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weeping freeze plugs #2738100 01/30/20 02:10 PM 01/30/20 02:10 PM
Joined: Mar 2008 Posts: 31 Washington State S Sport383 OP member
Sport383 OP member S Joined: Mar 2008 Posts: 31 Washington State	I have three weeping freeze plugs on my 383 cylinder heads. I can replace two without removing the heads. They only weep when it is cold but seem to seal up when the engine warms up. is there a good leak stop additive on the market to use to seal up the one I can not replace? Advice, recommendations, and snide remarks welcome because they are out there. Thanks in advance.

Re: weeping freeze plugs [Re: Sport383] #2738103 01/30/20 02:27 PM 01/30/20 02:27 PM
Joined: Jun 2004 Posts: 3,390 St. Charles, MO wingman Uncreative Title
wingman Uncreative Title Joined: Jun 2004 Posts: 3,390 St. Charles, MO	Brass or steel? How long have they been installed? 1969 Dodge Coronet Super Bee 383 A4 1970 Plymouth Road Runner 440 FC7 (sold)

Re: weeping freeze plugs [Re: wingman] #2738107 01/30/20 02:34 PM 01/30/20 02:34 PM
Joined: Mar 2008 Posts: 31 Washington State S Sport383 OP member
Sport383 OP member S Joined: Mar 2008 Posts: 31 Washington State	Installed back in 85 and steel.

Re: weeping freeze plugs [Re: Sport383] #2738112 01/30/20 02:40 PM 01/30/20 02:40 PM
Joined: Jan 2003 Posts: 13,385 Marion, South Carolina [><] an8sec70cuda I Live Here
an8sec70cuda I Live Here Joined: Jan 2003 Posts: 13,385 Marion, South Carolina [><]	Blue Devil. It's a stop leak additive from your local parts store. CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax

Re: weeping freeze plugs [Re: an8sec70cuda] #2738121 01/30/20 03:03 PM 01/30/20 03:03 PM
Joined: Jan 2003 Posts: 20,730 Eagle, Idaho Neil The Doctor is in.
Neil The Doctor is in. Joined: Jan 2003 Posts: 20,730 Eagle, Idaho	Prestone had a stop leak that was fiber particles that clung together at any holes. I t worked ok back when I used it. Permatex hardening form-a-gasket wiped around the holes before they go in is great. You may be able to wipe a thin coating around the freeze plugs to seal them now???

Re: weeping freeze plugs [Re: Sport383] #2738141 01/30/20 04:27 PM 01/30/20 04:27 PM
Joined: Jan 2003 Posts: 9,436 Blair County,PA 62maxwgn master
62maxwgn master Joined: Jan 2003 Posts: 9,436 Blair County,PA	[quote=Sport383]I have three weeping freeze plugs on my 383 cylinder heads. I can replace two without removing the heads. They only weep when it is cold but seem to seal up when the engine warms up. is there a good leak stop additive on the market to use to seal up the one I can not replace? Advice, recommendations, and snide remarks welcome because they are out there. Thanks in advance. [/quote Do it now the right way,you will have to eventually do it anyway !

Re: weeping freeze plugs [Re: 62maxwgn] #2738169 01/30/20 06:14 PM 01/30/20 06:14 PM
Joined: Jul 2008 Posts: 30,474 Florida STAYcation dOc ! The village idiot's idiot
dOc ! The village idiot's idiot Joined: Jul 2008 Posts: 30,474 Florida STAYcation	Weeping .... crying .. plugs ? .... find out what their issues are and speak softly and calmly to them ! You welcomed SNIDE remarks ...

Re: weeping freeze plugs [Re: dOc !] #2738172 01/30/20 06:24 PM 01/30/20 06:24 PM
Joined: Jan 2003 Posts: 4,287 Morrow, OH markz528 master
markz528 master Joined: Jan 2003 Posts: 4,287 Morrow, OH	Sounds like they are rusted. If so, you are pushing a rope with a sealant for long term fix. Sealant should work for a while but will start leaking again. 67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......

