Quote:
Originally Posted by nhdoc
The MB stat I removed would spike over 100C and drop to under 80 during routine running...that's just wrong. The new Wahler behaves normally, the car warms up and the temp stays steady. These gauges are pretty accurate if they're working right, and this one is.
A car which runs at 90C+ is above its design temp. When new, these cars ran at just above 80C...a car running at 95C-105C means either the gauge is wrong or the engine is running warm. 80-85C is not cool...it's normal for these.
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The SD has a brand new
OE thermostat........Wahler.
It runs at 82-85C. when it's below 2000 rpm with a light load.
It runs at 90C. when at 2800 rpm at highway speeds.
It runs at 95-98C. when at highway speeds at maximum power (held for more than 30 seconds). It very slowly returns toward 90C. after 10-15 minutes.
I've checked the cylinder head and confirm that the head runs about 7C. cooler than the gauge.
Therefore, don't draw any firm conclusions on the capability of a 617 to maintain a perfect temperature under all conditions.
The 606 may be different.