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« on: January 28, 2013, 05:07:22 PM »
Based on my sad experience , consider replacing that cam chain at 125k-150k or over regardless of how pretty it looks. Mine has 214k and the chain rollers started fracturing and ending up in the pan. These got sucked up into the oil pump and wrecked the pump and front timing housing. The rollers remaining on the chain still "look" fine. The chain guides are also full of hairline cracks and should have been done long ago too. Expensive parts, but cheaper than another motor.
This one ran really well up 'till it stopped oiling.
Lots of similar posts on this site too.
I'd also recommend a rear main seal while you've got it out.
When swapping these motors,
Beware the two possible M42 transmission pilot bearing sizes in the back end of the crank. some are 12mm some are 15mm, these can make you crazy if you mismatch.
Jim