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Are joints rust-scale free?
Posted by RayF (more from RayF) on Tue, 13 Mar 2012 17:32:52
In Reply to: Re: Exhaust Pipe Connection Leak, Buckeye 
[Profile/Gallery]
, Tue, 13 Mar 2012 16:54:56
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Buckeye, this is kind of obvious and your having had it apart and back together again makes it unlikely, but the face that receives the belled end of the pipe can get a pretty heavy rust scale on it. If it's part cracked off and part not, that would leave a step and that wouldn't seal well.
Tap it with a hammer and it should all fall off.
The receiving face has a taper, the mouth of the pipe is belled, then the following cast-iron collar also has a corresponding taper in it, to squeeze the pipe up to the receiving face, at each of these joints. It's pretty hard to see how if all surfaces are rust free and squeezed tight, they won't mate up leak-free enough. The pipe is pretty malleable and would conform to the face it's being pressed to.
You had to drill out the original M8 bolts at that fitting, you said. What did you replace them with? If smaller, they might be part of your problem.
I'd use hardened bolts there, and you might consider switching to a fine-thread-pitch bolt as that lets you get things tighter.
Good luck.
posted by 71.173.6...
Posts in this Thread:
- Exhaust Pipe Connection Leak, Buckeye , Sat, 10 Mar 2012 13:29:58
- Re: Exhaust Pipe Connection Leak, danah, Sun, 11 Mar 2012 22:15:25
- exhaust putty, dave24
, Sun, 11 Mar 2012 18:10:08 - Re: Exhaust Pipe Connection Leak, dref, Sat, 10 Mar 2012 20:55:57
- You can use a metal "doughnut", John Fitzgerald , Sat, 10 Mar 2012 15:43:02
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