Cooling issues !

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Sparkey1207
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Tractors Owned: Used to own 55 cub with blade and 42" deck
Currently restoring 63 cub and looking for grader blade

Cooling issues !

Postby Sparkey1207 » Mon Apr 03, 2017 8:43 pm

I've reassembled my 63 cub and after a valve job, new head gasket with bolts torqued to spec I now have a cooling issue. An excessive amount of coolant will blow out of the overflow tube every 10 or 15 seconds as water starts to circulate along with some steam after the engine heats up. After shutting the engine down a lot of steam will continue to blow out the overflow until the motor cools down a little. Is this a symptom of a clogged radiator or some other problem ? If the radiator is clogged is there anything that can be poured into it to help clean it out without removing it from the tractor. I didn't get to run cub that much last year when I bought it so I'm not sure if this was a pre existing symptom before I tore it down paint and valve job.

Thanks for any suggestions,
Mike R. (Sparkey)

tst
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Re: Cooling issues !

Postby tst » Mon Apr 03, 2017 9:02 pm

sounds like the coolant is getting in to the cylinders ?, did you copper coat the head gasket and use a sealer on the head bolts?

SONNY
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Re: Cooling issues !

Postby SONNY » Mon Apr 03, 2017 9:08 pm

Head gasket on the right side up and pointed the right direction???----(probably so!)---I would say a former problem.---Could even be cracked head. (Hope not)!---Block could have a lot of sediment settled in the bottom, and radiator tubes could be kinda plugged! A combination of this would result in it getting a bit hot. thanks; sonny
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Glen
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Re: Cooling issues !

Postby Glen » Mon Apr 03, 2017 9:09 pm

Hi,
You might have filled the radiator too much when it was cold, the coolant level in a Cub will rise as the engine warms up. When the engine is cold, it should be filled just barely over the baffle that is visible down below the filler opening. Use a light and look in and you can see it.
If it was filled too much, it will push the coolant out of the radiator overflow tube as it warms up.

Also, if the coolant level was low, down to the tubes, you could see if the tubes look open or plugged at the top end of them. You can only see to the left or right, down below the baffle. You need a light to look in it. :)
Last edited by Glen on Tue Apr 04, 2017 12:38 am, edited 1 time in total.

Sparkey1207
Posts: 11
Joined: Mon Oct 03, 2016 9:28 pm
Zip Code: 45036
Tractors Owned: Used to own 55 cub with blade and 42" deck
Currently restoring 63 cub and looking for grader blade

Re: Cooling issues !

Postby Sparkey1207 » Mon Apr 03, 2017 10:13 pm

No copper coat used on gasket. Sealer used on all head bolts. Head appeared to be in good condition after cleaning with no visible cracks. Head, block and old gasket showed no signs of coolant or exhaust going somewhere it shouldn't. Perhaps hot water entering the top of the radiator can't flow down the tubes fast enough (clogged ?) and instead goes out the overflow ??????

SONNY
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Re: Cooling issues !

Postby SONNY » Mon Apr 03, 2017 11:13 pm

That is narrowing it down purdy fast!---Kinda sounds like a good place to start.---see if you can look in the top with a light and small mirror .---Might be able to make an air blow gun and try that across the top,---nothing to lose if it dont work. thanks; sonny
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Re: Cooling issues !

Postby JohnMihevic » Tue Apr 04, 2017 3:11 am

Remove the grille and move your hand over the entire core as the engine warms up to see if you feel any cold spots which would indicate plugged tubes. Water will come out the overflow if too full, but you indicate sporadic overflow every 10-15 seconds with steam. Sound like boiling to me and that's not right.

John M.

staninlowerAL
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Re: Cooling issues !

Postby staninlowerAL » Tue Apr 04, 2017 4:42 am

All good suggestions. Have you flushed the block and bolster with a flushing tool?

