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YOUR RESEARCHExhaust Tips - How to remove them?
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Clean tip
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Then put on a new 17mm nut and reattach the cleaned Tip.
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Suggestion
Once you get the nut off you could run a "die" up the thread of the "Domed Bolt to clean up the thread.
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Whilst I had the car up on the axle stands while cleaning the rears earlier I thought I might take the exhaust tips off and give them a real clean. The nuts on the bottom are very corroded. Almost as if you had a 18mm nut covered in some kind of metal cap that has rotted.
Just wondered if someone else had done this and what should I expect to find down there?
Hi Sean
The advice already given is very valid. Three other techniques may help:-
1) A sharp firm tap with a hammer via a mandrel if necessary on the head of the bolt to shock the tread. In conjunction with the WD40 treatment this will help. Get a block above the tip to counteract the blow to ensure the force is jarring the thread and not deflecting the system.
2) In conjunction with 1) get the exhaust nice and hot, put on gloves and try again.
THEN IS DESPERATION ONLY :nooo:
3rd and only if 1) and 2) dont work, a little direct heat from a welding torch! Use asbestos blanket to defend areas of the car.
Regards Big Bob
[/b]
Thanks guys.
My initial query is what am I actually trying to undo. The nut at the bottom looks either like it as coroded very very badly or it had some kind of cap on it which has corroded. Before I start cleaning it up I want to know what I am dealing with. Anyone who can tell me what size the nut is would be a great help as I will know if I am working back to good metal or working through what should be good metal.
thanks
Sean. I have the boxes from my old 996 in the garage so I tried the bolts with some spanners. It seems a bit odd, but the 15mm spanner won't fit and the 17mm is loose. I guess that means it is 16mm (don't have one of those) but it is caked in rust.
Here is a picture of what a new clamp looks like.
Hi Sean
Yes I've failed the odd exam by not answering the question
.
The nut at the bottom has domed head bolt on the other end of it. It is a 17mm nut. The domed bolt is welded/staked into the pipe which drops down from the Exhaust Box. This Pipe is fixed to the Exhaust Box by the Clamp in the picture Seagull showed in his reply.
The 17mm nut holds the Tip to the outlet pipe. It also allows the Tip to be positioned fore and aft to get it to protrude correctly from under the back bumper. The Tip has a slot in it to facilitate this adjustment.
Once you get the nut off you could run a "die" up the thread of the "Domed Bolt to clean up the thread. Then put on a new 17mm nut and reattach the cleaned Tip.
Method 4) could be to get a "nut splitter" on the offending corroded nut
.
Thanks and Regards Big Bob :bye:
