higer oil temp after rebuild, bypass??
#13
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Totally agree with what Borgie is saying here and especially about the Schumman oil pumps as they do oil pumps all day long. They also are doing some cool stuff for oil pumps on the LS engines as well.
I took a class that they put on last year and it was very informative as to how they are improving stock oil pumps along with some of their own designs. A lot of info about internal pressure spikes within the oil pump itself that want to combat. Anyways they have been around a very long time.
I took a class that they put on last year and it was very informative as to how they are improving stock oil pumps along with some of their own designs. A lot of info about internal pressure spikes within the oil pump itself that want to combat. Anyways they have been around a very long time.
#15
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Also make sure water flow is still running opposite of oil flow in coolers, besides that I would look at 11lb valve issues.. make sure 30lb valve is used, if not sure then just replace it anyway with one....how much time is on it Ron? before he runs it again for the 10.00, cut the oil filter open and make sure that's all good and there isn't a reason for hot oil.....
#16
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another suggestion would be to make sure Teflon tape was NOT used on the oil temp sender
they are designed to be installed dry. the sensor needs a good connection from the block to work properly.
they are designed to be installed dry. the sensor needs a good connection from the block to work properly.
#17
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Have a friend with twin 500EFIs. One was rebuild top to bottom this past winter, the other got a top end fresh. Now oil temp is 50+ degrees different, not off the charts but different. He is running in real cold water (Great Lakes) 52 degrees. Oil temps on hot engine runs 190 to 230 and climbing when running hard. Cool engine 150 to 180 running hard. Water temp is exactly the same, exactly.
If not gauge or sender, could be the oil t-stat.
#18
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When properly setup, oil temp should ,reach max temperature and stay there until the boat runs out of gas. it should not continue to climb into the danger zone.
I would have to agree with checking the sending unit for proper ground, along with the oil temp gauge for proper ground to start. Sounds like you covered the basics with the impeller and water flow. The thermostat element can be changed, i wanna say they are about 30 bucks or so. Bad thing is I think on the 500EFI the element is in the block adapter, which would totally suck accessing to swap it out i would think.
That element should be fully opening allowing full flow to the cooler, around 210*. They dont start opening till around 180-190. If its not electrical, could very well be the element simply isnt opening, and never allowing full flow to the cooler. In the cold water we boat in, I wouldnt be surprised if that engine isnt seeing 190-230 running without an oil cooler (stuck oil thermostat).
I would have to agree with checking the sending unit for proper ground, along with the oil temp gauge for proper ground to start. Sounds like you covered the basics with the impeller and water flow. The thermostat element can be changed, i wanna say they are about 30 bucks or so. Bad thing is I think on the 500EFI the element is in the block adapter, which would totally suck accessing to swap it out i would think.
That element should be fully opening allowing full flow to the cooler, around 210*. They dont start opening till around 180-190. If its not electrical, could very well be the element simply isnt opening, and never allowing full flow to the cooler. In the cold water we boat in, I wouldnt be surprised if that engine isnt seeing 190-230 running without an oil cooler (stuck oil thermostat).
#19
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Mr Forbus, I have tested the element before in a pot of water and recorded the temp/movement of the element. That test is 2 years old and going off my memory. I have a brand new mercury 8161631 element here on my desk. I will retest now, and report back. Stay tuned.
Update. Oven thermometer wasnt working. Attempted dissassembly. Metal housing on thermometer sliced thumb open, blood everywhere. Thumb not looking good. Hurts. Wrapped in gauze. Looking for new thermometer.
Update. Oven thermometer wasnt working. Attempted dissassembly. Metal housing on thermometer sliced thumb open, blood everywhere. Thumb not looking good. Hurts. Wrapped in gauze. Looking for new thermometer.
Last edited by MILD THUNDER; 07-01-2014 at 08:02 PM.
#20
Registered
Mr Forbus, I have tested the element before in a pot of water and recorded the temp/movement of the element. That test is 2 years old and going off my memory. I have a brand new mercury 8161631 element here on my desk. I will retest now, and report back. Stay tuned.
Update. Oven thermometer wasnt working. Attempted dissassembly. Metal housing on thermometer sliced thumb open, blood everywhere. Thumb not looking good. Hurts. Wrapped in gauze. Looking for new thermometer.
Update. Oven thermometer wasnt working. Attempted dissassembly. Metal housing on thermometer sliced thumb open, blood everywhere. Thumb not looking good. Hurts. Wrapped in gauze. Looking for new thermometer.