Re: weeping freeze plugs [Re: Sport383] #2738253 01/30/20 10:03 PM 01/30/20 10:03 PM
Joined: Aug 2003 Posts: 43,284 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,284 Bend,OR USA	Alumaseal (SP?) It comes in a small tube, it is a powder. It works great, use all the tube and follow the directions Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: weeping freeze plugs [Re: Cab_Burge] #2738340 01/31/20 10:17 AM 01/31/20 10:17 AM
Joined: Aug 2006 Posts: 2,533 God's Country Maryland GODSCOUNTRY340 master
GODSCOUNTRY340 master Joined: Aug 2006 Posts: 2,533 God's Country Maryland	K-Seal, Walmart sells it. I love the smell of Deer guts in the morning, it smells like... VICTORY!

Re: weeping freeze plugs [Re: markz528] #2738358 01/31/20 11:01 AM 01/31/20 11:01 AM
Joined: Jun 2004 Posts: 3,390 St. Charles, MO wingman Uncreative Title
wingman Uncreative Title Joined: Jun 2004 Posts: 3,390 St. Charles, MO	Originally Posted by markz528 Sounds like they are rusted. If so, you are pushing a rope with a sealant for long term fix. Sealant should work for a while but will start leaking again. Unfortunately I agree with this. Sealants may help for a while, but based on the length of time that they have been in there, it sounds like your steel plugs are on their way out. The problem with limping them along is that one day under pressure one may fail completely and leave you stranded (best case) or overheat your engine (worst case). 1969 Dodge Coronet Super Bee 383 A4 1970 Plymouth Road Runner 440 FC7 (sold)

Re: weeping freeze plugs [Re: Cab_Burge] #2738399 01/31/20 12:52 PM 01/31/20 12:52 PM
Joined: Jan 2003 Posts: 15,487 Omaha Ne T TJP I Live Here
TJP I Live Here T Joined: Jan 2003 Posts: 15,487 Omaha Ne	Originally Posted by Cab_Burge Alumaseal (SP?) It comes in a small tube, it is a powder. It works great, use all the tube and follow the directions It's been my choice for over 40 years. www.tandmautomotive-omaha.com

Re: weeping freeze plugs [Re: an8sec70cuda] #2738420 01/31/20 01:57 PM 01/31/20 01:57 PM
Joined: Mar 2010 Posts: 1,061 Atlanta, GA M mgoblue9798 super stock
mgoblue9798 super stock M Joined: Mar 2010 Posts: 1,061 Atlanta, GA	Got to be careful with that stuff on vehicles with cats. Used it trying to limp along a magnum engine with a bad head gasket. Didn't work sealing the gasket,but sealed up the cat converter very well.

Re: weeping freeze plugs [Re: mgoblue9798] #2738475 01/31/20 06:05 PM 01/31/20 06:05 PM
Joined: Jan 2003 Posts: 20,730 Eagle, Idaho Neil The Doctor is in.
Neil The Doctor is in. Joined: Jan 2003 Posts: 20,730 Eagle, Idaho	If they were not sealed up originally they would have leaked right away. If they have gone this long and are just now leaking then rust may be the culprit. A guy on here used a large pony clamp to push the plugs in in the back of the heads without having to pull them. Use the form-a-gasket hardening sealer on the holes before they go in. 100% sealed for life this way.

Re: weeping freeze plugs [Re: Neil] #2738496 01/31/20 07:52 PM 01/31/20 07:52 PM
Joined: Dec 2009 Posts: 20,660 in a cattle trailer down by th... G Guitar Jones Paddle faster! I hear banjo music!
Guitar Jones Paddle faster! I hear banjo music! G Joined: Dec 2009 Posts: 20,660 in a cattle trailer down by th...	They are rusted. Best plan is pull the engine and replace them all then you are done with it. "Follow me the wise man said, but he walked behind" '92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion. '74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion. 2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.

