Leaky O-ring on fuel pressure regulator

[johnnybronco]

I just replaced my fuel pressure regulator and had a tough time getting the o-ring to seat on the fuel rail. Wound up destroying the first o-ring. The second one seated fine- no leaks. I then drove 750 miles from NM to TX in the heat - no problem. Now 2 days later, it's leaking big time. Any ideas?

 

[adsm08]

Get a new ring, replace it, and lube them good with clean fuel before putting the line back on.

 

[johnnybronco]

OK, but I'm not disconnecting the line, just taking the regulator off the rail and replacing the o-ring that goes over the regulator nipple that seats inside the rail.

 

[RustedRanger]

I used some grease on mine,tighten it down while switching sides often so it goes down even. Any grease that gets inside will just melt in the fuel and be gone.

 

[Andy D]

No experience with Ranger fuel injectors. But yellow Ford 5.0 injectors are clones of the bosch injectors and gear oil is the recommended lube for the same O-Rings. I've gotten away with lubing with the dipstick. . NAPA carries the O-rings for short money.