Oil pressure on Volvo D13 Engine

wallance · Feb 24, 2018

nax said: ↑

@wallance
Thank you for your reply,sir.
Actually, I did add 1 gallon Lucas when I change oil last time and run 10,000 miles already then oil pressure drop down to 30.
Today,when I change new oil,the shop said there is no need to add lucas because the engine oil looks like watery.

Please advise.Need lucas or no?Completely confused.Thank you !

I see you tried to ask a question within the quote. Let me respond (I know you are stressing, so bear with me)

You said:

"I just change the fresh engine oil.Now oil pressure looks good at 60"

"Because the shop said my old engine oil looks like water...."

The "watery" oil is exactly what's happening to my oil.

I put 25Qts of Rotella and 4Qts of LUCAS OIL Conditioner. <----- This is to thicken the oil, because it will THIN out once fuel gets into it.

When I do this, my oil pressure stays at 70psi at start-up and is at 60-65psi for the first 500-800 miles (40-45 at cruise). After 1200 miles it starts to hover around 60psi at start-up and last time I tried to push it to 2500 miles, the oil buzzer/shutdown message came on.

I strongly suggest you grab a few gallons of LUCAS OIL from Walmart asap. to slow down the dilution.
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wallance · Feb 24, 2018

Thank you so much for your advice! But could you judge what is the really reason for the low oil pressure? I want to fix the problem totally.My truck will go from CA -AL tomorrow.

wallance · Feb 24, 2018

nax said: ↑

If cooler is leaking (coolant?) would the oil not be milky???

Oil pressure drop will slow down with LUCAS OIL ....try it. but dump the oil first and put fresh oil+lucas

Remember, the 3 oil filters take 2QTS each or total 6Qts, so account for that when changing oil, and you may want to put less than the full amount required for oil change.

My truck takes 37qts to dipstick max line. I put 30qts (since I know it will rise)
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Thank you so much for your advice! But could you judge what is the really reason for the low oil pressure? I want to fix the problem totally.My truck will go from CA -AL tomorrow.

nax · Feb 24, 2018

Thin oil = low pressure <---- IN MY TRUCK.

only way is to do a pressure test and trace where there's a leak in the fueling system.

Since fuel is moving from its normal environment into crankcase, conclusion is that there's a leak somewhere, before it gets into the cylinder.

A dye test and pressure test will tell you and it will involve removing the top cover.

2hr effort by a competent mechanic will answer that.

wallance · Feb 24, 2018

nax said: ↑

Thin oil = low pressure <---- IN MY TRUCK.

only way is to do a pressure test and trace where there's a leak in the fueling system.

Since fuel is moving from its normal environment into crankcase, conclusion is that there's a leak somewhere, before it gets into the cylinder.

A dye test and pressure test will tell you and it will involve removing the top cover.

2hr effort by a competent mechanic will answer that.
Click to expand...

After two nights， my fresh engine oil become more and coolant decrease a lot.That means my coolant leaking so fast! Any fast way to check where is leaking? I am going to drive 2000 miles this afternoon to AL.
I WORRY MY ENGINE SHUT DOWN ANYTIME.

wallance · Feb 24, 2018

wallance said: ↑

After two nights， my fresh engine oil become more and coolant decrease a lot.That means my coolant leaking so fast! Any fast way to check where is leaking? I am going to drive 2000 miles this afternoon to AL.
I WORRY MY ENGINE SHUT DOWN ANYTIME.
Click to expand...

It the problem of radiator or Cylinder gasket ?

nax · Feb 24, 2018

what color is the oil when you check with a dipstick?

are you seeing white smoke coming out of the exhaust?

wallance · Feb 24, 2018

oil is the color like normal and not see the white smoke.

wallance · Feb 25, 2018

nax said: ↑

Thin oil = low pressure <---- IN MY TRUCK.

only way is to do a pressure test and trace where there's a leak in the fueling system.

Since fuel is moving from its normal environment into crankcase, conclusion is that there's a leak somewhere, before it gets into the cylinder.

A dye test and pressure test will tell you and it will involve removing the top cover.

2hr effort by a competent mechanic will answer that.
Click to expand...

1000 miles has been driven, now on the way to AL.But oil pressure drop drown to 31~32.No warning come up yet.
Should I go to dealer? They will take few days to fix it.
Please advise.

AModelCat · Feb 25, 2018

If the oil isn't milky, you probably have fuel getting in the oil. You should take an oil sample to confirm. No point in chasing a coolant leak if its fuel dillution. You have a lot more balls than I to run a truck that long with that issue. You're playing Russian Roullette with a loaded gun with that engine. Cross your fingers you haven't wiped out the cam or crank bearings.

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