I just did plugs at 110k miles on the wife's 2010 Mountaineer 4.0. It runs great now (I waited too long I know) I did good except I broke what looks like a vac check valve that goes into the firewall on the passenger side. It just fell apart when i touched it. I glued the two halves back together to eliminate any leaks, but now on acceleration I can hear the vac hissing back out of the HVAC system. So, I need this valve. Anybody have a good part number or source? Thanks!

 

Motorcraft YG360

 

Thanks. I have that in the cart, just wasn't sure if that was the one. I seem to remember this going bad on our explorer as well. Under warranty that time though. Thanks again!

 

I used to buy them from McMaster Carr back in the day (BA - before Amazon). They were way cheaper from McMaster than the dealer. No minimum buy and no handling charge, just UPS. Buy extras and keep them on hand.

McMaster-Carr

 

This particular valve has two different size hoses one going into a hard line. I could make one of the universals work, it just wouldn't be my first choice. I am hoping under that tape is a rubber section before the hard line comes out so I don't have to cut and splice.

 

Update: got the new Motorcraft check valve mentioned above. It is the correct part for the truck. It has slightly larger fittings than the one I replaced, but the one I replaced was a replacement from the ford dealer about a month after we bought the truck new. There was a short piece of hose in there to adapt it to the truck. Removing this hose allowed the proper valve to plug right in. I forgot that happened when it was new,but its all coming back to me now! Thanks for the help.