PeachParts Mercedes-Benz Forum - engine rocking 1983 300TD

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Quote:

Originally posted by psfred
Mike:

........

Also, check the visco clutch on the fan. Should lock the fan at slightly above 80C, causing it to roar -- if you shut the engine off hot (90C), the fan should stop immediately (less than one turn) -- if it spins, the visco clutch is shot, replace it.

I...............

Peter

The clutch starts engaging between 90 to 95C. The temperature I am talking about is the clutch temperature, NOT the engine. I posted detailed test steps to test the clutch in the following link:

http://www.peachparts.com/shopforum/diesel-discussion/7346-clutch-fan-300d-124-a.html?highlight=clutch

David

Mike:

100C isn't out of spec, but I'd not be happy. My 300E goes up to 80C in traffic, but I've not yet replaced the bad visco clutch (sitting on the dining room table!).

The fan moves a LOT of air -- you should be able to hear the roar while driving, or a whine that sounds like a small jet. Fan speed locked up should be at least 1200 rpm, and that is a fairly aggressive blade configuration!

Peter