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Where is it leaking coolant?

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2001 Suburban Loosing Coolant

3956 Views 48 Replies 10 Participants Last post by  Magicianelectrician, 
bazar01
Got a message on the DIC "Low Coolant". It has 290k miles. WP replaced around 150k miles. Radiator, hoses and connectors are original. Reservoir level is very low. I saw coolant dripping at the back of the engine oil pan under cover. Probably dripping on the under cover and running down the back.
I'm going to park it for a while until I can find time to investigate as I am going out of town for a few weeks.
Any guesses?
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OpalLacod
Heater core plastic hose connector at the firewall for the cheap win!!!
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OpalLacod
Apparently this never posted...

The one I'm tackling today on the 04 Burb is the water pump gasket. Pump less than a year old, so user (me) error.

Update: Turned out to actually be the water pump... Installed new gaskets. Leak was more visible with truck on incline. New water pump and another set of gaskets. 🤦‍♀️

Other update: Original pump. Had changed my own on the Silverado, not the Suburban.
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OpalLacod
wdc1 said:
Thank you. Great pictures also.
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I thought I had taken more pictures of that beautiful, shiny, new water pump down there, but I guess I only thought about it. Optimal photography lighting provided by a 4ft fluorescent light fixture hanging from the hood above our heads. 🙃
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OpalLacod
The Duralast Gold I just installed was Lifetime and new, not remanufactured.
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OpalLacod
bazar01 said:
Only local auto parts store from now on for easy replacement of defective parts like this.
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I got burned on sway bar bushings that came in a kit with new end links and some other things. They had the wrong diameter hole... By the time I figured it out, I couldn't send it back to RA. Ordered some new ones. 🤷‍♂️
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OpalLacod
Brenden16 said:
OpalLacod the handyman, getting those hands dirty! 👀
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For the record, that's my father. He held up the water pump while I put in the gaskets and bolts. I was too short to reach over the brush guard.

I'm also much prettier. 🤣
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OpalLacod
I had to argue with mine (04 Burb) for about a month to get the leak to stop. The rings inside wouldn't seat right. Make sure there is only 1 in there.
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OpalLacod
bazar01 said:
Haha. Was it hard to pull the plastic tee fitting?
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Not once you learn the stroke. Push, squeeze, pull. Should pop on and off easy peasy with no tools. Same attachment method as the supply line, just on a T.
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