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7th October 2019, 13:45 | #1 |
This is my second home
Rover 75 Saloon & Tourer Join Date: Sep 2012
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what type of bolt is appropiate
one of the 3 studs that hold the exhaust to the manifold ( think this is where the joint is) has been snapped (not by me) and looks to be too short to reuse. I think I will need to drill it and use a nut and bolt. Due to the heat and cold cycling, what type of bolt is required?
macafee2 |
7th October 2019, 14:07 | #2 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
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I swapped my three manifold to turbo bolts (plus a stud on a 1.8turbo), for stainless steel ones. I did the same for the turbo to downpipe flange as well as the five M10 manifold studs/nuts. Stainless steel bolts/nuts retain their condition better than standard stuff.
TC |
7th October 2019, 14:17 | #3 | |
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Quote:
On this page, one of the studs/bolts that attach item 1 to 2 and held in place by item 4 is the bolt/stud that has snapped. https://rimmerbros.com/Item--i-GRID001957 macafee2 |
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7th October 2019, 18:52 | #4 | |
This is my second home
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Quote:
They're studs (threaded rods sticking out of the flange), so they have to be unscrewed. You can do this be screwing on and tightening/locking together, two nuts. You then use a spanner on the innermost nut so the stud is turned/unscrewed. You then replace the stud with a stainless steel version using the same technique in reverse. Some stainless studs come with an Allen key socket to make refitting easier. All this stainless stuff is available on eBay. Ensure to get the appropriate thread. I think they're M10 but best measure the stud diameter and length to be sure. M10 Studs: https://www.ebay.co.uk/sch/i.html?_o...nless&_sacat=0 TC |
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7th October 2019, 19:36 | #5 | |
This is my second home
Rover 75 Saloon & Tourer Join Date: Sep 2012
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Quote:
I'll take a look tomorrow. At the moment I cannot get the original nut back on the stud. What stops the stud coming undone when the exhaust is removed and the nut undone? I had a motorbike and when the nut was undone the stud in fact undid and came out, the nut stayed seized on the stud. macafee2 |
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7th October 2019, 20:29 | #6 | |
This is my second home
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Quote:
If you don't want to have the possible problem having more snap off as you try to undo them, leave them in but use BRASS nuts, They don't seize on.-- |
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8th October 2019, 09:14 | #7 | |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
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Quote:
Different tightening torques. Corrosion apart, the stud will stay put because it's tightened into the flange to a significantly higher torque than the nut requires. So, slackening the nut afterwards doesn't slacken the stud. In some situations a high strength thread locking fluid might be used. When a stud slackens with the nut it's due to corrosion 'welding' the nut on. TC |
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