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 Post subject: Freeze plug leaking
PostPosted: Sat Apr 21, 2018 10:51 pm 
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So I finally found the coolant leak on my '89

Freeze plug behind the starter motor (on the block) is leaking, looks like corrosion caused it.

I've never replaced a freeze plug before, but I figure it can't be that hard. Drill a hole in it, slide hammer it out, install new plug.

The last time I had a shop replace the plugs in a block, they used some sort of brown (I think) sealant on them. I'm not sure what it was, but I also have to consider that this will be an 'on car' service to fix it, and it has to be done as cheap as possible. So unless you all know where I can get a free block heater...

Can a freeze plug be installed without any special tools? (A task I'm currently using the magic of google to research as well)

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 Post subject: Re: Freeze plug leaking
PostPosted: Sat Apr 21, 2018 11:59 pm 
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Assuming it's a slow leak, have you tired the GM coolant sealing pellets? It might be worth a shot depending how much you really feel like messing with with the plug.

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 Post subject: Re: Freeze plug leaking
PostPosted: Sun Apr 22, 2018 8:57 am 
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Joined: Sun Aug 22, 2010 11:11 pm
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Location: Ontario, Canada
Year and Trim: 2000 Bonniville SSEi L67
i had a small leak from heater plug - put some stop leak(high quality) and it works great on tiny leaks - if its rotted, it may work but only temp.

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 Post subject: Re: Freeze plug leaking
PostPosted: Mon Apr 23, 2018 12:49 am 
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I was gonna say the cooling system pellets too.

Otherwise, the one way I do it without a freeze plug removing tool (which kinda does what you were thinking), is to take a screwdriver, Tap the screwdriver on one side of the freeze plug and it should rotate/flip the other end out in the bore. From there, just grab it with a pair of pliers and work it out.

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 Post subject: Re: Freeze plug leaking
PostPosted: Mon Apr 23, 2018 9:38 am 
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Location: Dearborn, MI
Year and Trim: '93 SSEi
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'97 LeSabre
While I would love to try something like the cooling system stop leak, it's actually more expensive than a new freeze plug. So I'll give it a go this weekend.

_________________
I don't know how much boost it takes to blow the tires off. But I know how much I'm going to use!
Image

Runs:
'93 Pontiac Bonneville SSEi - Twincharged, manual, racecar! Build thread
'97 Chevy Camaro - 3800, T5, T-tops, my DD
'05 Cadillac STS - V8, AWD, her DD
'89 Buick LeSabre Limited - winter DD
'84 GMC Sierra Classic - Twin turbo 3800
'97 Buick LeSabre - L67 project
'92 Pontiac Bonneville SSE future project

Doesn't run:
'87 Buick LeSabre T-type - future victim
'67 Buick LeSabre - future victim


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 Post subject: Re: Freeze plug leaking
PostPosted: Mon Apr 23, 2018 12:04 pm 
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Joined: Wed May 13, 2009 10:45 pm
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Location: CHICAGO
Year and Trim: 2006 Cadillac STS-V, 2004 Pontiac GTO
Here is a video of what I was trying to explain above.

https://www.youtube.com/watch?v=Cru1X9hbZ20

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Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

Daily Drivers:
2015 Chrysler Town & Country Limited Platinum: Mommy's NEW RGC
2007 Chrysler Town & Country Limited: Daddy's beater affectionately called the Rolling Garbage Can or "RGC" for short
2009 Chevrolet Impala SS: LS4 V8, Victory Red
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck


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