OIL PRESSURE

[sid]

I AM NOT FAMILAR WITH THE CUMMINS. On my truck the oil pressure staysin the first section sometimes at the top line and other times barely above the bottom line. Is this normal or am I runing the engine? Also the alternator fluctuates between all of the lines but does not go beyond them, is it normal/// what is normal?

[oldestof11]

Hook up a mechanical oil pressure gauge. The stock ones I have been told are worthless. Haven't had a problem yet with mine though.

Jon

[Begle1]

The oil pressure is normal. The only oil supply problems I've ever heard of on a Cummins involve Fram oil filters disintegrating; I don't think there's any reason to worry about it.

The voltage is normal-ish if something is drawing a heavy load on the battery. Typically the grid heaters on the intake will cycle for the first few miles on a cold day, and that'll really throw around the ammeter. Otherwise I don't know what'd make it bounce around in normal operation. Could be a sign of a bad battery, or perhaps a bad voltage regulator. Although in my experience voltage regulator failures are more dramatic.

[PToombs]

Could also be a bad ground under the dash. This would make both act funny.