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*maxitech* · 11-29-2008, 06:43 PM

A couple of weeks ago Matt and I changed the timing belt on my car. It wasn't due yet, but I have had a front main seal leak that makes everything quite messy for 50,000 miles or so. We changed the belt (which was saturated in oil and a bit loose because of it), cam seals, and of course the crank seal. When we put it back together it was making a noise similar to a bad idler pulley bearing. It just had a not-so-subtle whine to it. We figured it was the crank plate behind the crank sprocket, since we didn't have replacement parts for those handy and the plate got a little bent while trying to get it and the sprocket off of there. The noise had progressively gotten worse, so today I tore everything apart again.

There were some metal shavings from the crank plate rubbing on the sprocket, which again was thought to be the cause of the noise. I replaced the plate, the sprocket, the belt, and the tensioner (just in case it had something to do with the noise). After putting it back together I can say there is no change in the noise, it is still loud, and I have no idea what is causing it.

Obviously it has something to do with the timing belt (yes, I am sure it is not coming from any of the accessories). I am now completely out of ideas and pretty pissed that a day of crawling under the car and probably $100 between belts, tensioners, and misc. tools has resulted in no change.

Anyone else ever had this happen? What the hell is causing this noise?

11-29-2008, 06:43 PM	#1
maxitech I Has Pushrods! '93 White GXE Join Date: Oct 2004 Location: Houston, TX iTrader: (7) Posts: 3,055	Odd Noise After Timing Belt Job A couple of weeks ago Matt and I changed the timing belt on my car. It wasn't due yet, but I have had a front main seal leak that makes everything quite messy for 50,000 miles or so. We changed the belt (which was saturated in oil and a bit loose because of it), cam seals, and of course the crank seal. When we put it back together it was making a noise similar to a bad idler pulley bearing. It just had a not-so-subtle whine to it. We figured it was the crank plate behind the crank sprocket, since we didn't have replacement parts for those handy and the plate got a little bent while trying to get it and the sprocket off of there. The noise had progressively gotten worse, so today I tore everything apart again. There were some metal shavings from the crank plate rubbing on the sprocket, which again was thought to be the cause of the noise. I replaced the plate, the sprocket, the belt, and the tensioner (just in case it had something to do with the noise). After putting it back together I can say there is no change in the noise, it is still loud, and I have no idea what is causing it. Obviously it has something to do with the timing belt (yes, I am sure it is not coming from any of the accessories). I am now completely out of ideas and pretty pissed that a day of crawling under the car and probably $100 between belts, tensioners, and misc. tools has resulted in no change. Anyone else ever had this happen? What the hell is causing this noise? __________________ MODS: VLSD 5-Speed Swap, Exedy Stage 1 Clutch, Turbo Manifold Studs, Koni/Eibach Suspension, Suspension Techniques F & R Swaybars w/ Blehmco RSB Links, Unorthodox Racing UDP, Blehmco Grounding Kit, WSP Y-Pipe, Place Racing CAI, Custom STS, Polyurethane Front & Rear Bushings, Q45 Front Brakes (Blehmco S.S. Lines, Brembo Rotors, Axxis Metal Master Pads), Courtesy Nissan FSTB, Blehmco RSTB, Blehmco Stage II LTB, NissanWorks TB & IACV Spacers, 9007 Headlight Bulb Conversion, GXE Fog Lamps, Sound System (Infinity, JVC, Polk, MTX), 2k3 SE 17" Wheels w/ 225/50R17 Hankook HR Ventus II Tires - 186K miles (bought 8/03 @ 87K miles) Other Toy: '96 Corvette LT4 6-Speed, 75K miles (bought 3/09 @ 60K miles), Black on Black, Fassstt!!!! Stock, for now...