The Ford Barn

flathead_jr · 07-26-2015, 11:55 AM

I've been trying to get the rotating assembly rotating again in my 37 Ford but with no luck as there is no findings on the top side as to why it would still be stuck, so I pulled the pan off to see if it had eaten a rod or something but it's fine on the bottom end as well. However I did notice around the freeze plugs on the pan rail (there are 4 of them) had been leaking do to corrosion over the years which would explain the old motor oil to have been a funny color. Whats the best replacement for these plugs? Dish style, cup style? I'm sure this has been covered before but I'd thought I'd get it covered again.

deuce_roadster · 07-26-2015, 08:45 PM

If they are corroded enough that the stock welch (sp?) plug won't seal it anymore, I have tapped them for pipe thread and used an allen head pipe plug. (with sealer).

flathead_jr · 07-26-2015, 10:55 PM

That's another option I was thinking of doing, are they a 3/8 or 1/2 pipe size?

bobH · 07-26-2015, 11:04 PM

I thought they are 1-cent-size ?? That's what I found in my LB.

35fordtn · 07-26-2015, 11:09 PM

I just put some in last week on a engine. They are a 3/4" concave type expansion plug. Readily available all over

mercman from oz · 07-27-2015, 01:49 AM

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While you have them out, make sure you poke a Screwdriver or similar up the holes. Last year, before I replaced these Welsh Plugs, I got over half a jar of rubbish out of them. Before I cleaned these out, my car overheated, now it runs cool. It is a good opportunity while they are out, as the Block fills up with rubbish in these areas and has nowhere to escape.

Terry,OH · 07-27-2015, 06:12 AM

While they should be available in a lot of places ,I was only able to find them at my local John Deere dealer. 3/4"

flathead_jr · 07-27-2015, 01:46 PM

I will have to try and clean the water jackets out best I can as they are caked with a mat of calcium and rust. The car came from California and they may have just run straight water in it it's whole life. In Idaho we run a 50-50 mix of antifreeze and there should be stuff in there that prevents rust. Any of my flatheads run with antifreeze have never had rust in the jackets.

SofaKing · 07-27-2015, 05:07 PM

John Deere Part # 30H9, 0.56$ each as of Dec 2014. I was given this part number by someone on this forum last autumn. They worked perfect!

Pick up some "corn-head", aka soda soap grease while you're there for the front u-joint.

07-26-2015, 11:55 AM	#1
flathead_jr Member Join Date: Jan 2012 Location: Idaho Falls, Id Posts: 66	1937 Ford engine freeze plugs I've been trying to get the rotating assembly rotating again in my 37 Ford but with no luck as there is no findings on the top side as to why it would still be stuck, so I pulled the pan off to see if it had eaten a rod or something but it's fine on the bottom end as well. However I did notice around the freeze plugs on the pan rail (there are 4 of them) had been leaking do to corrosion over the years which would explain the old motor oil to have been a funny color. Whats the best replacement for these plugs? Dish style, cup style? I'm sure this has been covered before but I'd thought I'd get it covered again.

07-26-2015, 08:45 PM	#2
deuce_roadster Senior Member Join Date: Oct 2011 Location: Shelton, WA Posts: 3,806	Re: 1937 Ford engine freeze plugs If they are corroded enough that the stock welch (sp?) plug won't seal it anymore, I have tapped them for pipe thread and used an allen head pipe plug. (with sealer).

07-26-2015, 10:55 PM	#3
flathead_jr Member Join Date: Jan 2012 Location: Idaho Falls, Id Posts: 66	Re: 1937 Ford engine freeze plugs That's another option I was thinking of doing, are they a 3/8 or 1/2 pipe size?

07-26-2015, 11:04 PM	#4
bobH Senior Member Join Date: May 2010 Location: so cal, placerville, vegas Posts: 1,395	Re: 1937 Ford engine freeze plugs I thought they are 1-cent-size ?? That's what I found in my LB.

07-26-2015, 11:09 PM	#5
35fordtn Senior Member Join Date: Aug 2010 Location: McMinnville, TN Posts: 2,327	Re: 1937 Ford engine freeze plugs I just put some in last week on a engine. They are a 3/4" concave type expansion plug. Readily available all over

07-27-2015, 01:49 AM	#6
mercman from oz Senior Member Join Date: May 2012 Location: Queensland, Australia Posts: 10,377	Re: 1937 Ford engine freeze plugs Sponsored Links (Register now to hide all advertisements) While you have them out, make sure you poke a Screwdriver or similar up the holes. Last year, before I replaced these Welsh Plugs, I got over half a jar of rubbish out of them. Before I cleaned these out, my car overheated, now it runs cool. It is a good opportunity while they are out, as the Block fills up with rubbish in these areas and has nowhere to escape.

07-27-2015, 06:12 AM	#7
Terry,OH Senior Member Join Date: May 2010 Posts: 4,771	Re: 1937 Ford engine freeze plugs While they should be available in a lot of places ,I was only able to find them at my local John Deere dealer. 3/4"

07-27-2015, 01:46 PM	#8
flathead_jr Member Join Date: Jan 2012 Location: Idaho Falls, Id Posts: 66	Re: 1937 Ford engine freeze plugs I will have to try and clean the water jackets out best I can as they are caked with a mat of calcium and rust. The car came from California and they may have just run straight water in it it's whole life. In Idaho we run a 50-50 mix of antifreeze and there should be stuff in there that prevents rust. Any of my flatheads run with antifreeze have never had rust in the jackets.

07-27-2015, 05:07 PM	#9
SofaKing Senior Member Join Date: Jun 2014 Location: Salt Lake City, Utah Posts: 756	Re: 1937 Ford engine freeze plugs John Deere Part # 30H9, 0.56$ each as of Dec 2014. I was given this part number by someone on this forum last autumn. They worked perfect! Pick up some "corn-head", aka soda soap grease while you're there for the front u-joint. Last edited by SofaKing; 07-27-2015 at 05:09 PM. Reason: Fit of CRS