timing chain ?
#1
timing chain ?
If I can move the crank pulley about 1/8 in+ back and forth, does that mean the chain is stretched? Truck has 88,000 miles now. I pulled hard on the belt from below and was able to move the damper/ crank pulley about 2inches counter clockwise looking from the front. I don't know if that's normal either?
#3
Doesn't sound abnormal to me - you can sometimes turn the motor by hand via the crank pulley with some decent effort. Not a good test for the timing chain, however, with that mileage and age, I'd be checking the plenum gasket (if it hasn't already been done) and plan on a timing chain and gear set replacement if you plan on keeping the truck awhile.
#4
#6
Doesn't sound abnormal to me - you can sometimes turn the motor by hand via the crank pulley with some decent effort. Not a good test for the timing chain, however, with that mileage and age, I'd be checking the plenum gasket (if it hasn't already been done) and plan on a timing chain and gear set replacement if you plan on keeping the truck awhile.
#7
When you pull your balancer to change the timing chain and gears, check the balancer closely to ensure the rubber hasn't deteriorated, especially since you had a badly leaking front cover seal. If the rubber has deteriorated badly, the balancer will need to be rebuilt or replaced, as this can cause balance issues if its spinning on the hub.
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#8
I wish it was the HB, but it appears to be in quite good shape. And the slight miss stumble while at idle only, is quite temperature dependent. Was driving me nuts late last summer into the fall. When temps dropped it was barely noticeable, it loved subzero days. This week is the first time we have hit 40 degrees and it's driving me nuts again. I am hoping it's the plenum leak that's causing that issue, extra air entering from the crank case, and it just opens up more when it's warmer out. We'll see!
Last edited by ReadRam; 03-11-2014 at 12:18 PM.