life of me understand why Porsche don't use non corrosive material to manufacture these.
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