Radiator fluid on the back of the coach

[katoommaster]

I got home this weekend and noticed I had radiator fluid on the back of my pusher. I was not below the add line and I did not have my coach over filled. Any Ideas ? my tempature was running between 170-180 I think thats ok? (300 ISB Cummins) 59,000 miles only on it

[Martind4]

You could have a pinhole leak in the plastic coolant tank. The UV rays will damage these tanks over time causing them to get brittle and leak. We replaced ours when it was about 8 years old, others have done it sooner.

I'd wash off the antifreeze, run the engine to operating temp and get out the flashlight to find the source of the leak. Let us know what you find.

[RinkersRanch]

How long since you replaced the radiator cap? This is a weak link in the coolant recovery system and the seals get very weak after 3-4 years. Instead of pushing the coolant into the recovery bottle it leaks out at the neck. I totally agree with Martind4, just be sure to look closely at the rad. cap.
Just a short story if I may. I was fighting coolant loss in an old Dodge van. Smelling coolant and loosing a couple of quarts every 20 - 30 mile trip. One Saturday morning I'm looking diligantly to find the leak and my 6 year old little girl ask 'daddy what is that green stuff dripping there? Well 'there' was the filler neck at the front of the radiator. The coolant was leaking from the cap at the front of the radiator and when it hit the core the fan spread a coolant mist everywhere. So my little girl found my leak. Ever since then I have carefully checked the cap when looking for phantom collant leaks.

[Jim Stewart]

The other potential leak point is where the low coolant sensor goes into the tank, that was where mine was leaking and it needed to be tightened. It would drip and the fan would spray it out the back!

[katoommaster]

Great tips I will keep you all posted thank you

[katoommaster]

Good News!!!!!!!!!!!!!!! Thanks for the Help, I found a small pin hole in the Tank. This is why I love this site what a big help. I was all over and under my coach looking for a leak and low and behold it was at the overflow tank the whole time.


Now I need to find a new tank and recommendations???????????

[Martind4]

If it's a Freightliner chassis, call the Service Center in Gaffney, SC for the best price/service. They'll want to know the last 6 digits of your VIN and they can tell you exactly what style tank you have. The number is 800-385-4357

If it's not a Freightliner chassis maybe someone else can help.

[katoommaster]

I am on a Road Master chass, Thanks anyway maybe some one else can help

[katoommaster]

Orderd my Coolant Recovery tank today from De Martini RV in Grass Valley, California
1-530-227-1921 $ 264.00 to my front door I think it may be a little pricey but I will have it in 2 days

Thank you all for the help locating my problem and what I needed

[katoommaster]

Just a note for all coach owners if you buy a new coolant recovery tank for a monico and it is a 2001 you will need to buy an aditional single wire sensor becouse the new tanks sensors come in at the side and not the top. They are about $60.00 and I purchased the part at a local truck parts shop.

Also the inlet and outlet at the top of the tank is now threaded in, so you will also need to replace them and that was about $8.00 for both.