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Location:
Perth
Registered:
October 2004
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Putting sounds and burn marks on 3SGE head! Virtual mechanics needed!
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Sun, 01 May 2005 15:29
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My car has been behaving oddly the last few days. Other than some strange sounds and smells, it runs okay, but I know something is wrong. Here's a description of what's been going on:
o The car has been making a 'putt-putt-putt' sound while accellerating, less present while cruising. I know what it sounds like when its low on oil or pinging, and its not like those.
o The car's temperature has been sitting a little higher than normal, even though the weather has been getting cooler. It would normally sit at about 40%, now it's sitting ~47%.
o I hear small backfires on every gear change now
o I popped the bonnet to check on the oil (which was just below full) and I noticed black burn marks around the engine head, and also the insulation in the bonnet was all burnt out around the head.
o The oil pressure gauge seems a little less responsive than usual, may be my imagination.
Sorry the pictures suck, my mobile phone camera doesn't like low-light sitations and I didn't have another chance to grab photos:
 (Hard to make out, but the light spot in the underside of the bonet is a hole burnt in the insulation)
I'm no mechanic, but I've got a few theories:
o I think I heard a small pop while I was driving, and the sound started from that point on. It wasn't long after I replaced my straight through exhaust with a traditional muffler. I hypothesised that the extra pressure caused by adding the muffler blew something up front (the marks seem to be above where the factory extractors sit).
o I filled up my oil two weeks before. I didn't think I over filled it, but I wondered if I did, and maybe that caused something to blow.
o My car was running really out of tune for a while (lots of pinging under accelleration) and I only recently got that fixed back up. I wondered if some damage was done during that time. My engine isn't in great condition to start with, the piston rings seem worn as its burning more than a litre of oil ever 1000k's.
I can also record a sound file of the 'putt-putt-putt', if it would help.
Does anyone have any knowledge of the sitation? I'm working full time at the moment, taking public transport, and so I don't have a chance to get my car to a mechanic for a while.
[Updated on: Sun, 01 May 2005 18:21]
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