LB7 fuel H block

hondarider552

hondarider552

Getting faster
May 28, 2008
10,627
2
36
34
Arizona
Sprung a leak Friday night at the track and truck ran worse every pass so drove it home. Didn't leak at idle to pulled the top cp3 regulator and found the leak, coming from this plug. Did I pop the relief valve? Never seen it leak form there before so figured i'd ask. Also found this copper washer in there, not sure if it's supposed to be in there or not... :confused:

FWIW, I ran a 11.41 @ 125 with no airdog :rofl:
best pass was 10.8 @ 133.
 
Last edited:
S

S Phinney

Active member
Aug 15, 2008
4,008
18
28
Quncy, Fl
It should not be there and that is most likely why the pressure pushed fuel past it. Copper is too soft for pressures like that.
 
S

S Phinney

Active member
Aug 15, 2008
4,008
18
28
Quncy, Fl
The part that was stock is gone because the return line was deleted. It should be a metal to metal seal with no added seal points. Look at what a lly relief valve end looks like and you will see the type of contact point. You could get one from Joe at HSP or Tony at All Seasons
 
Last edited:
hondarider552

hondarider552

Getting faster
May 28, 2008
10,627
2
36
34
Arizona
Well removed the copper washer, put it all back together and ran the truck, leaks fuel at idle from the plug, so either it's cracked, or I did something wrong. Used one coming in the mail, guess I wont make the track Friday night.
 
hondarider552

hondarider552

Getting faster
May 28, 2008
10,627
2
36
34
Arizona
Got some 272 locktite in there and so far so good, went for a drive, left at 25psi and smapped my U joint in front diff on 1-2 shift, limped it back to the house no fuel leaking but a limp shaft :eek::rofl:

Got the spare one out of the attic and on the truck. gunna drive it tomorrow and see how it does. Thanks Jake.
 
You must log in or register to reply here.
Top Bottom