Cracked cylinder head leaking coolant

The Cub Club -- Questions and answers to all of your Cub related issues.
Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
User avatar
BJM68
5+ Years
5+ Years
Posts: 100
Joined: Sat May 13, 2017 7:19 pm
Zip Code: Ont
Tractors Owned: 48 Cub
51 Cub
1930 McCormick Deering 10/20
49 cub
49 Cub with front plow
Location: Kingston Ontario

Cracked cylinder head leaking coolant

Postby BJM68 » Sat May 01, 2021 3:55 pm

PNG image.png
PNG image.png (87.55 KiB) Viewed 249 times
Finally decided to adjust fingers and free play thru handhole Had great success and happy to have eleveated the grind Happy story ends as I trace coolant trail to weeping crack in recently rebuilt motor (15 months ) It is not a working tractor just for rides and trailer moves What brand of JB Weld should I use to fill crack after I grind it It appears the rebuilder may have used too long a bolt? Can one bolt be removed to check length or is it best to grind and patch

User avatar
Glen
10+ Years
10+ Years
Posts: 5396
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Cracked cylinder head leaking coolant

Postby Glen » Sun May 02, 2021 1:45 am

Hi,
The head bolt threads need non hardening sealer put on them as you put the head on the engine.
Without sealer they can leak coolant out the head gasket, or perhaps out from under the bolt head.
People have said on here that they have had leaks from no sealer on the bolt threads.

I don't know if you can see a crack, or coolant is coming out the head gasket, or under the bolt head.

I would dry it off and look closely with a light, and see where the coolant first appears. :)

Gary Dotson
Team Cub Mentor
Team Cub Mentor
Posts: 4902
Joined: Thu Aug 03, 2006 6:20 am
Zip Code: 43358
Tractors Owned: 48 Cub Diesel (Cubota)
53 Cockshutt 20 restored (Shooter)
52 Cockshutt 20 unrestored
47 Leader "B" (Herckie)
49 Leader "D" (Princess)
49 Leader "D" very rough
48 Leader "D" unrestored
Kubota B6200E
Kubota B6200HST
Kubota B8200HST-D
Circle of Safety: Y
Location: OH West Mansfield

Re: Cracked cylinder head leaking coolant

Postby Gary Dotson » Sun May 02, 2021 6:38 am

I can't make anything out from your pic. but Glen's advice, above is good. If it actually is a crack and you want to attempt a J.B. Weld repair, J.B. weld is the brand name.

User avatar
BJM68
5+ Years
5+ Years
Posts: 100
Joined: Sat May 13, 2017 7:19 pm
Zip Code: Ont
Tractors Owned: 48 Cub
51 Cub
1930 McCormick Deering 10/20
49 cub
49 Cub with front plow
Location: Kingston Ontario

Re: Cracked cylinder head leaking coolant

Postby BJM68 » Sun May 02, 2021 8:37 am

PNG image.png
PNG image.png (106.99 KiB) Viewed 158 times
Update to show leak area more clearly

User avatar
Lt.Mike
10+ Years
10+ Years
Posts: 2432
Joined: Sun Feb 17, 2008 2:38 am
Zip Code: 07727
Tractors Owned: 1 -'58 International Cub Lo-Boy
2 - '46 International A's
2 - '52 Farmall Cubs
1 - '53 Farmall Super A
1 - ‘41 Ford 9N with a ‘49 8N Engine
1 - ‘48 (5641) Allis Chalmers G
Location: Farmingdale NJ

Re: Cracked cylinder head leaking coolant

Postby Lt.Mike » Sun May 02, 2021 11:38 am

I used JB Weld steel stick on mine.
I used a cutoff wheel And a die grinder to open the crack, cleaned it with CRC electrical cleaner solvent spray and pressed the epoxy paste in.
Very satisfied with the results.
Quote by Gary Pickeral I like
"If it can cast a shadow, it can be restored"

User avatar
BJM68
5+ Years
5+ Years
Posts: 100
Joined: Sat May 13, 2017 7:19 pm
Zip Code: Ont
Tractors Owned: 48 Cub
51 Cub
1930 McCormick Deering 10/20
49 cub
49 Cub with front plow
Location: Kingston Ontario

Re: Cracked cylinder head leaking coolant

Postby BJM68 » Sun May 02, 2021 11:49 am

Thanks I will get it drained and start the fix


  • Similar Topics
    Replies
    Views
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: No registered users and 0 guests