Coolant reservoir location

[jetlag]

So, this sounds stupid, but I cannot find the reservoir to add antifreeze. I have a '21 Ram 3500 with the Cummins, not HO, engine. I have gotten an intermittent coolant warning light a couple of times, but do not think I am leaking fluid. It could be gremlins in the electronics. I went ahead and bought some antifreeze, and for the first time in my 70 years cannot find the reservoir in a car/truck.

 

[JustMeAndMy3500]

Passenger's-side , against the firewall.

 

[jetlag]

Passenger's-side , against the firewall.

I saw the transmission reservoir near there.

 

[AH64ID]

I saw the transmission reservoir near there.

There isn’t a transmission reservoir, only a transmission dipstick.

 

[jetlag]

There isn’t a transmission reservoir, only a transmission dipstick.

Ok then, the fluid in that reservoir looks just like transmission fluid in color

 

[oppizzippo]

Ok then, the fluid in that reservoir looks just like transmission fluid in color

RAM loves their purple/red coolant.

 

[jetlag]

Oh boy, I may have added about a pint of transmission fluid to the reservoir.

 

[AH64ID]

This is the coolant reservoir

 

[oppizzippo]

Sounds like your truck is going to get a coolant flush done. We use Cummins branded coolant from the Cummins dealer over the RAM stuff in our 6.7/5.9s. If you do it yourself look into one of these: https://www.cpsproducts.com/product-details/550000/ makes refilling a breeze and prevents air pockets in the EGR cooler.

 

[JustMeAndMy3500]

Familiarize yourself with the symbols on all the covers/caps. There is a "Hot" and a "Coolant Reservoir" picture on the coolant cap. The owner's manual is great bathroom reading too.

 

[jetlag]

Thanks to all, I have a tow truck on its way and on to the dealer then. This all stemmed from a couple brief warnings concerning low antifreeze level in the last month. It may well be a sensor issue

 

[jetlag]

update- truck is at the dealer. system getting flushed, should get it back this morning

 

[jetlag]

One more update. The phantom warnings I had mentioned were caused by a bad sensor. This sensor happens to be installed inside the reservoir and only was to fix was to replace the reservoir, $310, so the system was drained, flushed and fresh antifreeze,$110, added. After labor it all came down to a cool $810, ouch.

 

[oppizzippo]

Glad it all worked out!

 

[jetlag]

Thanks, my pocketbook is sorry, but it could have been much worse. The service tech at the dealership was great and took us in as soon as the tow truck delivered it.