Wanted: Bren carrier oil cooler thermostat

[Petr Brezina]

Paul, its not a thermostat, its a relief valve.

[paul visser]

oeps, yes its a valve. Thank's Petr

[Lynn Eades]

Or a Bypass valve. It lets the oil bypass the cooler when the oil is cold and thick. The valve is set with a 2.5 psi differential, without going to the manual.

[Glen Plumridge]

General info question.

Can you run the oil through the cooler circuit without that bypass valve being in place?

Not an easy part to find.

[Lynn Eades]

Yes, I believe you could because the oil is different today. I say that with reservation because the type of oil multigrade versus mono and the choice of grade and climate will have a bearing.
Important: You need to make sure everything is in order so that you get an oil flow. at the in and out ports.

[Glen Plumridge]

Being in Australia means my oil will never get cold and thick, so that's a plus.

Worth putting the oil pressure sender onto the input side of the oil flow from the cooler then I reckon. Just to keep a closer eye on it.

[Lynn Eades]

Glen, What sort of carrier do you have? The English and Canadian carriers use a fitting that directs a percentage of the oil to the cooler and lets some continue through the block galleries, while the Australian carriers have a plug screwed into the block in the cross drilling that makes the full flow of oil go through the cooler (or the bypass valve) The difference is in the fittings that screw into the block. The CTL7142 fitting is the restrictor in the riveted carrier engines