ca engine freeze plugs
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=124652
Printed Date: 18 Jul 2025 at 5:58pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: ca engine freeze plugs
Posted By: AChoe
Subject: ca engine freeze plugs
Date Posted: 16 Jun 2016 at 7:34am
| I have a model CA that I have restored and the large freeze plugs on the right side of the engine (3) are leaking oil. I have looked for replacements but cant seem to find any this size. Does anyone know where to get these or is there a way to remove them from outside the engine without damaging them. I know I can seal them up if I could get them out without damaging them. |
Replies:
Posted By: Alberta Phil
Date Posted: 16 Jun 2016 at 10:21am
| The freeze plugs would be leaking coolant, not oil. New ones are available from suppliers on this site like Tony's Tractors. They are removed by punching or drilling a hole in them and then removing them from the outside. They can't be removed without damaging them. |
Posted By: Dick L
Date Posted: 16 Jun 2016 at 10:55am
No freeze plugs in the block that could leak coolant! They are core plugs that cover the galley that the oil from the oil filter travels over the camshaft lifters to the front of the engine and back into the oil pan. |
Alberta Phil wrote:Posted By: Dick L
Date Posted: 16 Jun 2016 at 11:01am
|
I have always been able to get them from NAPA. The way to get them out is to hit them in the center with a ballpeen hammer to force/bend the center in. Nothing behind them
to get damaged to bend them in enough to release the outside pressure. Here is a picture from my Tie bolt story on how to draw top block cracks tight. 
|
Posted By: AChoe
Date Posted: 16 Jun 2016 at 11:08am
|
Thanks for the help. And you are correct there is no antifreeze at that location. these are just open into the pushrod galley and have no pressure on them, they just seep enough oil to make a nice shiny paint job look terrible after a few hours of mowing. |
Posted By: AChoe
Date Posted: 16 Jun 2016 at 11:14am
| I also have an issue with an oil leak on the hydraulic valve body. Directly below the raise/lower valve is the main valve body. the top of the main valve body has four threaded caps/plugs that retain internal components or passages. when these were line bored at the factory it looks like they bored all the way through the bottom of the valve body and then plugged the holes in the bottom. one of these , I believe plugs, is leaking enough to make an oil spot on my clean shop floor. I would like to repair it but I'm not sure how to attack it without damaging the body or the plug, which might be hard to find a replacement. has anyone had any dealings with these? |
Posted By: LeonR2013
Date Posted: 16 Jun 2016 at 11:34am
| Achoe you can take a large ball peen and gently hit the freeze plug around the center until it loosens up and then pop it out. Then take the plug and using the hammer again tap it back to the original shape. Clean it and the block up, add just a touch of sealer if you want and put it back in. Hit it with the flat face of the hammer this time one time. It might take a second lick, but don't overdo it. I've done this many times in a pinch and it's always worked. Poor people, poor ways you know. Leon R Cmo |
Posted By: AChoe
Date Posted: 16 Jun 2016 at 11:41am
| thanks Leon that's what I will try first. |
Posted By: DiyDave
Date Posted: 16 Jun 2016 at 6:08pm
| Or, you could drill a small hole, off center, and thread the screw, of a slide hammer dent puller, into the hole, and whack them out, that way... |
Posted By: TomMN
Date Posted: 17 Jun 2016 at 9:34am
|
I have ordered them from McMaster Carr. http://www.mcmaster.com/#9563k164/=12w5x6h" rel="nofollow - http://www.mcmaster.com/#9563k164/=12w5x6h |
Posted By: Gale Hawkins
Date Posted: 25 Aug 2018 at 12:07am
| Dorman 550-032 Concave Expansion Plug is a source I found on Amazon and some parts stores for our Model B. |
Posted By: Gale Hawkins
Date Posted: 30 Aug 2018 at 1:08am
They came yesterday in only two days. We pulled out ours because they were 70 years old and it let us get into the block to clean out the gelled mess from running a mixture of coolant and oil plus stop leak. The coolant leak was from failed sleeve O-rings. What a mess but today I finished the heavy cleaning of the inside of the block as well as the old pistons and sleeves so after a finish wash we will start putting the cylinder sleeves and cam bearings/shaft while we wait on the crankshaft. Look like the B drank out of the pond with the other horse stock.
|