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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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I Supported Toymods
Location:
Lwr Templestowe, Melbourne
Registered:
August 2004
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Re: Putting sounds and burn marks on 3SGE head! Virtual mechanics needed!
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Sun, 01 May 2005 21:47
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Sounds like maybe the exhaust manifold is leaking.
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Location:
Adelaide
Registered:
May 2003
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Re: Putting sounds and burn marks on 3SGE head! Virtual mechanics needed!
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Sun, 01 May 2005 22:10
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Yeah, probably a leaky exhaust mani which has backfired. Or even just letting out super hot exhaust could do that
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Location:
Canberra
Registered:
October 2004
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Re: Putting sounds and burn marks on 3SGE head! Virtual mechanics needed!
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Mon, 02 May 2005 01:23
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exhaust manifold gasket.. or maybe the manifold.. probably the gasket though
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Location:
Perth
Registered:
October 2004
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Re: Putting sounds and burn marks on 3SGE head! Virtual mechanics needed!
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Mon, 02 May 2005 03:10
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Thanks for the help, I'll take off that heat sheild and see whats going on under there. Hopefully its nothing too dramatic.
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Location:
Adelaide, SA
Registered:
May 2002
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Re: Putting sounds and burn marks on 3SGE head! Virtual mechanics needed!
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Mon, 02 May 2005 06:04
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Oh oh i wanna say it too!
Exhaust leak in manifold!!!
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Location:
Sydney
Registered:
May 2004
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Re: Putting sounds and burn marks on 3SGE head! Virtual mechanics needed!
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Mon, 02 May 2005 10:13
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mine did the same thing but it WASN"T the gaskit from the block to the manifold it was the other side of the manifold (if that makes sense)
try and find out where it's from before you start undoing bolts.
if yours is the same try and get new studs. it's a lot easier
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Location:
South Australia
Registered:
July 2002
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Re: Putting sounds and burn marks on 3SGE head! Virtual mechanics needed!
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Fri, 06 May 2005 03:33
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Yeah your exhaust is leaking man. And it could be stuffing up the AF ratio and the EGR.
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Location:
Melb, Victoria
Registered:
April 2004
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Re: Putting sounds and burn marks on 3SGE head! Virtual mechanics needed!
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Fri, 06 May 2005 04:43
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Exhaust manifold leak.
Hopefully you just have to replace the gasket, but if that manifold is rusted out or cracked, it would be a good opportunity to fit some extractors 
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Location:
Perth
Registered:
October 2004
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Re: Putting sounds and burn marks on 3SGE head! Virtual mechanics needed!
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Fri, 06 May 2005 10:18
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Finally got a chance to take the heat shield off...
Two of the manifold bolts had fallen out, both bolts sitting close to their holes. Going to get the back in tomorrow and see how they go.
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Location:
Perth
Registered:
October 2004
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Re: Putting sounds and burn marks on 3SGE head! Virtual mechanics needed!
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Mon, 09 May 2005 09:14
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Turned out the manifold was missing four bolts and had blown the gasket. A $150 bill later and the car is running better than it has in a long while!
Thanks for the help guys!
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