aux belt flapping
Posted: Sun Apr 28, 2013 2:59 pm
The missus' car is a bit unwell... Makes a right racket and the other week I eventually got round to putting new top engine mounts on. The old ones were torn to shreds, and I know the bottom one's in a sorry state - someone else is going to suffer changing that in a week's time...
So it went in for an MOT. Failed on the exhaust flexi-joint and the cat - no doubt a result of the engine bouncing around. So it's got new bits fitted and now it's got some right nasty vibrations under torque to the point the wife calls me cos she doesn't want to drive it. No problem I think - the bottom engine mount's still shot and the new bits are making it obvious. However, the (trustworthy) mechanic who does the stuff I can't be arsed (or back's too knackered) to do thinks it's due to the aux belt slapping around. He tells me to get on the ground and have a look
Lo and behold, the aux belt is slapping around everywhere between the aircon and crankshaft pulleys!!! I'm still positive the vibration on torque is due to the mount, but I can hear that the hideously loud diesel slappy noise the car has is actually the aux belt, and it's not good.
Had a closer look this afternoon, but I hate to say I can't say for sure what it is. The tensioner is bouncing around like mad, but I think that's a symptom rather than the cause as the pulley's fine and it springs back with vigour. The alternator pulley seems a little wobbly when hand-spun, but is perfectly still when the belt's on. The crankshaft pulley does seem a little wobbly when driven though, but not very. Everything else seems fine
I'm going to replace (or get it done by my mechanic when he does the bottom mount - HA! No wheelarch liner faffing for me!) the crankshaft pulley, as it's due replacement anyhow, and the year-old belt because it looks 10 years old due to this abuse, but does anyone have any other thoughts on this?
So it went in for an MOT. Failed on the exhaust flexi-joint and the cat - no doubt a result of the engine bouncing around. So it's got new bits fitted and now it's got some right nasty vibrations under torque to the point the wife calls me cos she doesn't want to drive it. No problem I think - the bottom engine mount's still shot and the new bits are making it obvious. However, the (trustworthy) mechanic who does the stuff I can't be arsed (or back's too knackered) to do thinks it's due to the aux belt slapping around. He tells me to get on the ground and have a look
Lo and behold, the aux belt is slapping around everywhere between the aircon and crankshaft pulleys!!! I'm still positive the vibration on torque is due to the mount, but I can hear that the hideously loud diesel slappy noise the car has is actually the aux belt, and it's not good.
Had a closer look this afternoon, but I hate to say I can't say for sure what it is. The tensioner is bouncing around like mad, but I think that's a symptom rather than the cause as the pulley's fine and it springs back with vigour. The alternator pulley seems a little wobbly when hand-spun, but is perfectly still when the belt's on. The crankshaft pulley does seem a little wobbly when driven though, but not very. Everything else seems fine
I'm going to replace (or get it done by my mechanic when he does the bottom mount - HA! No wheelarch liner faffing for me!) the crankshaft pulley, as it's due replacement anyhow, and the year-old belt because it looks 10 years old due to this abuse, but does anyone have any other thoughts on this?
