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Originally Posted by blueranger
if you dont need an oil cooler then put in a bypass filter....honestly with 8 qts of oil none of us probably need an oil cooler... except maybe the folks in arizona...if your doing biodiesel or vegie oil you could use those lines to warm the veggie oil with...
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from blueranger.
Drive around town (Or even the highway) for an hour or so. Don't flog it, just drive. Then pop the hood and put your hand on the oil cooler. I'd bet you $20 it's too hot to hold your hand on for very long.
The pistons are cooled directly by oil (With squirters). They perform a MAJOR part in keeping our turbo engines from melting. Yes, the 240D is not turbo. But the germans spent booku duetchmarks to make sure that these things have what they need to survive in the real world. If it has an oil cooler, it's there for a reason.
Also, look at the oil flow diagram (specifically of the filter housing) and you will see an oil thermostat in there. At a set temp (I believe around 220*f) that thermostat runs ALL the oil through the cooler. If you put a bypass filter in place of the cooler, you would starve the engine of oil once it gets warm.