Quote:
Originally Posted by Diesel911
Not the timing chain but there is a little snap righ that wears on the Oil Pump Chain Tensioner. When that goes it is possible for the tensioner to jam up the oil pump drive.
You can get at it by way of small oil pan removal.
The green arrow points to the snap ring.
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Ditto, for those w/ an 82-85 turbo-diesel. I pulled the lower oil pan on my 1984 and found a bolt that mounts the oil pump sitting in the bottom, along w/ part of that black plastic guide rail. I recall the snap ring was still on the shaft. The guide rail had cracked at the pivot hole and was cocked upwards, dragging on the chain.
Others say you must remove the upper oil pan to replace the oil pump, which means engine out of vehicle, but I was able to remove it just thru the small oil pan. Besides the oil pump, you must also remove the front bearing block. Replace the O-rings on the oil pump outlet tube and check the bearing while in there. A new guide rail was cheap.