head gasket

Rickashaw

New User
Little help please. I had some oil in my radiator of my 8n and it was also pushing coolant out the radiator top when I would accelerate. No signs of coolant in the oil. I put a new head gasket on, also took the opportunity to put a new radiator in and hoses. I got everything back together, and now antifreeze drips out the bottom of the carburetor about as quick as I can pore it in the radiator. I checked for any cracks in the head and block when I had it apart, but did not see any that jumped out at me. Anyone have any ideas?
Thanks!
 
WHAT??? Antifreeze dripping out of carburetor??? I don't think so. Did you mean radiator? You could be overfilling the radiator in the first place. There is a draincock valve on the bottom of the radiator -is it shut all the way??? You can't tell a cracked block simply by looking at it.

TPD
 
(quoted from post at 17:09:50 05/23/17) WHAT??? Antifreeze dripping out of carburetor??? I don't think so. Did you mean radiator? You could be overfilling the radiator in the first place. There is a draincock valve on the bottom of the radiator -is it shut all the way??? You can't tell a cracked block simply by looking at it.

TPD

Well, Tim, it is possible, but not likely. Hole in sleeve, AF filling up cylinder, AF going through open intake valve coming out of carb.
just sayin'
 
(quoted from post at 19:30:18 05/23/17)
(quoted from post at 17:09:50 05/23/17) WHAT??? Antifreeze dripping out of carburetor??? I don't think so. Did you mean radiator? You could be overfilling the radiator in the first place. There is a draincock valve on the bottom of the radiator -is it shut all the way??? You can't tell a cracked block simply by looking at it.

TPD

Well, Tim, it is possible, but not likely. Hole in sleeve, AF filling up cylinder, AF going through open intake valve coming out of carb.
just sayin'
robably more likely that it just looks like it is coming out of bottom of carb, but is really running down maniflod/carb outside & dripping off bottom, due to lack of sealant around manifold bolts into block water jacket.
 

Tim, it definitely is dripping from the bottom of the carburetor, not the radiator. I first thought it had to be fuel, but it wasn't.
The tractor wasnt running bad before the new head gasket, but it was pushing coolant out now and then when I would push it. So for it to do this after a New head gasket has me baffled.
 

Remove the manifold locate the port were the coolant is leaking that will narrow your search as to what cylinder its leaking on, remove the head and find the crack in the head are a poor sealing head gasket.

Whatever the issue it beats going in blind and having some idea were to focus.

To the nonbelievers yes it possible to leak coolant out the carb... Think about it...
 

If you did not want to remove the manifold you can remove a spark plug and see the coolant leak. Too leak out the carb it has to leak past a intake valve you can see the edge of the valves look'N in the spark plug hole...

My bet its a cracked head you missed it because you did not clean the combustion chamber part of the head and assumed a crack would be on the flat gasket side of the head...

BTDT and got to do it twitch...
 
(quoted from post at 21:53:27 05/23/17)
If you did not want to remove the manifold you can remove a spark plug and see the coolant leak. Too leak out the carb it has to leak past a intake valve you can see the edge of the valves look'N in the spark plug hole...

My bet its a cracked head you missed it because you did not clean the combustion chamber part of the head and assumed a crack would be on the flat gasket side of the head...

BTDT and got to do it twitch...
xcellent, Hobo! Look in those spark plug holes.......which if any have the green juice in there?
 

It always amasses me you don't have the time to pin point the problem the first time but do the second time... :lol:

My second go round took the time too pin point the cylinder in question then focus on the combustion chamber in question buff it clean found a had a crank in the dome of the head covered in carbon...

Don't forget to read the comments :D

https://photos.yesterdaystractors.c...arameter=hobo,nc&w=pieces&cc=3&s=
 
......then focus on the combustion chamber in question buff it clean found I had a crack in the dome of the head covered in carbon...

Don't forget to read the comments :D

After reading the comments I see this must not be a question on the guru test . If I study read hard , just maybe , someday , I can get 70k posts too . :lol:
 

Thanks, I will look at it today to see if I can tell anything. One thing I didn't mention before is that this is the second head gasket that I have put on it. Last week I replaced the head gasket, started it up drove it around the field and it was still gurgling up coolant, both when I started it and when I accelerated. I hoping it was a cheep head gasket, so I ordered another one and replaced it again. I could tell this gasket seemed to be better quality. Again tried to fire it up and coolant was everywhere from the cap and it was leaking out the bottom of the carburetor. I will tear it apart today and see if I can find anything. Thanks again.
 
Did you do a complete engine overhaul or just replace head gasket? Did you torque the head to specs in correct sequence -see pic below and also post further down on head bolts. Was the head decked/fly cut machined and checked for flatness prior to re-installing ? If so, how much was taken off and were the pistons checked that they weren't bottoming out at the top of stroke? If root cause isn't the head, I suspect you have a cracked block but only one way to find out for sure...


492ca6cc-1275-4ab7-93fb-b6f01521c40c_zpsrr2ztxxz.jpg
 
I just got done ripping everything apart. The manifold was full of coolant and every exhaust port had coolant sitting in the valve ports. When I took the head off, the gasket was firmly attached to the head rather than the block, it also seemed to be flaking across the middle of the gasket where it sat against the block. During install I sprayed both sides down with cooper sealant, not sure if the head side is suppose to be sprayed. Also I found what I think is either pitting or a repair in the head, (in pic).
 

Tim, I just replaced the head gasket and the manifold gaskets, nothing more. I did torque them down in sequence and by the proper torque. Update- I just got done ripping everything apart. the manifold was full of coolant and every exhaust port had coolant sitting in the valve ports. When I took the head off, the gasket was firmly attached to the head, rather than the block. it also seemed to be flaking across the middle of the gasket where it sat on the block. During install i sprayed both sides with cooper sealant, not sure if the head side is suppose to be done.
 
"WHAT??? Antifreeze dripping out of carburetor??? I don't think so. Did you mean radiator? You could be overfilling the radiator in the first place. There is a draincock valve on the bottom of the radiator -is it shut all the way??? You can't tell a cracked block simply by looking at it."

Well it is an up draft Carb, and if antifreeze is getting into the manifold. Where do you think it would drop from? It would come down the manifold to the carburetor and leak out!
 

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