Freeze Plug Leak - Car Troubleshooting


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Freeze Plug Leak

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Guest
Anonymous Poster
bearfan359@aol.com

Mar 11, 2009, 6:16 PM

Post #1 of 3 (3823 views)

Freeze Plug Leak	Sign In

2002 GMC Sonoma, 4.3, 100,000 miles. My freeze plug leaks. How can I fix it, how much will it cost and what problems may it cause. Thank you.

Loren Champlain Sr
Veteran / Moderator
Loren Champlain Sr profile image

Mar 11, 2009, 6:25 PM

Post #2 of 3 (3821 views)

Re: Freeze Plug Leak	Sign In

First, the problem it will cause is loss of coolant. Loss of coolant will cause overheating. Ect., ect, ect.
You'll have to remove whatever is in the way of the freeze plug so that you can remove it and replace it. Freeze plugs leak, mainly, from rust on the inside. If one is leaking, the rest aren't far behind. It is expensive to replace them all, though. You'll have at least two, maybe three on each side of the block. The heads, generally, have one at the front and one at the rear. There are also at least one at the back of the block that requires transmission removal. Don't want to scare you, but it's not something that you can let go. I'd recommend that you flush the cooling system thouroughly first, then again after you replace the plugs before adding new GREEN coolant.
Loren
SW Washington

leevit2stever
Novice

Mar 11, 2009, 11:36 PM

Post #3 of 3 (3819 views)

Re: Freeze Plug Leak	Sign In

OK.....Im assuming that being a "Bearfan" means your from the Chicago area. Myself,having grown up as
a"South-Sider"

your no stranger to temperatures that are,"colder than a mother-in-laws stare"

Is it a possibility that a weak anti-freeze mixture could have resulted in a "near freeze" which pushed the freeze plug?
OR
Years of neglect of the cooling system,has eroded the water jacket throughout the entire engine to the point that
this particular freeze plug is just the first one to go? If neglect is more likely the answer,you may be better off
dumping a can of "Bars-Leaks" in the radiator and trading the vehicle off to some unsuspecting car dealer

cuz
there may be whole new engine in your near future

Just food for thought

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