4430 air in coolant

young tractor · Jan 16, 2023

Hi guys. I sent in my radiator to have it cleaned. I put it back in and put new thermostats in it. Is there anyway to purge the air out of the system. I dont want to over heat it because I didnt get the air out. I ran it for a little while but Im in Minnesota so I dont think it got warm enough to open the thermostats and cycle the coolant through the system. The top hose on the radiator was warm but the lower hose was still cold. Will it eventually work the air out of the system? Will the temperature gauge read correctly if there is air in the system. Thanks a bunch for your advice.

paulsamwel · Jan 16, 2023

With tractor not running you can loosen thermostat housing where its attached to the engine and start filling radiator with coolant till it starts flowing from thermostat housing then tighten thermostat housing.If it has a cab you'll need to purge the air from heater hoses.I do that by removing heater hoses from heater core in cab roof and directing hoses into container.Start tractor and let it idle,when coolant starts flowing from heater hoses reattach to heater core.You will have to refill radiator as those long heater hose hold a lot of coolant.This works for me.
Paul

young tractor · Jan 16, 2023

Ok thanks. I will get after the heater hoses. I already put together the thermostats. I should have done that when I put them in.

620 John · Jan 16, 2023

Me personally I just run them with the radiator cap off for a little bit. Turn the heat on full blast in the cab to get it circulating in the heater core. Throw some cardboard in front of the radiator if you can't get the temp up

This post was edited by 620 John on 01/16/2023 at 04:55 pm.

wore out · Jan 16, 2023

(quoted from post at 17:53:51 01/16/23)
Me personally I just run them with the radiator cap off for a little bit. Turn the heat on full blast in the cab to get it circulating in the heater core. Throw some cardboard in front of the radiator if you can't get the temp up

This post was edited by 620 John on 01/16/2023 at 04:55 pm.

X2.
NO need for any more complicated steps or drama, IMHE.

Al nickel · Jan 17, 2023

I have never worried about a thing like this !!!

4520BW · Jan 17, 2023

I loosen the port in back of head where temp sensor is and let air out as i am filling.

Fordy20 · Jan 17, 2023

I always drill a small hole in the thermostat flange - just small so if any air is trapped it can escape.

miangus · Jan 17, 2023

I used to drill two small holes in thermostats on GM cars after I noticed that OEM GM thermostats had a small cut out on the side for venting air. My 69 Camaro will not bleed out the air without the hole unless I get it pretty hot.

Fixingfarmer · Jan 18, 2023

If your concerned wait overnight with the coolant cap loose. I think most thermostats for tractors have a small hole in the flat middle section usually with a little metal triangular stopper of sorts that lets air bleed thru. No drilling needed. I knew someone who used to install one thermostat each way on a dual thermostat system so he wouldnt ever put both in the wrong way. A lot of housings are made so the right direction is self explanatory

shanker · Jan 18, 2023

already mentioned to use thermostats with a "jiggle valve"

or run Mr. Gasket 4367 thermostat (this is the correct P/N for my 4230) and is a great copy of the old Robert Shaw thermostat's that I'm confident were OE for Deere in the 60's and 70's (and possibly 80's)

They are provisioned too with an air bleed.

Flow Kooler (top manufacturer of Water Pump impeller's for high horse power hot rods) I think is the only company selling Robert Shaw thermostats.

https://flowkoolerwaterpumps.com/collections/thermostats

shanker · Jan 19, 2023

just wanted to post another source for Robert Shaw thermostats (as they don't sell direct to consumer)

https://www.stewartcomponents.com/index.php?route=product/category&path=61

4430 air in coolant

young tractor

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young tractor

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wore out

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Al nickel

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4520BW

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Fordy20

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miangus

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Fixingfarmer

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