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Author Topic: Temperature reading ?  (Read 2154 times)

Offline Big cheese

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Temperature reading ?
« on: January 24, 2011, 09:33:10 pm »
oki have a guage on my truck and on a hot day the temp usually only gets up to 150  was wondering is there anyway to test the guage or the sender it has the wire that clips onto the block right buy the headers driver side how can i test this because i dont think my tuck runs that cld just want to be sure thanks.oh its a 350tbi with factory guage               
87 gmc by Big cheeser, on Flickr
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Offline zieg85

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    • 73-87 GM squarebody extended cab and conversions up to 91 R/V series
Re: Temperature reading ?
« Reply #1 on: January 24, 2011, 09:46:17 pm »
Open the petcock on the radiator and drain about a gallon out.  Take the upper radiator hose at the engine where the thermostat is.  My guess is it is either not in there or stuck open.  That would be a good place to start.  

If the truck has good heat your sending unit may be the culprit.  
« Last Edit: January 24, 2011, 10:12:03 pm by Captkaos »
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Carl 
1985 C20 Scottsdale 7.4L 4 speed 3.21
1986 C10 under construction
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Offline Big cheese

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Re: Temperature reading ?
« Reply #2 on: January 25, 2011, 07:03:22 pm »
I recently just changed the thermostat to a t stat that opens at 180 thanks still not to sure thinking the wire needs better contact on the sender going to take a wire brush to the both this weekend .I do know im getting some kind of reading because i di sconnect it and it goes to zero or all the way to the left  ???
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