Progress up date-the Engine Runs for the 1st time after rebuild
http://www.canadianmilitarypattern.c...9th%202011.wmv . Not bad sounding if I do say so myself, no exhaust pipe, timing not dialed in yet, pulling 17-18 inches, oil pressure at start 42 PSI. No clanking little valve noise but clearances were set with the engine at room temperature just as a starting point. Prelubed the oil system with drill and heated the block with a block heater to 110 before starting.
Only issue noted was a drop in oil pressure at idle once engine had equalized at 180F. This I suspect is because of missing restriction orifice in the filter system. See more photos (
http://www.canadianmilitarypattern.c...20December.htm )
Problem is with the T fitting coming out of the block for the filter and oil pressure gauge, original has a restriction orifice in the line to the filter. Has anybody else found one of these. I replace the fitting for two reasons one I could not get it back in position because of the through block oil line. The other was that this same fitting on my Pattern 12 failed early in testing that engine and it emptied the crankcase very quickly.
I plan to run the engine some more to see if it drops below the 15 PSI I saw once the engine was up to temperature at idle. Plan then to put an restriction orifice, with the same size hole as the original,in the supply line to the filter and see if that changes the pressure drop once the engine oil is up to temperature.
More to follow
Cheers Phil