Coolant question

Jmr236 · Nov 10, 2020

This may be a dumb question but today I cranked up my John Deere 4040 and let it run for about 15 min. While it was running I noticed some coolant starting to drip out of the radiator cap. It was not gushing just some steady drips. I let it cool down for a min and let the pressure die down and unscrewed it and put it back on. I noticed the level looked normal and I made sure the cap was correctly back on. I cranked it back up and let it run for about 10 more minutes and no issues. I looked at the coolant level again and it was at the same level. It was very humid today where I’m at. I’m also not certain if the cap was just not correctly on the first time. Never had this issue before and was just trying to see if this was anything to worry about. I didn’t know if the humidity can cause there to be extra pressure in the tank and cause it to boil over. Like I said after taking the cap off and putting it back on I did not have any issues.

dpendzic · Nov 10, 2020

a low pressure storm environment can make fluids boil at a lower temperature

Billy Shafer · Nov 10, 2020

May have been some dirt or it just didn't seal. I have had that happen at times.

matthies · Nov 10, 2020

The brass washer of the radiator cap are known to crack. So just take a look.

Northvale PA · Nov 10, 2020

My JD 2010 would force coolant up out past the cap when running hard. Eventually the water pump shaft bearing went out 100%. I believe what was initially happening was air was sucking into the system past the bad seal. Could be your problem. A slowly failing seal and bearing. Maybe keep an eye on it.

Coolant question

Jmr236

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dpendzic

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Billy Shafer

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matthies

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Northvale PA

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