Anyone know whether there is a freeze plug located directly behind/under the passenger side motor mount on a 5.3L 2001 Yukon? And if so, what is the best way to remove & replace w/out removing engine? I have antifreeze on this motor mount & cannot determine a leak source. Any good way to confirm the freeze plug is source w/out removal of motor mount?
Engine Freeze plugs
- Thread starter rgg11
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I've heard of some mech's putting a dye in the antifeeze (or other fluid that is leaking) that "glows" under a blacklight to help determine the origin of a leak.
I've never done it myself though.... I've always cleaned things up, and then looked for the highest point of the "wetness". You know...gravity and all.
I've never done it myself though.... I've always cleaned things up, and then looked for the highest point of the "wetness". You know...gravity and all.
Hammer450R
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Water can run from anywhere so use a mirror and a light or even dry everything with paper towels, start the truck and run your finger around it and check to see if your finger is wet.
I would think that if it was leaking internally, you wouldn't be finding it on the motor mount. Has to be leaking "out" to get there.
domin8
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There is a dye made by FJC. It comes in a very small bottle of only a few ounces. It's very cheap to. If I were at work I could tell you the part number, but for now you'll have to settle with my memory. Iirc, the FJC number is something like 2536 or 2539. To be honest, I'm not exactly sure right now.
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