deezel Posted December 14, 2004 Report Share Posted December 14, 2004 Ok, I know BenKey and a few others have had issues with cam bearings. I looked back at Ben's thread and am wondering if my engine is heading in that direction. Here's what I am noticing: 1) So far, I have not noticed any loss of oil pressure. Sits about 38-40psi idle and ramps up to around 70-80psi on high rpm runs. I have never run the motor without oil pressure other than the 1-2 seconds it takes after an oil change to repressurize the system. 2) I have never revved the engine above 6000. Perhaps 10-15 times up to 5900 on the 1-2 shift. My normal shifts are set at 5600-5800 for all of my tunes. 3) My main concern is an intermittent squealing, binding noise coming from, I believe, the front of the engine. The first few times I heard it when driving, I thought it was the belt slipping - mainly because it will sometimes happen when I romp the gas and then let out after a shift. So, it seemed like it was just a "rapid rpm change" induced squeal - ala belt slip. But, more recently the noise has been happening on normal medium-heavy acceleration (not WOT, not just around shifts). It doesn't happen all the time... comes and goes randomly. I'll think the engine is sounding fine again, then screech, it happens again. Sometimes the sound is very slight, almost like a louder version of the normal alternator whine. Rarely, it can sound loud like a squealing belt. I have a new gatorback belt on there which is pretty snug, so I'm sure its not that. 4) Changed the plugs recently and all 8 have similar appearance - no red flags there. Changed the oil recently and looked for metal shavings, etc. Nothing significant, just a tiny, normal amount of "dust" on the drain plug magnet - no sparklies in the oil or filter. 5) I have been taking it easy on the motor lately, but I'm wondering how concerned I should be. I have considered trying to get the dealer to investigate this, but am worried about the competency of the service departments around here. If it is a cam bearing, how long would it take them to figure it out? I'm guessing they would say they can't reproduce the noise. Naturally I would return the engine to as near stock as possible. Easy enough to remove the n2o kit, plugs, wires, intake, e-fans. Oil change and stock plugs would be in order. I would return the PCM flash closer to stock (except !cats). Not sure if putting the t-stat back would be worth it. The things I cannot reverse are the P/P throttle body, cleaned cats, shift kit, and descreened MAF (the screen is no longer in "perfect" condition - it would probably be noticable, but I could give it a try). 6) Of course I would be interested in a cam swap if this is the issue. However, I am not familiar with replacing the cam bearings. How much is involved with putting new bearings in? Are we talking engine removal, or top end disassembly? Thanks for any help or advice you guys can offer. I hope I'm being over cautious. So, having said all this, how concerned should I be? Quote Link to comment Share on other sites More sharing options...
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