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CATMAN c12 engine. low oil pressure. oil looks thin and

CATMAN c12 engine. low oil pressure...
CATMAN
c12 engine. low oil pressure . oil looks thin and runny,. i suspect fuel . but all injectors are testing OK on CAT et
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Answered in 11 minutes by:
2/26/2019
Technician: Cat Man, Cat Engine Expert replied 3 years ago
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
Experience: I am ASE Master Truck Certified.
Verified
Thanks for asking you question. I will try and help you out.
If there is fuel in the oil. It’s most likely coming from an injector. I see this a lot. An injector can leak fuel and still pass a cutout test.
If the injectors are not leaking. It’s either the fuel pump or a cracked head.Please reply back if you need more help. I am happy to assist.
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Customer reply replied 3 years ago
i had a low oil pressure logged event occur 41 times. right now. sitting 2 days, cold idle its reading 34 psi on cat et. oil level is not rising on dpistick so kind of rules out fuel right
Technician: Cat Man, Cat Engine Expert replied 3 years ago
Correct. Normally when fuel is entering the oil. The level will rise.
If there is no fuel in the oil. You may have worn rod and main bearings, weak oil pump, or relief valve in oil filter housing open.
Please reply back if you need more help. I am happy to assist.
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Customer reply replied 3 years ago
how many labor hours can i charge to roll rods and mains bearings
Technician: Cat Man, Cat Engine Expert replied 3 years ago
It can take 6-7 hours to do.
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Customer reply replied 3 years ago
whats the easist way to roll them bearings. i know sometimes some go in smooth and you can push the upper one in by hand but sometimes some are really hard to push up
Technician: Cat Man, Cat Engine Expert replied 3 years ago
sometimes they are hard. I like to losses the fan belts. That helps the top one go in easier.
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
Experience: I am ASE Master Truck Certified.
Verified
Cat Man and 87 other Medium and Heavy Trucks Specialists are ready to help you
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Customer reply replied 3 years ago
where is the oil psi sending unit. and what should the oil psi specs be on this engine ?
Technician: Cat Man, Cat Engine Expert replied 3 years ago
Oil pressure sensor is on drivers side in front of ecm. Minimum pressure hit at idle is 10 psi.
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