Posted by pete 23 on June 24, 2010 at 08:17:21 from (173.87.147.99):
In Reply to: 706 with d/282 posted by jack 101 6 on June 23, 2010 at 17:21:05:
They are not actually a low compression engine, 17 to one is pretty std for farm tractors. It is a pre-combustion chamber style there fore uses outward opening,low pressure injection nozzle which requires a lot of turbulence to burn properly. You do not have that much turbulence at cranking speed therefore you use the glow plug to help get combustion started. If compressin pressures are low due to wear you will never start well. Cranking speed is of utmost importance to get them going. Large batteries, large cables in good conditon and good starter. One will notice that the 282 has a rather lightly built block, crank, piston etc, and the reason is because it is a pre cup engine and the cup in the head absorbs much of the rapid pressure rise of combustion. Direct injection engines have a much heavier block and crank etc, but not because the ratio is higher as some are actually lower. They start fine if in shape and proper procedures are followed. Timing should be at one degree BTDC. Been there, done that many times.
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