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MEP-803A Oil Pressure

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Browning1

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I have notice that after the genset warms up to operating temp. the oil pressure goes for 40 psi to 20-22 psi. I am running Rotella 15w-40 engine oil and engine oil is up to the fill mark on dipstick. I understand it will drop in pressure if engine is brought down to idle but I would think it would stay a 35-40psi the whole time engine is running. Is this a sign that the oil pump is on the way out?
 
Light in the Dark

Light in the Dark

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You should note an oil pressure drop as the viscosity lessens under normal operating temperature. The LOP switch trips at 15+/-3 PSI. As this engine has a mechanical oil pump, if the engines running... the oil is flowing.

If your Rotella is semi-syn, realize this engine is spec'd to run regular conventional... so I would expect a lower running PSI with better, more modern oil.
 
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Browning1

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27
31
13
Location
Hertford, NC
Light in the Dark said:
You should note an oil pressure drop as the viscosity lessens under normal operating temperature. The LOP switch trips at 15+/-3 PSI. As this engine has a mechanical oil pump, if the engines running... the oil is flowing.

If your Rotella is semi-syn, realize this engine is spec'd to run regular conventional... so I would expect a lower running PSI with better, more modern oil.
Click to expand...
I use conventional Rotella in all my diesel engines.
 
Light in the Dark

Light in the Dark

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Browning1 said:
I use conventional Rotella in all my diesel engines.
Click to expand...
If you are concerned, many (myself included) have added a tee and a mechanical oil pressure gauge right behind the LOP switch. Its a good bit of redundancy to the factory gauge.

Installed Mechanical Oil Pressure Gauge on MEP-803A

Curiosity got the better of me on the oil pressure gauge accuracy. I've been wanting to flush and change oil and decided to add a mechanical oil pressure gauge. I drained the unit, refilled with ATF, and ran it up to temp with no load. Drained again and refilled with Motorcraft 15W40 Diesel...
www.steelsoldiers.com
 
B

Browning1

Member
27
31
13
Location
Hertford, NC
Light in the Dark said:
If you are concerned, many (myself included) have added a tee and a mechanical oil pressure gauge right behind the LOP switch. Its a good bit of redundancy to the factory gauge.

Installed Mechanical Oil Pressure Gauge on MEP-803A

Curiosity got the better of me on the oil pressure gauge accuracy. I've been wanting to flush and change oil and decided to add a mechanical oil pressure gauge. I drained the unit, refilled with ATF, and ran it up to temp with no load. Drained again and refilled with Motorcraft 15W40 Diesel...
www.steelsoldiers.com
Click to expand...
Thanks
 
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