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extd56 · 09-01-2009, 12:21 AM

I installed a 1991 Suburban motor in my 69 crew cab truck and put in Autometer gauges. I am having a problem with the temperature gauge reading hot. I had the sending unit in the right head and the gauge was showing that it is running 210 in the driveway but when I took it out on the freeway it went up to 250. I moved the sending unit to the thermostat housing and now it reads 180.00 all the time. Can the sending unit next to the exhaust make a differance in the reading? I am running a Edelbrock reverse flow water pump and a be cool radiator and it seems like it is running cool but I am worried about the reading from the head.

09-01-2009, 12:21 AM	#1
extd56 Senior Member Join Date: Nov 2004 Location: Vacaville, CA Posts: 2,272	1991 Suburban 454 heat issues I installed a 1991 Suburban motor in my 69 crew cab truck and put in Autometer gauges. I am having a problem with the temperature gauge reading hot. I had the sending unit in the right head and the gauge was showing that it is running 210 in the driveway but when I took it out on the freeway it went up to 250. I moved the sending unit to the thermostat housing and now it reads 180.00 all the time. Can the sending unit next to the exhaust make a differance in the reading? I am running a Edelbrock reverse flow water pump and a be cool radiator and it seems like it is running cool but I am worried about the reading from the head.