Severe coolant leak!
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Freshman User
Joined: Nov 2013
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Severe coolant leak!
I put a new thermostat in my truck and then I went to fill the radiator with antifreeze. All of the coolant I put into the radiator is just pouring out!(must have been dry when I got it, which explains it running hot
) It seems to be coming from the upper area of the engine, but I'm not too sure on that. I'll be going back out to look at it in the morning but I really have no clue where it is coming from. 
All help is appreciated. 1994 F150 5.0L
) It seems to be coming from the upper area of the engine, but I'm not too sure on that. I'll be going back out to look at it in the morning but I really have no clue where it is coming from. All help is appreciated. 1994 F150 5.0L
Fleet Mechanic
Joined: Jan 2013
Posts: 1,305
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did you use a gasket ?
rtv sealant will work just fine if you dont have a gasket .
just use water until you find out why it is leaking ( but dont leave plain water in there overnight if it's still cold where you are).
rtv sealant will work just fine if you dont have a gasket .
just use water until you find out why it is leaking ( but dont leave plain water in there overnight if it's still cold where you are).
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So I found the leak. I guess when I was tightening the thermostat housing, the thermostat slipped out of place and the gasket didn't seal. I couldn't see where the leak was at the time because it was dark. I got a new gasket and I put some waterproof sealant and everything is cool now. It stays in the NORMAL zone. 
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