Sparkey1207
Posts: 11
Joined: Mon Oct 03, 2016 9:28 pm
Zip Code: 45036
Tractors Owned: Used to own 55 cub with blade and 42" deck
Currently restoring 63 cub and looking for grader blade

Re: Cooling issues !

Postby Sparkey1207 » Thu Apr 06, 2017 7:28 pm

Cooling issue update.
What little that I can see inside radiator it appears surprisingly clean. The tops of the few tubes I can see on either side of the baffle also look clean. Running engine at low rpm with radiator cap off I noticed some tiny bubbles rising along side the baffle tube. Increasing to high rpm bubbling increases to the point it starts sloshing coolant out the open radiator as engine heats up. When shutting tractor off I get all the steam and hissing of boiling water. Am I right in thinking this is a leaking head gasket even though there are no signs of steam going out the exhaust or water in the oil ? This was a new head gasket with bolts torqued to spec and in order shown in manual. Head also checked flat when I had it off. I'm about to order another valve grind gasket set unless I get some other ideas. Cub runs perfect except for this issue. I don't relish the idea of tearing it down again but it is what it is. Lol
Thanks
Mike.

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Re: Cooling issues !

Postby Eugene » Thu Apr 06, 2017 7:55 pm

staninlowerAL wrote:Have you flushed the block and bolster with a flushing tool?
Crud builds up behind and around cylinders 3 and 4. Crud will cause hot spots. Suggest you flush the engine block and bolster before doing anything else.
I have an excuse. CRS.

Sparkey1207
Posts: 11
Joined: Mon Oct 03, 2016 9:28 pm
Zip Code: 45036
Tractors Owned: Used to own 55 cub with blade and 42" deck
Currently restoring 63 cub and looking for grader blade

Re: Cooling issues !

Postby Sparkey1207 » Thu Apr 06, 2017 9:06 pm

I'll try that first. I'm assuming a flushing tool will be something flexible that will bend around inside the bolster and engine block ?

Thanks for everyone's help.

tst
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Re: Cooling issues !

Postby tst » Thu Apr 06, 2017 9:37 pm

bubbles are probably a sign of a leaking head gasket, you do not need a valve grind set, you can buy a head gasket separate, if you tear it down make sure to seal head bolts and coat the head gasket with copper spray on assembly
good luck

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Re: Cooling issues !

Postby Crimson Tim » Thu Apr 06, 2017 11:29 pm

tst wrote:bubbles are probably a sign of a leaking head gasket, you do not need a valve grind set, you can buy a head gasket separate, if you tear it down make sure to seal head bolts and coat the head gasket with copper spray on assembly
good luck


Head gasket at TM Tractor Parts, site sponsor: http://www.tmtractor.com/new/en/438fp.htm

Sparkey1207
Posts: 11
Joined: Mon Oct 03, 2016 9:28 pm
Zip Code: 45036
Tractors Owned: Used to own 55 cub with blade and 42" deck
Currently restoring 63 cub and looking for grader blade

Re: Cooling issues !

Postby Sparkey1207 » Fri Apr 07, 2017 7:35 am

Thanks for the link for head gasket. I'll get that ordered and get some sealer at the auto parts store. I used pipe dope on the head bolts. Is that a good choice to use or is there something better ?

staninlowerAL
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Posts: 3181
Joined: Fri Oct 29, 2010 11:34 pm
Zip Code: 36558
Tractors Owned: Cubs: (3)'49's, (1)'52, (1)'57 IH Cub LoBoy w/FH, (1)'72 154 Number Series Loboy, '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '53 MM BG (offset), (2) '49 Avery V's, '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76 Yanmar 1500, Sears Surburban's, MTD's, Jeeps & other misc. "treasures"
Circle of Safety: Y
Location: AL (Southwest)

Re: Cooling issues !

Postby staninlowerAL » Fri Apr 07, 2017 8:10 am

The bolt sealer needs to be non-hardening like PTFE paste so when you re-torque the head bolts it will not break the seal.


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