have you verified the temp with an IR thermometer?

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Actually at that milage I would include a injection pump timing check. More heat might be developed with late timing. I would check the chain as well for excess stretch. I wonder what kind of fuel milage that car is delivering.

Also a thermal check for cold spots in the rad when it is at temperature as well. Especially if turning the heater on drops the temperature.


Actually with a cast iron head and block the temperature it is running at is not a major issue. .My kind of rule is if it never boils over I seldom would get really concerned. If you have a fluid coupled fan makes sure it passes a simple test. Cast iron heads are far more tolerant of running a little hotter. I was sorry to see them go out of production on most cars.

Yes but where is the best place to get a reading?

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83 300CD- sanden, dual p/f condensers, 160a alternator, ect
91 300TD- 722.6, #22 head, 3.5L IP, w140 manifolds, ect

Point it at the thermostat housing and all over the top of the radiator. Shoot the upper radiator hose and the lower radiator hose. By doing this a few times, you should eventually get a story about the temperature.

Dkr.