Thread: Inline Oil Coolers

That cooler should handle the oil pressure produced by the engine oil pump which should be no more than 80 psi at best. I don't know what the pressure relief is set at but I'd say that it would allow 60 psi so 80 is allowing a bit of a fudge factor. The efficacy of the cooler will be dependant on the airflow over it as the cooler requires air to take the heat away from the cooler's fins. Left to natural convection I doubt the cooler would make much difference however with a suitable amount of airflow the heat exchage to the air would improve. In order words the cooler will do if you can place it somewhere where there is good airflow.

thanks isuzu110
i have been wondering the same thing about this for a short while now. but just running an auto transmission cooler or some such thing just behind the grille (if there is any room)
looking forward to further ideas and comment on this subject

I had always assumed that the oil cooler in the radiator was about keeping the oil temp stable not just cool.
Is there a risk of over cooling if the system doesn't have a thermostat in it?

Tony

I live in SE Qld so am not too worried about the oil being too cool. I plan to still run the oil through the existing oil cooler post the inline air one. My aim is to reduce overall oil and water temperatures. Yes, somewhere the inline cooler gets plenty of airflow.

I took my oil cooler off my Nissan TD engine due to sludge. I was even told by a Nissan factory mechanic that Nissan South Africa discontinued use of the coolers : the core blocks up and then the oil pump simply bypasses it via the pressure release valve.

OK, granted that is with nice African 500PPM+ sulfur diesel, but anybody running "iffy" fuel or SVO should take note. I think depending on the design of the oil circuit you could suffer oil starvation.

Just a heads up: if you want to run a cooler, make sure the internal passages are nice and BIG. And I recommend you remove, clean and flush every 50,000kms or so.

I live in SE Qld so am not too worried about the oil being too cool

same here

how would a rangie tube type cooler go?

The P38A uses an air cooled radiator. It might be adaptable.





An RRC cooler may be cheaper and available from a wrecker.