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Weird rattle engine noise, 2500-3200 rpms? please help!

1065 Views 13 Replies 7 Participants Last post by  88Jetta
Ok, my engine is makin a really weird noise...from 2500 to about 3200 rpms. Its not really a rattle, really hard to describe....as the cam chain been known to make noises? thats all i can think of. It seems to come from the drivers side of the engine compartment, and it is independent of speed, but related to engine RPMs... Any ideas would be MUCH appreciated!!!
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Re: Weird rattle engine noise, 2500-3200 rpms? please help! (SauerKraut)

tranny?
Re: Weird rattle engine noise, 2500-3200 rpms? please help! (16v)

nope, checked that, its engine speed related. i can rev it at standstill, and it still makes this noise....
Re: Weird rattle engine noise, 2500-3200 rpms? please help! (SauerKraut)

clutch/flywheel grind? you're making it tough man
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Re: Weird rattle engine noise, 2500-3200 rpms? please help! (16v)

nope, not that it sounds like its coming from the head...or the top of the engine. Im thinkin Cam Chain.....
Re: Weird rattle engine noise, 2500-3200 rpms? please help! (SauerKraut)

probably is not the cam chain. check the duct that bolts to the exhaust manifold (for the heater hose) and make sure the downpipe looks okay...
Re: Weird rattle engine noise, 2500-3200 rpms? please help! (rocco2nr)

ahhh, maybe the flex coupling for the dual DP?? just throwing ideas out there
more info: it sounds like a metal sound. dammit, that doesnt help either, i know



[Modified by SauerKraut, 9:46 PM 2-10-2002]
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Re: Weird rattle engine noise, 2500-3200 rpms? please help! (SauerKraut)

I have a sound like that, but I know it is the makeshift aluminum bracket I made for my K&N oil breather.
Loose bolts somewhere, I torqued my valve cover to specs 1.5 years ago. Last month when I pulled the manifold I found that a few bolts were loose.
Re: Weird rattle engine noise, 2500-3200 rpms? please help! (88Jetta)

heat shield rattle.....?
Re: Weird rattle engine noise, 2500-3200 rpms? please help! (130_R)

thats rattling too right now, but thats not it. I keep thinkin its the cam chain...hrrmmmm!!
Re: Weird rattle engine noise, 2500-3200 rpms? please help! (SauerKraut)

broken ac braket. I had mine break and it made all kinds of werid metalic vibration sounds. It also broke damn near all of my other brakets before i figured out what it was. Mine only did it between 2800 and 3200. As the engine was reving up as soon as it hit 2800 the vibration level just increased like 10x and then went away after 3200.
good luck
Re: Weird rattle engine noise, 2500-3200 rpms? please help! (MyGTI)

i was just about to say broken ac braket, did it at the same exact rpms. goes from a/c to the back of the block. or atleast this bracket on mine did. get your self a stethoscope (sp?) oh and make sure its not your keys rattling.
Re: Weird rattle engine noise, 2500-3200 rpms? please help! (TommyC83)

Has an AC compressor ever been known to make weird noises? Maybe the bearing or something...?
Re: Weird rattle engine noise, 2500-3200 rpms? please help! (SauerKraut)

my compressor was making a slight grinding noise under ~1500 rpms, above that you couldn't really hear it.
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