A co-worker lost the cap to the coolant reservoir on his 2010 Dodge Ram 3500 6.7L Diesel truck. He could not find the CORRECT part anywhere- all of the caps sold online were the same part number- and all too small for his overflow tank's opening. The washer fluid tank used the same exact lid, so he brought that to me to copy. I managed to get a good fit on the 2nd try.

I suggest printing in Nylon. I used Taulman Nylon 645. It's flexible enough to fold in half as it needs to, heat resistant, and tough.

June 2019 update: 12 months on, my co-worker says the hinge of this cap is still intact, the cap still fits snugly after several openings & closings, and the entire piece has withstood the Florida heat & humidity thus far.

Category: Automotive