2500 RPM+ clicking? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-12-2003, 09:18 PM   #11
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Considering I've had the car for one day, I'm amazed at the community here. There'* a simalar feeling in the club I'm in for the chrysler, but mainly because the of the cars short production period and numbers. I would have never expected that here, but don't mind it one bit either. I'm really motivated to hook this car up
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Old 10-12-2003, 09:36 PM   #12
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What a trip! I got bedsores on my ***. Fun though. Blew some cars off the road. They were in my way. Got into a hill climbing race with a 325i on the way back. You'll see it in the video I'm working on. Ummmmm......he got out of my way, too, but wasn't happy about it!

I'll get the engine noise video posted here very soon!
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Old 10-12-2003, 09:44 PM   #13
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Glad you made it back in one piece. Those roads can be down-right deadly,also very fun when you have the road to yourself, but deadly. Thanks again for the help Will.
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Old 10-12-2003, 10:40 PM   #14
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FUN roads. Love it. You'll see that video soon.

Here'* the first clip of the sound:
http://home.comcast.net/~93ssei/justin92ssei.MPG

And here it is again.....watch where i put the stethescope:
http://home.comcast.net/~93ssei/justin92ssei2.MPG

According to the doctor, it'* louder at the water pump, and muffled at the thermostat.....anyone hear a water pump like this? Thought it might be a balance shaft or bearing, but it'* quiet on the TB end, and loud at the WP.

Scantool was also throwing a code 58, but the alt was only putting out 11 volts.
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Old 10-12-2003, 10:50 PM   #15
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Thinking of the bearing, wouldn't you hear it on start up too?
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Old 10-13-2003, 03:46 AM   #16
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THAT SOUNDS EXACTLY LIKE WHAT I HAVE!!!! Whoohooo someone else to share my pain. Ok so here'* what I know of the "similar sound" comming from mine. From reading on several web pages about "noise diagnostics" it seems to point 98% towards whats called Rod Knock. Its basically when the rod bearing is worn down so much that there is a small gap between the rod cap and the crank. That click is the rod actually banging against the crankshaft, and in more severe cases also hitting the head/valves. A rod bearing makes more noise at the oil pan than elsewhere. Hold RPMs at 2500, jerk the throttle open and let it snap closed. This will accentuate rod knock. Now'* the time to starting shorting out cylinders. A rod knock will double its cadence when the spark plug associated with the cylinder making noise is pulled. Check those things out. If that is the case it sucks man but in most cases the only fix is to pull the engine and do an overhaul. In some cases you could just drop the oil pan and replace the bearing but it sounds like yours is to the point where its been beating itself up so much that the crank would be scored and needing a regrind. I really hope I'm completely wrong on what it is, for both of our sake.
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Old 10-13-2003, 03:50 AM   #17
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Btw, this is the only confirmed audio of rod knock I can find:

http://www.ae92gts.com/downloads/randy_rod_knock2.wav

This is from the cab so its a bit muffled but you can still hear it.

EDIT> I also found this that sounds much more like what you have
http://freeautoadvice.com/sounds/rodknock.wav
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Old 10-13-2003, 12:30 PM   #18
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That sounds like bad news, but I still don't understand why it sounds so severe at the waterpump and nowhere else? This was checked with a stethescope.
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Old 10-13-2003, 01:28 PM   #19
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Ok, but those sound like a constant sound. On Mine it turns over fine and you hear nothing until 2000rpm?Is that possible?
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Old 10-13-2003, 03:45 PM   #20
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Quote:
Originally Posted by DrJay
THAT SOUNDS EXACTLY LIKE WHAT I HAVE!!!! Whoohooo someone else to share my pain. Ok so here'* what I know of the "similar sound" comming from mine. From reading on several web pages about "noise diagnostics" it seems to point 98% towards whats called Rod Knock. Its basically when the rod bearing is worn down so much that there is a small gap between the rod cap and the crank. That click is the rod actually banging against the crankshaft, and in more severe cases also hitting the head/valves. A rod bearing makes more noise at the oil pan than elsewhere. Hold RPMs at 2500, jerk the throttle open and let it snap closed. This will accentuate rod knock. Now'* the time to starting shorting out cylinders. A rod knock will double its cadence when the spark plug associated with the cylinder making noise is pulled. Check those things out. If that is the case it sucks man but in most cases the only fix is to pull the engine and do an overhaul. In some cases you could just drop the oil pan and replace the bearing but it sounds like yours is to the point where its been beating itself up so much that the crank would be scored and needing a regrind. I really hope I'm completely wrong on what it is, for both of our sake.
Here'* one of the most important questions. How huch money am I looking at having to spend? I know I don't have the time or money to put into this acr. I've got another car that does that, not to mention a family. I also know that if I sell this car for the $500 I paid, I'm a fool. What would it take to fix this problem.
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