OK, these can be a pain for sure. I ordered this dis-connector but it didn't work well.
https://www.amazon.com/gp/product/B07KWJP5WV/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1
I ended up using an OTC dis-connect tool that I already had. The disconnect tool has an angled handle and the round part is in two pieces. The reason this worked well for me - I could push one side of the tool into the back of the "quick disconnect". Once I got one side in good, I worked on the other side, and it was easy to push in. I even took the took back off and tried both sides at the same time, no dice. I strongly suggest using the plastic, angled disconnect tool. Now for the Dorman 800-409, fit perfect. I used the same part for both heater hoses. Yes, I replaced the tan connector with this black one. Once I got the old quick disconnects off, I cleaned the aluminum fitting on the heater core, and sparingly used some plumbers valve grease on the fitting, and the Doorman seals. Slid back on like butter - and no leaks! You'll need two of these and two small hose clamps.
This is the hose I used for the side without the Y fitting.
https://www.amazon.com/gp/product/B000C2WEIC/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1
| Size | 1 Count (Pack of 1) |
|---|---|
| Brand | Dorman |
| Color | Black |
| Item dimensions L x W x H | 5.8 x 2 x 1.6 inches |
| Exterior Finish | Ready To Paint If Needed |
| Item Weight | 0.03 Pounds |
| Number of Pieces | 1 |
| Manufacturer | Dorman Products |
| Part Number | 800-409 |
| Item Weight | 0.48 ounces |
| Product Dimensions | 5.8 x 2 x 1.6 inches |
| Country of Origin | USA |
| Item model number | 800-409 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Included Components | COOLANT CONNECT |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | Limited Lifetime Warranty |
