Question about Cars & Trucks
Unit came to me with intermitant temp light on , now the temp light stays on even if the machine is overnight cold, i replaced the temp sensor in the water inlet housing on the cylinder head , and still the light comes on ,and the engine is not overheating, i tested the temp of the engine with a infrared temp gun temp of the motor never went above 170 degrees . that is after 30 mins. of hard running, never got hot enough to turn on the cooling fan, but the darn temp light stays on.
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Posted on Jan 02, 2017
SOURCE: Cooling fan wont work
The water temp sensor is located near the thermostat housing. This sensor is what tells the ECM to turn the fan on/off. The water temp sending unit is located near the same area. You know you have the correct sensor is because the water temp sensor has a 2 prong plug. The water temp sending unit only has 1 prong.
Posted on Sep 27, 2008
the relays control circuit is grounded by ECM (computer) . to check this make sure the is hot enough for the fans to be commanded on by computer and check to see if you have voltage at relay and it has ground from computer . you may need ECM.
Posted on Jan 28, 2009
my husband did everything that everyone else did that had this overheating problem. It was so weird that my engine cooled at a light and heated up going down the road. I have a north star 4.6 engine and this is natorious for happening. my check engine light also came on and so I had a diagnostics done which told me my #1 injector wasn't firing , car ran like **** as well. After putting in a new water pump and plugs,ect. and realized injector was good a friend told him we could have a blown head gasket. So just to see if this was the problem I went to buy a bottle of glassbeads and the auto parts guy told us to purchase a bottle of BARS STOP LEAK BLOCK SEALER NOT RADIATOR BUT BLOCK SEALER $31.99 . He followed the directions and we waited 24 hrs. before driving it. What ever the problem was has stopped my car runs like brand new and I am loving it again. no over heating no injector problem, runs great.......I hope this helps. I know its probly a temperary fix but its a fix and now we know what the problem was. SASSY
Posted on Mar 19, 2009
u need to buy the special coolant to your car i have the same car whit the same problem and is cause to the incorrent cooland the cooland to your car is the DEX-COOL if u dont find that u need some hit (silicate-free)
Posted on Apr 29, 2009
Assuming engine tune / mechanical condition is not the cause of the overheating:-
Ensure cooling fan is cutting in at the appropriate engine temperature - check operation of the fan controlling relay,
Ensure fan switching control temperature sensor is serviceable,
Ensure cooling system is filled properly, taking care to bleed out air where necessary,
Ensure coolant pressure cap is of correct rating and in serviceable condition,
Check coolant hose on suction side of waterpump is not softened and collapsing at engine revs above idle,
Ensure radiator core is not blocked or cooling airflow inhibited by insects etc.
Posted on Aug 11, 2009
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