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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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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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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.

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The Fleet:
'93 SSEi - Twincharged + manual Build thread
'97 Camaro - Top swap
'05 STS - V8, AWD, her DD
'92 Trofeo - Fair weather DD
'99 Montana - top swap 3800
'04 Sierra 2500HD - LLY Duramax

Current project:
Something cool, trust me.

Upcoming projects:
'92 Bonneville SSE
'87 LeSabre T-type
'67 LeSabre

Gone to greener pastures:
'84 Sierra Classic - Twin turbo 3800
'97 LeSabre - Top swap

RIP:
'86 LeSabre - pictures
'93 SE - L67


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 Post subject: Re: Freeze plug leaking
PostPosted: Mon Apr 23, 2018 12:04 pm 
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Here is a video of what I was trying to explain above.

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

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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:
2019 Chrysler Pacifica Limited: Mommy's new RGC
2015 Chrysler Town & Country Limited Platinum: Kids new RGC
2007 Chrysler Town & Country Limited: Sold to neighbor
2009 Pontiac G8 GT: L76, Sport Red Metallic
2003 Chevrolet Suburban 2500: Doeskin Tan - 8.1L Big Block... new plow truck
1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck


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