Oil leaking everywhere--8V92

[Red Hatt]

8v92 engine oil preasure gauge pegged. I went down to the engine room and oil was coming out of the dipstick an lots of gaskets. Other than to much oil in the engine what would cause this ?? Do you think the engine is toast? The water temp was fine. Any idea's???

 

[Timeout]

Last fall, on one of my 671N's, a bolt on the rocker arm assembly broke and when the assembly lifted up it broke a fuel line which caused about 20 gallons of diesel oil to enter the crankcase and escape everywhere. I thought it was a massive oil leak at first. The whole engine room was black oil mixed with diesel fuel. Really did a nice job of cleaning the inside of the engine.

... Kevin

 

[MikeP]

Sounds like the oil pump relief valve didn't relieve.

Too much oil in the engine would cause some of the symptoms but it would NOT peg the oil pressure gauge. The only thing that can cause oil pressure in the oil galleries, where the pressure sensor is located, is the oil pump. So I'd suggest that something has clogged/jammed the oil pressure relief valve in the pump, causing it not to lift at the spec oil pressure. I don't know what that is in a 671, in our 8v71TIs it is around 50PSI.

Some oil pumps have an external manual adjustment for oil pressure...does yours and did someone fool with it?

 

[captddis]

A little more info would help. How high is the crankcase level after everything has settled? Is there fuel or coolant in the oil? Was the oil press confirmed with a manual gauge? How were you running when this occured?

You might have high crankcase pressure. Does the engine sound normal?

 

[MikeP]

Good point about the oil press gauge - I made an ASSUMPTION that the gauge being pegged was correctly reading system oil pressure but of course, the gauge could have been in error. Overfilling would account for all the symptoms except high oil pressure.

High blowby will also shove oil and the dipstick out of the tube...

 

[Red Hatt]

The engine was running about 1100 rpms and both gauge's were pegged and that when I went in the engine room and saw the oil coming out of the dip stick and other gaskets. I checked the oil level later after cool down and the stick showed the oil down about 2 quarts no water or fuel in the oil.

 

[captddis]

I would hook up a manual gauge and remove the oil filler cap and start, check oil press and check for excessive blowby as well. That will be a start.

 

[Genesis]

Check excessive blowby first.

While the oil pressure control valve (in the oil pump) CAN jam, its darn uncommon. Unfortunately most (but not all) of the things that can do this sort of thing - if its crankcase overpressurization to that degree - are really bad news.

If both oil gauges pegged (both engines) but only one was misbehaving odds are that's electrical. Do you have mechanical gauges in the engine room?

 

[Red Hatt]

It turns out that the boat yard had worked on the stab. and hooked one of the hoses wrong because the Stab. run off the engine with the high oil preasure. Problem solved.

 

[MikeP]

Ahhh...as Paul Harvey used to say, "..the REST of the story!"

 

[captddis]

It turns out that the boat yard had worked on the stab. and hooked one of the hoses wrong because the Stab. run off the engine with the high oil preasure. Problem solved.

If it is fixed that is good, but it does not make sense. The hyd pump for the stabs is on the back of the engine and it has a suction hose that usually is clamped on to the pump and has a pressure line that has a swivel fitting. No way to confuse them and if the press hose got connected to the engine oil gallery, it would be getting around 1200 PSI. which would be very bad.

 

[stormchaser]

I assume said shop is doing a free oil change (in case of contamination) or at least topping up your oil AND having the engine/engine room/bilge cleaned and detailed at no cost to you? We all make mistakes...and as long as the yard takes responsibility and does the right thing...no problem.

 

[Red Hatt]

The boat yard has steppped up to the plate to make the repairs. I had another mech. check also formy pease of mind. After they have made the repairs that engine will be tested for a while make sure everything is O.K. It was a well none boat yard that has been in around for a long long time. Who knows these days what kind of work comes out of the boat yards!!! It's really sad how much you pay for first class work and what you end up getting.

 

[jim rosenthal]

Good for them...anyone can make a mistake, but after they make it (and cop to it) they ought to step up and fix the problem and clean up the mess. Glad it was nothing worse than that. ..