Quote:
Originally Posted by vector1
i had an oil cooler on the front shoot craps, started leaking, luckily it was not pressurized oil into the engine but scavenge oil, don't know why, never did find out.
ant, could you explain the cold oil pressure wave? my dry sump would run 230 deg with 12 qts oil and no oil cooler street driving scavenge oil going directly into the tank, with cooler it was about 150 deg. driving around normally, will have to make a shield. |
When you start a dry sump engine there is potential for the oil cooler to fail due to a problem when the oil from the oil tank drains into the engine by gravity and the oil tank level can be high enough to cause a head, and on startup the scavenge sections suck an amount of cold oil from the oil pan and force it through the oil cooler, I have seen it on several F5000 etc race cars with blown oil coolers, scavenge oil can be harder on coolers than having the cooler on the pressure side. A way to fix this problem is a bypass valve before the cooler diverting the excess oil directly to the oil tank, or fit a thermostat so oil is diverted to either the oil tank or if on the pressure side to the main oil gallery without going through the cooler.