Oil temp high
#12
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lake st.clair,,,where i boat,,,
i was running high temps 260ish,,,machine shop didnt seem to think it was too hot,
but had to pull motors to address water pump changes, i updated oil coolers with big
CPH-700 Thermostatically Controlled Cooler 3 inch bundle,from mr cool
now motors run 200 -230
i was running high temps 260ish,,,machine shop didnt seem to think it was too hot,
but had to pull motors to address water pump changes, i updated oil coolers with big
CPH-700 Thermostatically Controlled Cooler 3 inch bundle,from mr cool
now motors run 200 -230
#13
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Any idea how much a high volume oil pump may raise oil temps , compared to the std oil pump??
I have a stock 1998 415hp 502mpi just with Eddie Marine exhaust and some advanced timing at WOT to 36 deg.
I like simpler the better. I am trying to run without all the remote filter setup, oil cooler, hoses, which adds weight and takes up room, and potential leak spots. Often hearing these stock motors dont need the high volume pump, just the standard unit.
I'm hoping that with doing a couple other things like lower the timing a couple degrees, and checking for lean AFR, that i can run without a cooler/remote filter setup.
Oil temps running a little high, 280F cruising just under wot.
I like the oil a little hot to keep the oil as dry as possible. Would like around 250max running hard, over 200 cruising easy.
I have a stock 1998 415hp 502mpi just with Eddie Marine exhaust and some advanced timing at WOT to 36 deg.
I like simpler the better. I am trying to run without all the remote filter setup, oil cooler, hoses, which adds weight and takes up room, and potential leak spots. Often hearing these stock motors dont need the high volume pump, just the standard unit.
I'm hoping that with doing a couple other things like lower the timing a couple degrees, and checking for lean AFR, that i can run without a cooler/remote filter setup.
Oil temps running a little high, 280F cruising just under wot.
I like the oil a little hot to keep the oil as dry as possible. Would like around 250max running hard, over 200 cruising easy.
Last edited by Cap'm Kurt; 04-10-2020 at 03:02 PM.
#14
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lake st.clair,,,where i boat,,,
i was running high temps 260ish,,,machine shop didnt seem to think it was too hot,
but had to pull motors to address water pump changes, i updated oil coolers with big
CPH-700 Thermostatically Controlled Cooler 3 inch bundle,from mr cool
now motors run 200 -230
i was running high temps 260ish,,,machine shop didnt seem to think it was too hot,
but had to pull motors to address water pump changes, i updated oil coolers with big
CPH-700 Thermostatically Controlled Cooler 3 inch bundle,from mr cool
now motors run 200 -230
#16
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I am having the same issue with hot oil, I have cleaned coolers and replaced water pump. I too am starting to believe it is the actual size of the cooler. I run the same 20-50 oil but if i run with or without an oil thermostat installed, my temps are climbing to 280 on a 4000 rpm run for 15 mins. Im not trying to hyjack your tread but have been battling this since i got the boat last year. No thermostat in engine with a cross over and never see my water temp gauge move. Took a test ride today in 45* water and after 30 mins still saw 280 on the gauge. Im going to measure my oil cooler tomorrow. What size did you end up going with? Never had any problem with the engine but still concerning when your oil temps rocket, water pressure is considerable low at 5 psi while cruising and then not seeing any water temp. Hard to really tell condition of what is happening. Im assuming the low water pressure has to due with the fact of not running a thermostat with the crossover, but worried about adding restrictors in housing to boost pressure and then have my oil get even hotter with less flow of water.
#17
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I am having the same issue with hot oil, I have cleaned coolers and replaced water pump. I too am starting to believe it is the actual size of the cooler. I run the same 20-50 oil but if i run with or without an oil thermostat installed, my temps are climbing to 280 on a 4000 rpm run for 15 mins. Im not trying to hyjack your tread but have been battling this since i got the boat last year. No thermostat in engine with a cross over and never see my water temp gauge move. Took a test ride today in 45* water and after 30 mins still saw 280 on the gauge. Im going to measure my oil cooler tomorrow. What size did you end up going with? Never had any problem with the engine but still concerning when your oil temps rocket, water pressure is considerable low at 5 psi while cruising and then not seeing any water temp. Hard to really tell condition of what is happening. Im assuming the low water pressure has to due with the fact of not running a thermostat with the crossover, but worried about adding restrictors in housing to boost pressure and then have my oil get even hotter with less flow of water.
#18
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do these and be done with it, if you get it wrong it's only your motor.
https://www.hardin-marine.com/p-1097...ing-mount.aspx
https://www.hardin-marine.com/p-1097...rmostatic.aspx
https://www.hardin-marine.com/p-1097...ing-mount.aspx
https://www.hardin-marine.com/p-1097...rmostatic.aspx
#19
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#20
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You need minimum 3x18" CPH-550, CPH-700 if you want thermostat. Russ usually gives an OSO discount.
https://www.mrcool.us/coolers/hi-per...e-coolers.html
https://www.mrcool.us/coolers/hi-per...e-coolers.html
Last edited by Rookie; 04-12-2020 at 07:54 PM.