oil cooler

[Timeless56]

Has anyone had an oil cooler fail on 8-92's?. Running at full cruise, start to lose oil presure, shut down engine, check oil and little or no oil in engine. Never heated up and shut down while still holding oil pressure but very low. Checked around engine & no oil anywhere. Oil was coming out exhaust. Sounds like failed oil cooler but won't no for sure until Monday morning.

 

[Timeless56]

By the way, I'm in Norfolk, VA if anyone has any suggestions on a good Detroit guy that is reasonable.

 

[Trojan]

Sounds more like you sucked a valve in. My friends 671 DD did the same thing. $14,000 EPA Clean up. Pushed all the oil out the exhaust. I hope not. Good luck.


BILL

 

[captddis]

Could be a few things, The oil cooler is usually on the jacket water side. When they fail you usually get oil in the coolant. I would check for a failed turbo. It can give your symptoms. Have seen it a few times.

 

[Genesis]

Yep - not normally an oil cooler failure, as those are cooled by the water jacket.

My money is on a turbo seal failure if the engine was otherwise running normally at the time. Things like a dropped valve are usually real obvious when they happen....

You can also have a seal failure in the blower or to the intake side of the turbo but those produce an oil-fed runaway. NOT fun at all, VERY obvious (lots of black smoke and the boat runs like crap when it happens) and you may not be able to shut it down until it runs out of oil and self-destructs.

 

[Timeless56]

Guys:

This is a external oil cooler that was added by Pat Dover of P & C. Pat did the rebuild four years ago. It is mounted on the outside of the engine right after the sea strainer. It is a Lemco part. It measures about 15" long and 5" in diameter. It has 2 7/8" diameter hose coming from the seastrainer and two 2" oil lines and then about a 2 1/2" outlet to the engine. I had to move the boat today. We filled the engine with oil and started very briefly. It shot up to 40lbs of pressures and did not smoke or heat up. We did get significant amounts of oil out the exhaust again. Shut down right away. Again, not a drop of oil in the engine room. Engine never heated up and sounds good????? No irregular smoke either??????

 

[Timeless56]

Checked coolant and no traces of oil.

 

[Genesis]

Pull the cooler, stick a REGULATED air supply on one of the oil supply lines with the other capped, dial it up to 60psi and immerse in a bucket full of water.

See bubbles? There's your answer.....

 

[Maynard Rupp]

Why not just install a water hose to bypass that cooler for now. If it is an aftermarket unit, I have to assume that many other boats don't have them. Do you really need it that badly?. Is the original DD system in place? I hate aftermarket stuff in general; too many problems just like you are having. The way the weather is up here, you may want to stay awhile in Norfolk anyway. It is doing the 40 day and 40 night cold rain thing in the great lakes now. God am I sick of this.

 

[Timeless56]

Replaced oil cooler today. Appears this was the problem. Pressure came right back up and no oil out the exhaust. It was an original installation from Covington in 1987. The port cooler was relaced just before I bought the boat and this was the original that went bad. Start heading north again on Thursday. Thanks for the imput guys!

 

[Trojan]

Good for You. I'm glad it was that easy. Good Luck heading north.




BILL