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Old 09-07-2012, 04:03 AM
TonkaRanger01 TonkaRanger01 is offline
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Default 4.0 l sohc thermostat housing

Ok so my thermostat housing started leaking about 2 years ago and I replaced the hole thing and thermostat but now it has started leaking again and it leaks on the motor so it smells horrible does anyone know of a stronger housing?
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Old 09-07-2012, 04:40 AM
01_ranger_4x4 01_ranger_4x4 is offline
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Default Re: 4.0 l sohc thermostat housing

Where is it leaking this time? Is the housing leaking or just the seal?
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Old 09-07-2012, 09:30 AM
TonkaRanger01 TonkaRanger01 is offline
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Default

The top of the housing
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Old 09-07-2012, 10:03 AM
Brenton59 Brenton59 is offline
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Default Re: 4.0 l sohc thermostat housing

God i hate that damn thing, such a pain to get to! Mine went a couple years ago as well, and i hope it never goes agian. I dont think that there is a better one, they all come that stupid platic housing.
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Old 09-08-2012, 08:13 PM
TonkaRanger01 TonkaRanger01 is offline
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Default Re: 4.0 l sohc thermostat housing

Well it ended up being the short 90 degree piece of hose that comes off the top of the housing and runs in the heater lines and i just took the whole intake manifold off to make it ten times easier to work on but i need to know if there is a way i can test my temp sensors before i put them back in the housing? does anyone know of a way to test them?
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Old 09-08-2012, 09:47 PM
DannMarr DannMarr is offline
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Default Re: 4.0 l sohc thermostat housing

Quote:
Originally Posted by TonkaRanger01 View Post
i need to know if there is a way i can test my temp sensors before i put them back in the housing? does anyone know of a way to test them?
If the sensor is bad it will trigger a trouble code and the check engine light will come on. symptoms related to a bad coolant temperature sensor:
1) Truck uses more fuel than usual
2) Have trouble starting at normal operating temperature
3) Black smoke out the exhaust

Ohms test: Connect the black lead of the meter to the body of the sensor and the red to the terminal. You should have a reading of approximately 2000 ohms when its cold and a lower reading when warm.
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Last edited by DannMarr; 09-08-2012 at 09:56 PM.
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