I have retained my front seal so it won't push out when running higher inlet pressure.

Anyone know at what pressure the seal itself will fail at or begin to leak? I wanna run a second gen lift pump but don't want the seal to fail or leak diesel into my timing case and contaminate my oil...

 

With loctite, you could push around 30psi. Maybe you could higher, maybe someone else that has pushed it further will chime in.

 

I'm not using loctite. I retained the front seal with 4 little tiny (m4 I believe) large head hex head screws that overlap on the seal. Just got a machine shop to drill and tap the case for the screws. The screws are large heads but don't protrude out far from the pump. I got the idea from JQ a little while ago.

I used blue loctite to keep them from coming loose.

I'm just curious to know what the true failure pressure is on the seal itself. If anyone even knows.