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Car Forum / GMC Cars / December 20051998 3800 Tensioner Pulley
I had a '98 Grand Prix 3800 (190,000kms) come to me today with a torn up tensioner pulley. Looks like the bearing seized, heated up, melted the plastic pulley. Replacement is a steel pulley with the same bearing. This is the first tensioner pulley I've seen torn up. How common is this in everyone else's neck of the woods? Steve I'm on my first GM with the serpentine belt. 89 S-10 Blazer, with 260K miles. I've had to replace the idler (plastic pulley, just disappeared one day) and the spring loaded tensioner. When I replaced the idler, I took the junkyard unit apart, and relubed it. Can't remember what I used. The tensioner locked up, and was squealing and being awful. The replacement didn't look much like the one I took off, but it has been working nicely. I oiled that one, also. Just one man's experiences, but it's consistent with what you're seeing. Them things lock up, and make a mess.  SignatureChristopher A. Young Do good work. It's longer in the short run but shorter in the long run. . . I had a '98 Grand Prix 3800 (190,000kms) come to me today with a torn up tensioner pulley. Looks like the bearing seized, heated up, melted the plastic pulley. Replacement is a steel pulley with the same bearing. This is the first tensioner pulley I've seen torn up. How common is this in everyone else's neck of the woods? Steve I replace the tensioner on my LTZ 3800, about every 18 months, bearing gets noisey, both NAPA and AZ do the same thing. >I had a '98 Grand Prix 3800 (190,000kms) come to me today with a torn up >tensioner pulley. Looks like the bearing seized, heated up, melted the [quoted text clipped - 4 lines] > > Steve Do you slap em in dry, or do you lubricate them some how? SignatureChristopher A. Young You can't shout down a troll. You have to starve them. . I replace the tensioner on my LTZ 3800, about every 18 months, bearing gets noisey, both NAPA and AZ do the same thing. > Do you slap em in dry, or do you lubricate them some how? The bearing is lubed at the bearing manufacturer, they are not dry. I don't have a lot of confidence in factory lube. SignatureChristopher A. Young You can't shout down a troll. You have to starve them. . > Do you slap em in dry, or do you lubricate them some how? The bearing is lubed at the bearing manufacturer, they are not dry. >I don't have a lot of confidence in factory lube. I don't know what to say to that. I've been using 'sealed for life' bearings from NTN, SFK and FAG for as long as I've been working and never had any problems or lack of confidence in them, and I'm not talking $20 idler pulleys, I'm talking million dollar conveyor systems. To lube these bearings you need to remove the seal, which usually damages it thus allowing dirt and water into the bearing, lowering it's life. Not sure if you want to take advise from a Mechanical Engineering Technologist, but I'd just leave the bearings as they come from the manufacturer. Steve > from NTN, SFK and FAG for as long as I've been working and never had any That's SKF, not SFK. > Do you slap em in dry, or do you lubricate them some how? They are factory sealed. Mine probably would have gone 200k or 300k miles if I had not broke it by prying on it with a 3 foot crowbar. Hasn't happened to me yet & I got almost 305,000 miles om mine. LOL ! Harryface 05 Park Avenue, 32,839 91 Bonneville LE 304,991 |
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