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Old 02-17-2012, 02:13 PM
EDBSO EDBSO is offline
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Join Date: Aug 2006
Posts: 380
Replaced mine at 140,088 miles with a Behr. Still had the original housing so replaced that too.

Now the Behr is quick to heat to the first thermostat mark 60C but takes some 6 or 7 minutes to get to 80C but will maintain 80C in sub 0 weather. Will replace with a Wahler. I understand both brands have an excellent reputation.

I think I may have cooked it when the temperature went 3/4 of the way to the 100C mark while on cruise with the air blasting going up a 15 mile grade on Interstate 15. It was advised to turn off air conditioning at the base of the hill.

I have always had the belief that you could reach 100C before and damage was done and that a thermostat or engine and it would fail open at 120C. I suspect that I have a partial fail resulting in a fast opening. New Wahler thermostat ordered now if it would only warm up outside.
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1999 Mercedes E300TD daily driver sold at 238K miles 106K miles were mine, rust worm got it :-(
2006 Mercedes CDI new daily driver! 56,000 miles May 2016 now 85,625 April 2018.
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