I was driving home last evening when the motor suddenly died, no noise or warning. I coasted to a stop and checked out the engine. Pulled the cover off the timing belt thinking the belt broke, but it was intact and still with tension. When I cranked over the engine, everything moved except the belt and valve cams. I trailered the car home and went to work today. What could have happened? Did it shear off a pin on the drive pulley or shaft where the timing belt connects to? The engine turns over freely, and didn't hear anything break. Any ideas appreciated.
Bill9091
More likely you ripped the teeth off the timing belt on the crank gear, pull the timing cover off and check the bottom.
I work on Volkswagens and Audis, and in the past 6 months I have personally seen 4 motors fail via cam locking in the cylinder head. If a low enough oil pressure is maintained then it happens on those cars. The 1.8t's have major oiling issues. Just a thought since he said his cams arent moving and the starter is turning the bottom end. If the cams were locked in place, the crank sproket would shred the teeth on the belt.. Probably not the case, but trying to be helpful here.
Well, I have the next couple days off work and going to take off the timing cover and hopefull discover what actually happened. Appreciate all your replys and advice. I'll let you know what I find. I also hope the valves aren't destroyed, but thats probably wishfull thinking. I am using as a guide "camshaft timing belt replacement /adjustment" by Tom Stangl that I found. Here is the link http://vfaq.com/mods/timingbelt-1G.html
my friend had the same problem with his integra tonight.. i pulled the valve cover to find the intake cam seized up... the belt was shredded around the camshaft sprocket
You were right! I pulled the timing cover off and the belt was shredded around the camshaft sprocket. I also found the tensioner failed as the pin was bent outward and not under the tensioner pulley arm. This caused lack of tension on the timing belt and probably slipped and destroyed the valves and froze the belt shredding the teeth at the sprocket. When I took the valve cover off I found the exhaust valves were toast as the rockers were lying the oil well and valves stuck. The cams didn't freeze due to lack of oil and I always had good oil pressure. The intake valves didn't appear to be damaged as they were intact and in place. Don't know why, but not complaining. I'll replace those valves and damaged parts and get it running again. I really love the car, performance and great gas mileage, but mostly drive it to work and other running around.
great gas milage? damn wish my dsm had that.. anyways, i dont know what else besides oil, or lack of, would cause a cam to seize up.. was there alot of crusted oil, or a funny smell in there? check the cams, are they a blueish color from being to hot?
Burnett03 said:
Good call, I was jsut about to post the same.
SignTist.
PS. I can't beleive it, but I guess you see alot more issues when it's more centralized. My shop has more of a domestic line up and we've got some really loyal customers. I guess with so much PM on these cars (that we work on) we'd be workin on the oil blockage or wahthaveyou before it came down to locking cams.
I've personally seen cams seized in quite a few cars, even a small block chevy. It happens way more often in engines without bearings though. Also i've seen a handfull of timing belts tear the teeth off and not break just the same.
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