6 bt 5.9 330hp low oil pressure

[chasintail]

330 hp cummins 8500 hrs 20 lb oil pressure. runs good. what do you think guys 2000 dollar ...thank you :roll:

 

[Duke]

More info needed.

Is the 20 psi at idle or cruise, warm or cold? I would confirm the oil pressure gauge is reading correctly. Maybe rig a direct reading gauge on the block if one if one is not already there. 2k is short money if it is running okay.

 

[MDI45]

It was tested with a gauge....25 cold...but thin old oil....owner does not wanna use the motor so he is not putting a oil change into it....i ran the boat from R.I. down......what are your plains for this motor.rebuild?

 

[chasintail]

Is the 20 psi at idle or cruise, warm or cold? I would confirm the oil pressure gauge is reading correctly. Maybe rig a direct reading gauge on the block if one if one is not already there. 2k is short money if it is running okay.

20 cruise warm thanks

 

[chasintail]

It was tested with a gauge....25 cold...but thin old oil....owner does not wanna use the motor so he is not putting a oil change into it....i ran the boat from R.I. down......what are your plains for this motor.rebuild?

run it hard! thanks

 

[BillD]

It was tested with a gauge....25 cold...but thin old oil....owner does not wanna use the motor so he is not putting a oil change into it....i ran the boat from R.I. down......what are your plains for this motor.rebuild?[/QUOTE

Two points. The 6Bs are not known to have low oil pressures.. 12-15 psi @ idle hot is not unusual. If the gauge is reading 20 psi @ cruise rpms warm I'd be suspicious of the oil pressure sender and or gauge.

The 6Bs ARE known to be sensitive to too much oil and it's best to run 12-13 qts. MAX in the oil pan of 15w-40w with a Fleetguard oil filter changing every 100-150 hrs.

FWIW,

Bill D