Installing freeze/expansion plugs in the coolant ports to the intake.
5 Attachment(s)
Since this seems to be coming up a lot lately I took some pictures of how I do it. Out of 10+ motors I have only had one leak (previous owner installed plugs and pried them out leaving some pretty nasty grooves).
Get yourself some 20mm freeze (expansion) plugs, I use napa because they seem to always have them in stock. part #381-2151 They should run you about $2. Attachment 718363 Clean the ports in the housings well, and check for burrs, or irregularities. A fine grit sandpaper and your finger will smooth out any imperfections quite nicely. Acquire a suitable installation driver tool, I use a craftsman 6in 3/8 drive socket extension. Attachment 718364 A light coat of rtv will act as a lubricant for install and as a sealing agent once they are in. Attachment 718365 With a hammer and your socket extension (or other appropriately sized tool) drive them in square to the housing, and just below the surface. Attachment 718366 Clean up the errant rtv, and put it all back together. I usually let them cure for a few hours before re-assembly, and overnight before running. Attachment 718367 Isaac |
nice writeup Isaac! i don't think it gets any better than that on an install of the freeze plugs! if you want i can sticky this.
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Do with it what you please :)
Isaac |
Lol perfect timing. I'm trying to find freeze plugs local. Thank you for the part number. I'll see if napa has them in stock hopefully.
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O'Reilly had the steel ones in stock - I ordered brass ones, on the premise that they'd be less likely to mung the aluminum should I decide to take them back out later.
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thread is stuck!
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Silly question, but are the plugs the same size for 12A housings? I only ask because the pictures show a 13B.
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Yes, all 12a and 13b are 20mm.
Isaac |
How much of the block would I have to drain in order to take off the manifold without coolant spilling everywhere?
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Originally Posted by MiniFoo
(Post 11013818)
How much of the block would I have to drain in order to take off the manifold without coolant spilling everywhere?
Isaac |
Yeah, that's what I was thinking too. The coolant passages going into the intake manifold are only there to heat it up faster in the winter, right? How much of an effect does blocking them off have on cold weather starts, even if I keep my choke?
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We always forget about the ACV port, don't we?
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Originally Posted by Jeff20B
(Post 11014169)
We always forget about the ACV port, don't we?
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oooooh i just love that you cant make a new thread till you have 20 posts... it has kept me from posting on this site for QUITE SOME TIME NOW! :rant:
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how reversible is this process? I'd really like to try freeze plugs and see how it effects cold starts. but is it possible to remove them without doing a rebuild? maybe drill out the center to pull em out?
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They come out really easy. I just took a screw driver and tapped it on one side of the indented part (not the ring). The plug swiveled and I was able to pull it out with a pair of pliers. Whatever you do, do not put the screwdriver between the plug and the housing.
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Edit. Nevermind, sorry for the thread revival.
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