Re: weeping freeze plugs [Re: Guitar Jones] #2738513 01/31/20 09:04 PM 01/31/20 09:04 PM
Joined: Jan 2003 Posts: 20,886 A collage of whims topside Too Many Posts
topside Too Many Posts Joined: Jan 2003 Posts: 20,886 A collage of whims	I really wouldn't want that time-bomb ticking away, worrying about it every time I take the car out. Do the right thing, pull it apart as needed, and give it the permanent repair. If the freeze plugs in the heads are going away, I'd also wonder about the ones in the block. Granted, it's a PITA, and I don't envy anyone with that problem. If there's enough access to the rear ones in the car, maybe a right-angle drill would help. I'm thinking drill a hole that you can screw a fastener into and pry the plug out.

Re: weeping freeze plugs [Re: topside] #2738528 01/31/20 09:52 PM 01/31/20 09:52 PM
Joined: Oct 2003 Posts: 3,379 KY USA mopargem master
mopargem master Joined: Oct 2003 Posts: 3,379 KY USA	Originally Posted by topside I really wouldn't want that time-bomb ticking away, worrying about it every time I take the car out. Do the right thing, pull it apart as needed, and give it the permanent repair. If the freeze plugs in the heads are going away, I'd also wonder about the ones in the block. Granted, it's a PITA, and I don't envy anyone with that problem. If there's enough access to the rear ones in the car, maybe a right-angle drill would help. I'm thinking drill a hole that you can screw a fastener into and pry the plug out. Might as well split the transmission and get those on the back of the block as well

Re: weeping freeze plugs [Re: topside] #2738532 01/31/20 10:03 PM 01/31/20 10:03 PM
Joined: Jan 2003 Posts: 29,656 Hamtramck, PA A Alaskan_TA Fluffy Balladeer
Alaskan_TA Fluffy Balladeer A Joined: Jan 2003 Posts: 29,656 Hamtramck, PA	Even if you can do the contortions to get them out, you still need room to clean the bores & install new plugs properly. Pull the engine while it is cold out & there is time to get-er-done before warmer weather hits so you can drive it.

Re: weeping freeze plugs [Re: mopargem] #2738537 01/31/20 10:10 PM 01/31/20 10:10 PM
Joined: Aug 2006 Posts: 2,533 God's Country Maryland GODSCOUNTRY340 master
GODSCOUNTRY340 master Joined: Aug 2006 Posts: 2,533 God's Country Maryland	Originally Posted by mopargem Originally Posted by topside I really wouldn't want that time-bomb ticking away, worrying about it every time I take the car out. Do the right thing, pull it apart as needed, and give it the permanent repair. If the freeze plugs in the heads are going away, I'd also wonder about the ones in the block. Granted, it's a PITA, and I don't envy anyone with that problem. If there's enough access to the rear ones in the car, maybe a right-angle drill would help. I'm thinking drill a hole that you can screw a fastener into and pry the plug out. Might as well split the transmission and get those on the back of the block as well There are no freeze plugs on the front or rear of the block on big blocks, just the cam plug. I love the smell of Deer guts in the morning, it smells like... VICTORY!

Re: weeping freeze plugs [Re: Sport383] #2738578 01/31/20 11:55 PM 01/31/20 11:55 PM
Joined: Jan 2003 Posts: 1,908 Nebraska 4 4406bbl top fuel
4406bbl top fuel 4 Joined: Jan 2003 Posts: 1,908 Nebraska	Originally Posted by Sport383 I have three weeping freeze plugs on my 383 cylinder heads. I can replace two without removing the heads. They only weep when it is cold but seem to seal up when the engine warms up. is there a good leak stop additive on the market to use to seal up the one I can not replace? Advice, recommendations, and snide remarks welcome because they are out there. Thanks in advance. If I was you I would pull the motor, knock out all of the plugs, then wash the 1-2" of dirt and rust out of the bottom of the block with a hose. That is what I see when I see cars that have sat a lot. You might want think new head gaskets if they are steel shim type, and the spring in the lower hose will also be rusty or gone. It does not take long once you decide to fix it right.

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