Hey all i need some sort of direction on this 05 4.0 mustang motor... it was rattling on start up when bought. So we changed the oil .
Then it still rattled pretty good on start up so we decided to change the tensioners. The front one went in easy and when i started the car no problems
The rear tensioner would not seal properly no matter what i tried. So we bought a oem tensioner and tried that ... it as well leaked . So i put the crimp washer on the oem one and finally got it to not spit...

Loud clicking o startup