I've been fighting a leak in my Simflo fuel pressure regulator that came with my Wideopen Diesel Walbro pump kit. The leak is coming from the rubber O-ring seal area. I've tried replacing the rubber O-ring numerous time with no success. What could I be doing wrong?

Mark

 

sounds like the machining is not right, are surface rough, too much clearance ??

it is fixable some way.

 

I've taken the Simflo out a few times and inspected it but haven't found anything irregular with it. For some reason the rubber O-ring isn't sealing the threads. I assume that is what the O-ring is for...to seal the fuel from leaking out of the regulator?

Any ideas?

Mark

 

Im having this same problem after adjusting my fuel pressure. Anyone know what the size of the o ring is by any chance??

 

I got more of the o-rings from the hardware store's plumbing department. I took the old o-ring with me to make a comparison.

Mark

 

alright thanks thats probaly what I'll end up doing.