Hi all, I have a 97 EVC with about 125,000 miles that has run a bit hot since I have been checking it. The Scanguage says the? operating temperature is closer to 200 and up to 210 or even 220 when pushed, higher then the 183-186 reading I had on the two previous Eurovans I? owned, though in both this Eurovan and previous ones the dash gauge has never shown anything abnormal since it is designed to stay at 'normal' between about 175-210.

Things I've done (and wanted to do anyway to refresh engine): new 80 degree C (176 F) thermostat, new 'crack' pipe and thermostat housing, new water pump, new coolant, new water temp sensor in water jacket, checked to make sure F18 coolant fan sensor in radiator was working correctly and fans turning on to low, medium and high speeds, replaced green resistors behind bumper and checked 2 50 amp fuses near relay block, swapped in new relay block, new radiator, and, since I was replacing the fuel injectors anyway, replaced the head gasket. No real change in temp readings. No CEL codes. I added a transmission oil cooler in front that keeps tranny temps down to 160s/170s. Might be related to coolant flow or radiator as when I turn up the heat to the heater core temp drops 10 degrees pretty quickly and generally stays down closer to 190-195. Also if I take out mechanical thermostat altogether it takes much longer to go to 210.? But new water pump and radiator have me scratching my head why that could be the case. Any ideas?

Mine runs the same temps ever since I installed the tranny cooler.? I think its just blocked/reduced air flow combined with the heat load of the transmission cooler.

By the time (less) air gets to the radiator, it is preheated by the cooler in front of it.??

I have seen that temps get far higher for VR6 motors in other vehicles that use that engine.

interesting point. I put the tranny cooler on as soon as I bought the van so I don't have a comparison to check it with prior to the installation. But a previous one I owned didn't seem to run hot. I'll play around with the tranny cooler and see if that indeed is the issue.

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Hi Ken,?

An additional factor is the bypass thermostat.? It will restrict the flow to the cooler somewhat and may cause the tranny to run a bit hotter but take some heat load off the radiator at the same time.? ?Mine has no thermostat so my engine runs a bit hotter and the tranny runs almost too cool.? Never seen the trany break 200 f since adding the cooler.