|
Post by stevem on Mar 26, 2007 13:34:16 GMT
When i got rid of the auto choke (a good move) i changed the exhaust manifold to get rid of the hot air take-off. Done both sides to get some manifolds with a decent thread for the Y branch. The original manifold had no gaskets and from previous posts i could see that fitting gaskets may be a good idea. Now i have a leak (yes on the side that is a pig to get at). A while back i removed some manifold bolts from a later Sd1 and this had spring washers rather than lock tabs. The nearside manifold is fitted using these bolts / spring washers and this does not leak, but will spring washers lose their tempering with the heat?? The drivers side leaks and this was refitted with lock tabs. The probelm is that if i refit lock tabs with the new gaskets, it is difficult enough to even see the tabs let alone knock them up against the bolt. I'm wondering if they were actually holding the bolts before hence the leak. Can spring washers be used?? Before you ask, i'm not taking the engine out just to change the manifold gaskets!! When fitting the replacement manifolds i did double check that the gaskets were fitted the right way round as it is easy to make a mistake (bit like the Mr Bean at the dentists sketch).
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 26, 2007 13:57:16 GMT
Might it be possible to use "Philidas" nuts on the exhaust manifold studs? "Philidas" nuts look like a Nyloc nut but instead of nylon they have a crimped metal ring that bites on to the stud hence locking it on. Also, we use a general purpose silicon sealer on some exhaust manifolds to cylinder heads in place of gaskets, especially on race cars, and they never leak. Just a thought. Freddy
|
|
|
Post by Phil Nottingham on Mar 26, 2007 14:27:42 GMT
Spring washers will be OK - they may loose their spring after many years but then the threads will be well seized
|
|
|
Post by harvey on Mar 26, 2007 15:22:48 GMT
The one thing you can guarantee with the lockwashers is spending ages prising them back, only to find most of the bolts are loose. They never manage to hold the bolts tight, spring washers are the way to go.
|
|
|
Post by stevem on Mar 26, 2007 16:28:18 GMT
Thanks for help, will use spring washers. It is interesting to hear that silicon sealer will withstand such temperatures. You usually think of silicon sealer as something you put round your bath or shower tray!!
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 26, 2007 19:01:53 GMT
Trust me, It WORKS!
|
|
|
Post by eightofthem (Andy) on Mar 26, 2007 19:16:45 GMT
I just refitted my manifolds and i used stainless bolts with spring washers all ok so far
|
|
|
Post by Welsh Warlock on Mar 31, 2007 0:41:09 GMT
Had mne on springwashers for about 5 years and never leaked. Just had the manifolds off and the springwashers are still OK.
Make sure you put some copper slip on the bolts to ease their removal next time particularly if using stainless steel boults a sthey tend to be more brittle and prone to shearing.
|
|