![]() If this engine were to be a 785 where should I look for the number. I know it is not the number but I found a 5 digit number on the bell housing. If I understand right the number should be under the driverside cylinder head next to the bell housing. Hello, sorry for the trouble but I am still having trouble finding the serial number. Good engine until they put a turbo on it. Consolidated Freightways had a bunch of them and they were also used in the 900 series Versatile farm tractor. ![]() Transport Inc's entire fleet was 4300 Mccormicks with 903's. We had millions of those things in our area. Are you sure this engine is a 903 and not a V8-785? I thought the 903's showed up around 69 or 70. If it was built in the 60's the serial number will be 6 digits. ![]() ![]() The serial number on the 903's was on the left side of the block as the engine would sit in the truck, stamped on a spot behind the cylinder head and just ahead of where the flywheel bolts to the block. Wouldnt have a clue where to look for the numbers, but hopefully someone has 903 info in one of their manuals.Īs far as the thermostat, 180 should be fine if you arent going to work it, might help seal the rings a little better too.When I started most Cummins that I saw were set up with 160 thermostats.Never really understood why, but I do know that running the short hills up here, they never dropped below 180 unless you were bobtailing in cold weather,lol.John Also what temperature thermostat would you recommend, it runs about 150 right now and I think that might be a little too low. Hello, was wondering if anyone could help me locate the serial number location on my 1966 V 903 cummins engine. ![]()
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