Well, I did learn the hard way several years ago. A chap rebuilt Dad's AW-7 Diesel and it quickly spun a big end bearing and damaged the crankshaft. My own experience was having a Mercedes OM617 motor rebuilt. It is a three litre motor fitted to 300D cars. When I went to collect the car, complete with new pistons, sleeves, bearings, linished and crack-trested crankshaft, rebuilt camshaft etc. it was running horribly and blowing smoke. It turned out to have no power either. After some heated discussions, including explaining to the fellow that Mercedes Benz diesels are not designed to blow smoke unless turned off, I undertook the necessary corrections:
1: Retime valves - timing chain was fitted one tooth out on cam gear.
2: Fit new manifold studs - they damaged several of mine and fitted some from a Toyota landcruiser.
3: Fit the anti-vibration shock absorbers, which had been left off
4: Fit alternator support bracket - also left off.
5: Re-time injection pump as per Bosch and Mercedes-Benz instructions.
My time and extra parts cost me about $400.
However, there are some excellent diesel mechanics, who take due care and attention as well as understanding the motors they work on, so I am not totally disillusioned!
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Today's Featured Article - Tractor Profile: Farmall M - by Staff. H so that mountable implements were interchaneable. The Farmall M was most popular with large-acreage row-crop farmers. It was powered by either a high-compression gas engine or a distillate version with lower compression. Options included the Lift-All hydraulic system, a belt pulley, PTO, rubber tires, starter, lights and a swinging drawbar. It could be ordered in the high-crop, wide-front or tricycle configurations. The high-crop version was called a Model MV.
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