freeze plugs
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Joined: Oct 2006
Posts: 92
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From: Highland Village texas
freeze plugs
After installing my new 454, I filled the cooling system and let it sit overnight. When I went out in the morning there was a small puddle of coolant under the car. Three of the freeze plugs are seeping. Do I have any options other then pulling then out and replacing them? One is under the motor mount and the others are blocked by the headers, so I'd have to pull the headers and one motor mount.
Pro
Joined: Jun 2009
Posts: 613
Likes: 3
From: Fleetwood PA
Uggg....that sucks.
I've heard that some have had success with Loc-tite Green?(I think it's the green) It's made to wick into tight spaces.I've never tried it, so I'm not sure how well this will work. If you have three leaking, I would pull them and replace them. I know that's probably not the answer your looking for ,but if they are leaking from just sitting, they'll be spraying once there is pressure and heat in the system from running it. I don't know how well "Bars leak" or some similar radiator stop leak will work on the freeze plugs, but if one of them lets go, your stuck wherever you happen to be.
I've heard that some have had success with Loc-tite Green?(I think it's the green) It's made to wick into tight spaces.I've never tried it, so I'm not sure how well this will work. If you have three leaking, I would pull them and replace them. I know that's probably not the answer your looking for ,but if they are leaking from just sitting, they'll be spraying once there is pressure and heat in the system from running it. I don't know how well "Bars leak" or some similar radiator stop leak will work on the freeze plugs, but if one of them lets go, your stuck wherever you happen to be.
Drifting
Joined: Aug 2004
Posts: 1,883
Likes: 124
From: Lubbock TX
Sorry, but you need to pull 'em to do it right.
First, start with brass plugs, they've always lasted longer for me.
Second, don't forget to apply some sealant around the core hole before you push the plug in place, it can save some headaches.
First, start with brass plugs, they've always lasted longer for me.
Second, don't forget to apply some sealant around the core hole before you push the plug in place, it can save some headaches.
Drifting
Joined: Jun 2010
Posts: 1,781
Likes: 15
From: Oxford Ohio
There are replacement plugs that will fix the issue if you can get the old ones out.
The replacement plugs are rubber with a large washer and a nut on the face of the plug. Once you install the rubber plug you tighten the nut, the rubber part swells to seal. Like a hand tightened pop rivit so to speak.
The only way to get the one under the motor mount repaired that I know of. I just called the local NAPA store and they have them instock by size.
The replacement plugs are rubber with a large washer and a nut on the face of the plug. Once you install the rubber plug you tighten the nut, the rubber part swells to seal. Like a hand tightened pop rivit so to speak.
The only way to get the one under the motor mount repaired that I know of. I just called the local NAPA store and they have them instock by size.
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
After installing my new 454, I filled the cooling system and let it sit overnight. When I went out in the morning there was a small puddle of coolant under the car. Three of the freeze plugs are seeping. Do I have any options other then pulling then out and replacing them? One is under the motor mount and the others are blocked by the headers, so I'd have to pull the headers and one motor mount.
New engine? Give it a bit of time. Start it up get it good and hot. See if the leaking stops.
Jim
Melting Slicks
Joined: Aug 2001
Posts: 2,043
Likes: 1
From: Elkhorn WI
I just did one on my 350 the other day.....lots of laying on my side to get that bugger out. I would not want to try 3 on a BB.
But as stated, if this is "new" engine, did the installer of the plugs not coat the surrounding of the hole/plug with a sealant?
But as stated, if this is "new" engine, did the installer of the plugs not coat the surrounding of the hole/plug with a sealant?
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