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Topic: Engine oil pressure (Read 1985 times) previous topic - next topic

Engine oil pressure

Just had the coach out for a 200 mile run up to Springfield, and noticed that my engine oil pressure is running around 32-35 psi at 1300 rpm.  Is this normal?  Also, when I turned my headlights on, the pressure dropped about 7 to 10 psi, and the engine water temp increased about 5 degrees.  Not sure what is going on here.
Mike

Mike Brady
'97 U320 SE. #5137
'13 Honda Fit
Willow Springs, MO

Re: Engine oil pressure

Reply #1 –
Is someone going to suggest bad ground wires?
Dave Cobb
Buckhorn Lake Resort The Club, #6202, Kerrville TX
check the map.  I do rent it out when I am traveling!
2001, U320, 36' #5887, in Kerrville, FT Club #17006, (7/23 to present)
2024 Jeep Grand Cherokee L, Summit, white
EX: 98 U295, 36' #5219, (mid door), (4/13-10/23)
EX: 93 U225, 36' (4/11 to 4/13)

Re: Engine oil pressure

Reply #2 –
M11 minimum at low idle is 10psi.  Minimum at 1200 RPM or at peak torque is 30psi.

Taken from the Cummings specs.

As for the gauge variations check ground first then make sure that the voltage is not dropping when lights turned on.

Keith
Keith, Joyce & Smokey the Australian Cattle Dog
1995 U320 SE Extreme 40' WTBI Build # 4780, with a Honda CR-V hopefully still following behind.
Motorcade # 17030
FMCA # F422159

Re: Engine oil pressure

Reply #3 –
Quote from: Yetch –
Just had the coach out for a 200 mile run up to Springfield, and noticed that my engine oil pressure is running around 32-35 psi at 1300 rpm.  Is this normal?  Also, when I turned my headlights on, the pressure dropped about 7 to 10 psi, and the engine water temp increased about 5 degrees.  Not sure what is going on here.
Mike

Normal except for the lighting drop.

My buddy tightened all the wires on the gauges back side on my #5132
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Engine oil pressure

Reply #4 –
Hi Mike,
  Our 1997 U 320 is real close to your readings. I thought the oil pressure was low. It is not. Our oil pressure drops 3 to 5 pounds with lights on, and water temp goes up a few degrees. The ground is not good. Ten plus years and it is still the same. Oil analysis have all been fine.
Raymond
Raymond & Babette Jordan
1997 U 320
1998 Ford Explorer XLT

Re: Engine oil pressure

Reply #5 –
I was going to but you beat me to it!!!

Yup, on my U-270, temp gauge was FLAKY!!!!! Â never did figure it out, bought VMSPC and stopped using the analog gauges. Â Funny, the U-320 always agree with the VMSPC -

So I think I had a ground issue - but loved the excuse to buy the VMSPC
Tim Fiedler    2025 LTV Unity MBL on Order
2000 Chevy Tracker 2 Door Convertible 4WD Now lifted 4.5"
1985 Citroen 2CV6 Charleston
Murphy Rebel on wheels with 175HP Titan
Cessna P337
1980 48' Westport MY (!/4 Share)

Re: Engine oil pressure

Reply #6 –
Thanks all for the replies.  Thought I had something major going on.
Mike
Mike Brady
'97 U320 SE. #5137
'13 Honda Fit
Willow Springs, MO

Re: Engine oil pressure

Reply #7 –
My 96 U320 runs 50-60 psi at highway speeds, and about 20 psi at idle when up to temp.  Cummins M11, 70,000 miles.  Yours is right in range with the cummins spec, no worries.
Current coach 1996 U320 40'
Previous coach, 1990 36' U280

Re: Engine oil pressure

Reply #8 –
Quote from: Kemahjohn –
My 96 U320 runs 50-60 psi at highway speeds, and about 20 psi at idle when up to temp.  Cummins M11, 70,000 miles.  Yours is right in range with the cummins spec, no worries.

Your gauge may be incorrectly displaying your oil pressure.  Almost double everyone else's.
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Engine oil pressure

Reply #9 –
Mine behaves very similarly and it always freaks me out but a computer hooked up to the engine itself shows oil pressure is much higher, near 38psi.

Re: Engine oil pressure

Reply #10 –
The 96 is new to us so the gauge could. Be reading high--- we found out the hard way that the fuel gauge sender was bad.  Just had the oil changed, will check it.
Current coach 1996 U320 40'
Previous coach, 1990 36' U280
 

Re: Engine oil pressure

Reply #11 –
In my opinion the range of the oil pressure gauge is to high for this engine. Most gauges are spec'd so the normal operating pressure is visually in a mid point on the number system. The fact that they choose a gauge that displays so low under normal conditions, it makes the operator weary. If I get around to it, I plan to change the gauge and sending unit to something more to that respect.
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