QuestionRogher, I believe that the gauge I have is mechanical, has the tube and the bulb directly into the gauge.I have a 180 thermostat in there now, but it still runs at 210 to 230 on the highway, but as soon as I get to surface streets, it drops to 180. What kind of risk do I run?
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Followup To
Question -
As It says, I have a 72 GMC Suburban, new target 350 motor, dual electric fans (2 speed), new radiator, new thermostat, auto-gage mechanical temp gauge.
Since I bought the truck 2 years ago, temp readings high, never seemed to boil over but constantly running in the 230 and up range. Replaced motor, radiator,originally using dash gauge, but bought auto gauge. Even with all this I am still constantly at 210 and above (as high as 240 on the gauge)on the highway If I am just cruising in town, then stays at 180. Secondary fan kicks on at 180. I took it into the radiator shop, they said it didn't feel that hot, it wasn't boiling over, but I am concerned. Could it be that the sensor which is now in the water neck but was originally in the block on the drivers side just behind the manifold, is not reading properly? I cannot get the bulb into the original spot.I originally had the stock electric sensor in the block/manifold. Any thoughts?
Answer -
TONY ;
HI - well it could be the sensor , but you say it will not over heat on you , how is the thermastat , you can put in a new 180 or lower and see what it does , but if you are not over heating with steam ,than it might be the gauge , also how is the rad. cap? if the hoses are all good and the rad. is good and you are not overheating I would try a mech. temp gauge. they do not lie.
Answer HI ;
I would still change or you can even take the thermastat out for the summer , thats what I would do , as you are holding the hi temp. with out boiling over ,if it has been doing it all along than it might be the gauge but to be on the safe side I would just remove the thermastat for the summer than you will not have to worry about anything overheating,etc. ok
