B6000 pushing antifreeze out of drip tube

[wapiti39]

Hey all
I have not posted for sometime now. I had a thread going in regards to a b6000 that I cannot get started, which is currently in the shop getting an estimate for an engine rebuild however in the interim I picked up a basically brand new ( old 1992 model) B 6000 that appears to have a new loaded and tiller attached well. Paint, tires, hoses, all hardware appear to be new or redone. Turns out its a grey market tractor ( zen noh) with the rice patty tires. It has been running well and I have thoroughly enjoyed having a running tractor around the place for help. I have placed roughly 6 hours on it so far and just noticed it has begun to blow antifreeze out of the little tube from the collar of the radiator. Thanks to this site I know it's a thermo syphon style cooling system which requires the fluid to be above the top hose to function properly.
I checked this and it was a bit low, filled it but it still spews fluid. I have noticed the cap has a small section of rust in the center that the previous owner had covered with some form of metallic tape. The tape is no longer sticking so no longer blocking the hole. Would this cause a pressure issue that would keep the thermo syphon system from working properly and causing the fluid to overheat and drip out of the mentioned tube? Thanks for all of your time and insight. I will try a post some pictures soon, I know we all love pictures.

 

[North Idaho Wolfman]

Yes if there is anything wrong with the cap it can overflow, It needs to maintain pressure in the radiator for it to work properly.
So first replace the cap!

 

[handyman]

Totally agree with Wolfman. Handy

 

[Bulldog]

If it was mine I would drain the coolant and flush out the system with clean water. Then refill with proper 50/50 mix and install a new radiator cap.

 

[wapiti39]

Excellent, I will do as suggested and post the results. Thank you all for your input and quick responses.

 

[wapiti39]

Just a quick update (kinda). The radiator cap is on order, just waiting for its arrival to test the fix. Thanks again.

 

[lsmurphy]

http://comancheclub.com/topic/41263-prestone-warning-plz-read/


Read before you use 50/50

 

[Lil Foot]

Motorheads I used to work with told me it is very common for people to flush the cooling system with water, and then not drain all the water out before refilling with coolant, thereby diluting the mix. (usually the block stays near full)
I have only used 50/50 mix in my B7100, stored in an unheated garage and it has seen -18F a couple of times with no problems.

 

[wapiti39]

Thank you all for the information, definitely something to keep in consideration when changing the coolant. I will pick up an antifreeze tester just for peace of mind as well. Thanks again.

 

[Bulldog]

I will pick up an antifreeze tester just for peace of mind as well.

Keep in mind that antifreeze never looses it's ability to keep from freezing but it does loose it's ability to dissipate heat.

 

[Lil Foot]

Keep in mind that antifreeze never looses it's ability to keep from freezing but it does loose it's ability to dissipate heat.

And it's ability to stop corrosion.

 

[North Idaho Wolfman]

And it's ability to taste great and be less filling..... Oh wait I think that's a beer slogan????

 

[wapiti39]

Update: The new radiator cap finally arrived today so I immediately swapped it out when I got home from work ( I have not drained and flushed the radiator yet, but still plan to do so soon). I let her run for a good 30 minutes and not a single drop out of the tube. Appears that was the issue after all, thanks to everyone for your input and suggestions. One of the best parts of this tractor adventure is the fact I get to learn a little more everyday. Thanks again.

I have ( attempted to at least) uploaded a pic as promised, pardon the poor quality of the pic.

 

[Bulldog]

Hope that's all it takes to fix it. That sure is a clean looking little fella. Brings back memmories of my 7100.

 

[wapiti39]

All
Due to certain Circumstances in life I need to sell this tractor, probably only put about 4 hours on it since I purchased her. I wanted to post here for this group before I posted locally. Please let me know if you are interested. Thank you all in advance.