Quote:
Originally Posted by wprater
Hi,
I'm concerned that my large Setrab 172 center-mounted cooler is keeping my oil temps too low. This is driving around in 60-70°F ambient temperatures in city or spirited canyon driving.
I studied how the auxiliary t-stat works and replaced my internals of the t-stat as well. I was concerned it was forced open. Now I'm concluding that the cooler is too efficient and I need to block off portions
Im getting about 155 F max at the lines to the entrance of the external t-stat now. I'm worried about continuing running the engine hard at these temps and I cannot get them any higher.
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I’m confused because I would have figured that a working thermostat would only allow oil to flow to the cooler when the oil temperature reached 190°. Are you looking to block off the cooler as part of your troubleshooting?
If the line to the cooler is at a temperature less than 190° I’d blame the thermostat because it’s my understanding that oil should return to the tank without going to the filter unless the oil is >190°
Do the lines after the thermostat going to the filter measure 155°? What is the temperature of the return oil?
Does the engine mounted temperature sender agree that the oil is only getting to 155°?
I’ve got factory coolers including a 3.2 front fender cooler with stock thermostats and I’ve driven on days with below freezing temperatures. The gauge always indicates temperature in the 180 to 190 range