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flaresideman
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Vehicle: 1992 f150 flareside
Joined: Jan 2008
Member # 3931
From: fl
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Tom in Tacoma
Moderator
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Vehicle: Truck? What truck?
Joined: May 2005
Member # 9
From: Over yonder WA
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 Posted
- November 24 2008 : 9:35p
| | Either the water pump or the fan clutch. | |
Mort
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Vehicle: 2006 OshKosh S-Series 6x6
Joined: May 2005
Member # 86
From: Mortville WA
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Posted
- November 25 2008 : 10:08a
| I would try to hook up a mechanical temperature gauge to it, and see if that is accurate. If it shoots back down right when you take your foot off the pedal, I'd almost suspect the gauge. You can buy a cheapo autogauge or some store brand at Pep Boys for pretty cheap.
If the water pump isn't leaking, it probably isn't the water pump. A leak is how the pump tells you it is broken. | |
flaresideman
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Vehicle: 1992 f150 flareside
Joined: Jan 2008
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From: fl
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Posted
- November 25 2008 : 8:46p
| | do u think it could be the temp sending unit i think that what u call it | |
Mort
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Vehicle: 2006 OshKosh S-Series 6x6
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From: Mortville WA
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Posted
- November 25 2008 : 9:26p
| | Its possible. If its cheap, you may try that first. | |
ShowYa
Supercharged Member
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Vehicle: Beat Up Pickup & 06 Pony
Joined: Jan 2006
Member # 513
From: Snow Town Snowy K.C.
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Posted
- November 25 2008 : 9:33p
| | Sending unit, wiring, make sure it has proper ground for age of vehicle mentioned here. | |
Gentleman Jack
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Vehicle: 07 R* Midnight Silverado
Joined: Jul 2006
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From: Seattle Washington
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Posted
- November 29 2008 : 12:49p
| Sounds like air underneath the thermostat. The air is being heated showing a normal temp condition (since temp sensors are typically located in that region), when you rev the engine it compresses the air and hot coolant comes up. Let off, the water level subsides.
Since air is a poor conductor of heat, it won't allow the stat to open.
Just a thought.. | |
97F1504RAD
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Vehicle: 1997 F-150/ 2006 Mustang
Joined: May 2005
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From: Nor Cal CA.
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Posted
- December 1 2008 : 7:52p
| 1. Check the water pump flow to make sure somehow the impeller is not damaged. The simplest way to do this is to remove either heater hose and start the engine. Water should flow out of the engine with good strong force. If not, pull the water pump and check for a problem.
2. If the water pump is flowing, check for a restricted radiator. With the thermostat open, the temperature drop across a radiator will typically be 20-30*F. If there is a significantly greater temperature drop from one side of the radiator to the other, suspect a restriction.
3. If the radiator is OK, check for combustion gas in the cooling system. If found, repair the leaking head gaskets or damaged head(s).
1. Inspect the A/C condenser core and radiator for obstructions, such as leaves or dirt.
2. Check the radiator cap to ensure that it holds pressure.
3. If OK, use either a cylinder leakage tester or a chemical kit to determine if there are head gasket issues or internal engine coolant leaks.
4. If no internal leakage is found, check for a defective water pump impeller that is not circulating the coolant very well at higher engine RPM speeds.
5. If no other problems are found, remove the radiator and have it flow tested by a radiator shop. | |
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please help overheating
