Leaking coolant

Hi,

The upper hose attaches to the thermostat housing. See pic 1 below. And yes, there is a gasket. However, if there is a repair that looks like jb weld or other product, it sounds like there was a crack in the housing,

Do me a favor. Take a pic of it so I can see what you are dealing with and upload it for me to see.

If you can't, try to remove the "weld" product. I can't be sure, but chances are it's there to repair a crack or damage to the housing.

Let me know what you find or if you have other questions.

Take care and God Bless,

Joe

Hi,

It looks like something melted. If that is something like JB Weld, I can't imagine it is repairable. Try to remove some of that. It may be difficult.

I have to be honest with you. I have a feeling the best thing to do would be to replace the thermostat housing. That is your call at this point. If that is all a "cold weld" product, it had to be seriously damaged.

Try to get that off. As I said, it may be really difficult. If it is, remove the housing and replace it. However, make sure you can find one first. You may have to get one from a salvage yard. I don't know if this one is made aftermarket.

Here are the directions. The pics attached below correlate with the directions.

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2002 Chevy Truck Tracker 4WD V6-2.5L VIN 4
Thermostat Housing Replacement
Vehicle Engine, Cooling and Exhaust Cooling System Thermostat Housing Service and Repair Removal and Replacement Thermostat Housing Replacement
THERMOSTAT HOUSING REPLACEMENT
Thermostat Housing Replacement (2.5L Engine)

Removal Procedure

pic 1

1. Drain the engine coolant.
2. Remove the intake manifold.
3. Remove the radiator inlet hose.
4. Remove the radiator outlet hose.
5. Remove the heater hose (1) from the thermostat housing (2).

Pic 2

6. Remove the bypass hoses (1).

Pic 3

7. Remove the thermostat housing bolts (1) and the thermostat housing (2).

Installation Procedure

pic 4

Notice: Refer to Fastener Notice in Service Precautions.

1. Install the thermostat housing (2) and the thermostat housing bolts (1).
- Tighten the thermostat housing bolts to 45 Nm (33 ft. Lbs.).

Pic 5

2. Install the bypass hoses (1).

Pic 6

3. Install the heater hose (1) to the thermostat housing (2).
4. Install the radiator outlet hose.
5. Install the radiator inlet hose.
6. Install the intake manifold.
7. Refill the engine coolant.

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Let me know if this helps and what you find. Also, let me know if you have questions or if there is something I can do to help.

Take care,
Joe

Good evening,

Can you please upload the picture to this post so I can see what was done?

https://www.2carpros.com/articles/car-is-leaking-coolant

Roy

Okay, it could be a hose or a loose clamp.

The best way to check is to pressure test the system and look for the leak. That will narrow it down. You can rent a tester at a parts store.

https://www.2carpros.com/articles/radiator-pressure-test

Roy