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Grand Master
muffler EXPLODED!!!!
heheh
i saw this on another bmw board that im on
Hello all,
On starting my 1989 525i today there was an extremely loud bang from the back of my vehicle.
I believe that the vehicle suffers from over-fuelling during startup and I think a sufficient amount of fuel found its way into the rear muffler, causing quite a nasty explosion when it ignited.
As the pictures below show the muffler casing has exploded outwards causing significant damage to the bumper!
http://hotbimmer.com/forum/showthread.php?p=149571 theres the link to the orig thread
Throbbing Member
damn!
1995 540iA M-Sport - 76k miles. 1 of 1 auto AW3 cars.
1995 540i/6 - Misc Parts donor for above.
2 Grand Master
Darn.... Thats something I would expect my car to do....
-Charles
5-10 Grand Master
on my old rx7 i backfired and popped the precat in half
all america wants is cold beer warm cat and a place to take a poop with a door on it
Super Moderator
The precat or the thermal reactor... the old rx7's 78,79,80 had a
thermal reactor up at the exhaust manifold as a precursor to the cat..
they didn't put the cats on till i think 81 and got rid of the pos thermal reactors... just like the ones i used to hate on the first generation emission catalyst 911's. at any rate my 79 rx had a thermal reactor
Originally Posted by winfred
5-10 Grand Master
on my 83 the pre cat was hollow when i took it off to hollow it out and the main cat was a pellet type, unscrewed the plug and dumped them out and pulled out the steel wool, it ran much better, that's about the most fun you can have with 100 hp and 100lb of torque
all america wants is cold beer warm cat and a place to take a poop with a door on it
Major Contributor
The exact same thing happened to the previous owner of my car, the silencer split down the side. Luckily there was no damage to the bumper. I've only recently thrown the pipe away, or I would have taken a photo for you. As you all are probably aware, I bought my car as a non-runner with engine bearing problems. When I re-installed my rebuilt block I noticed that the P O had made some botched repairs to "fix" the surging idle, eg vacuum pipes removed, throttle position sensor switch out of line, not allowed to close. This thing must have idled at 1600 rpm!!!! I'm not really surprised the rear silencer blew out - there is already a lot of fuel being injected on a cold start, so to add even more to the mix will result in great pyrotechnics!
Cheers,
Shaun
Major Contributor
That guy should buy a new set of tires when he gets the muffler fixed.
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