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04-15-2010, 03:33 PM
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#1 |
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Registered User
 Join Date: May 2009
Location: Burlington, NC
Posts: 49
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Water temp help!!!
I have a 72 lb 350 2wd just installed new temp sending unit in left side of head between plugs, my gauge seem to work but after about 15 min of driving it pegs to hot. Just to be safe I installed new water pump, thermostat, upper/lower hoses. still same problem gauge gets pegged to H.
I checked my other gauge set and it does the same thing, I have bypassed factory wires etc.. every possible combo i could think of. still no luck. Truck doesnt overheat, drives fine rest of gauges work ok. Its just an old truck and I'd like to know the water temp is okay. any suggestions BEFORE i install a separate gauge? |
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04-15-2010, 03:44 PM
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#2 |
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The Red Menace
Join Date: Feb 2009
Location: Roseburg, OR
Posts: 577
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Re: Water temp help!!!
It is possible you got a faulty sending unit. It's been known to happen. If the same thing is happening with two different gauges, and you are sure the truck isn't overheating, It might be the unit.
__________________
1971 Custom 10 - 350/350TH - Pwr steering, gauges, Chrome front bumper, Chrome hubcaps, Door edge guards, HD rear springs (current) 1968 C-20 Custom Camper - 350/350TH (orig 327), Pwr steering & brakes, gauges w/tach (former) 1968 C-20 - 307/3sp column (Dad's when I was a kid) "Driving is like coloring. Things get messy if you can't stay inside the lines." |
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04-15-2010, 04:19 PM
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#3 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Water temp help!!!
check the wire to see if it is melted and grounded to the motor that will cause the gauge to peg at hot
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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04-16-2010, 12:52 AM
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#4 |
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Registered User
Join Date: Dec 2007
Location: Southington CT
Posts: 548
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Re: Water temp help!!!
another thing to think about is air in the system, if a pocket of air gets trapped around the sending unit, the temps will climb quickly. Just to be safe I would get another complete gauge with sending unit and see what the new one reads.
A cheap sunpro from auto zone should work fine. |
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04-16-2010, 06:06 AM
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#5 |
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Registered User
Join Date: Aug 2009
Location: Lambertville MI
Posts: 962
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Re: Water temp help!!!
sounds like an air pocket to me
__________________
"I'll keep my guns, money, and freedom. You can keep the "change" |
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04-16-2010, 08:21 AM
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#6 |
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Registered User
Join Date: May 2009
Location: Burlington, NC
Posts: 49
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Re: Water temp help!!!
Thanks fellas! I flushed it out AGAIN and changed the sending unit, its working great now. so it was probably bad sending unit/air pocket or both.
always the simple sH*t that gets it everytime. |
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04-16-2010, 09:55 AM
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#7 |
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Registered User
Join Date: Feb 2010
Location: duluth mn
Posts: 108
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Re: Water temp help!!!
i have tryed 2 sending units and mine still reads hot. what brand did you use? there is a delco sender available for about $25 i may try next.
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04-22-2010, 10:00 AM
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#8 |
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Registered User
Join Date: May 2009
Location: Burlington, NC
Posts: 49
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Re: Water temp help!!!
Both of mine were Delco parts ACD G1852
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"I'm not here, and I ain't leavin" |
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04-22-2010, 10:18 AM
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#9 |
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Registered User
Join Date: Apr 2010
Location: Cape Coral, FL
Posts: 3
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Re: Water temp help!!!
put a thermometer in the radiator and check coolant temp. also it maybe possible the radiator clogged.
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04-22-2010, 03:52 PM
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#10 |
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Registered User
Join Date: Mar 2010
Location: San Jose, CA
Posts: 76
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Re: Water temp help!!!
I have the same issue even after 3 temp senders, new water pump, thermostat. I have added thread below to tie them together in case others have similar issues. I will update mine once resolved.
http://67-72chevytrucks.com/vboard/s...d.php?t=393670
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 Jay ----------------------------------- { 1972 Chevrolet C-10 Fleetside, 350 V8, 5.7L. } ----------------------------------- |
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