Oil Cooler

F

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Joined
Mar 25, 2005
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16749
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1993 Mercruiser 454 carb engines. Oil out exhaust loss of oil in crank. I am quessing oil cooler. How hard to change and where is it located. Need help Thanks guys.
 
No, I first thought it was raw gas coming out of the exhaust. Then noticed low oil pressure, shut of engine, checked oil which was low but appeared clean. Thank for help!
 
If you have remote oil filters, follow a hose from the filter to the oil cooler. Can also follow hoses from transmission to the cooler. You can also follow the raw water hose from the raw water pump to the oil cooler. I thought if the oil cooler was bad, you would have water in the oil, not just oil out the exhaust?
 
thanks greg. I did not notice any water but had about a half an inch of oil showing on dip stick. I quess I should change what ever oil is left ?
 
Follow the incoming raw water hose and you should find the oil cooler. I would change the oil as a precaution.
 
You're welcome. I have to believe if you had a failed cooler, you'd see water in your crankcase oil.
 
Oil pressure is higher than the vacuum side of the raw water intake.[:P]

The coolers are usually 2" diameter. You may have 2 separate ones(power steering and engine...even tranny)

Follow the oil lines to what system is being cooled.
 
I could be wrong, but I thought he was asking about a Merc, not a Crusader. All the old Mercs I am familiar with usually had the coolers tucked away under the engine. They are a tube about 2"X9" not U shaped.
Al
 
yup your right i was thinking crusaders when a cooler fails the oil goes to the water side never water in the oil as the pressure of the oil is greater
 
Yes it was the oil cooler and I did have water in the oil. Changed cooler, oil and filter. I ran the engine for ten min. and changed the oil again. It all seens good. Thank for all the advise it was very helpful. Frank
 
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