amateur_diy
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- Joined
- September 24, 2016
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- Year, Model & Trim Level
- 1999 Explorer 5.0 AWD XLT
New to the forum. I live up North and am trying my best to winterize my car before the snow starts. For a year now, I have noticed that my coolant level drops in my explorer very quickly. Last winter I had to fill it up with one entire jug of radiator fluid every 3-4 weeks. A year later, my engine will lose it every 300 miles and has overheated twice and now I fill it up every week or week and a half. When overheated, the temperature indicator went to H and then I heard a loud clicking noise. I fill it up with a jug of coolant, and it doesn't overheat.
I pressure tested the system cold last week. I found multiple leaks.
first leak: either next to or on top of the water pump (see video and pictures)
second leak: underneath water pump and above heater core. Multiple hoses possibly?
third and fourth leaks (majority of coolant loss): dripping from the drivetrain (see video) and other piece of equipment next to drivetrain.
So far my hypothesis from reading other forums, a lot of googling, and reading the haynes manual: freeze plugs between the drive train and engine, hoses near the heater core, gasket issues. My engine also has a block heater, so this might also be a possible coolant leaking area.
If anyone has suggestions for either diagnosis or solutions I am all ears! I can also take more pictures/video if you would like to see the engine at a different angle.
I pressure tested the system cold last week. I found multiple leaks.
first leak: either next to or on top of the water pump (see video and pictures)
second leak: underneath water pump and above heater core. Multiple hoses possibly?
third and fourth leaks (majority of coolant loss): dripping from the drivetrain (see video) and other piece of equipment next to drivetrain.
So far my hypothesis from reading other forums, a lot of googling, and reading the haynes manual: freeze plugs between the drive train and engine, hoses near the heater core, gasket issues. My engine also has a block heater, so this might also be a possible coolant leaking area.
If anyone has suggestions for either diagnosis or solutions I am all ears! I can also take more pictures/video if you would like to see the engine at a different angle.