Fuel Injector rail torque
#1
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Fuel Injector rail torque
Replaced all seals on stock Fuel Injectors as part of starter replacement.
The fuel-injector supply rails each have 2 nuts that pull the rails down onto the injectors.
My question is:
How tight are the nuts suppose to be? Obviously, they need to be tight enough to seal, but it is difficult to know when to stop tightening so I don't crush the seal where the injector sits into the bottom plenum section but tight enough so they don't leak as they age. Does the FSM list a specific torque? I'd anticipate it might only only be in inch-pounds since it is tightening against the rubber seal and not metal on metal.
Without a torque spec, I'd guess I should tighten them so that all injectors could no longer be rotated with my fingers (barely sealing against the plenum) and then tighten a bit further. However, that seems kinda sloppy and allows for too much guesswork.
Can anybody with a FSM offer advise on what the bible says?
Thanks
The fuel-injector supply rails each have 2 nuts that pull the rails down onto the injectors.
My question is:
How tight are the nuts suppose to be? Obviously, they need to be tight enough to seal, but it is difficult to know when to stop tightening so I don't crush the seal where the injector sits into the bottom plenum section but tight enough so they don't leak as they age. Does the FSM list a specific torque? I'd anticipate it might only only be in inch-pounds since it is tightening against the rubber seal and not metal on metal.
Without a torque spec, I'd guess I should tighten them so that all injectors could no longer be rotated with my fingers (barely sealing against the plenum) and then tighten a bit further. However, that seems kinda sloppy and allows for too much guesswork.
Can anybody with a FSM offer advise on what the bible says?
Thanks
#2
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Thread Starter
Not a bump, but on another forum, I found another posting that said he "thought he remembered" the 1UZ fuel rails get tightened to 14 ft-lbs.
Can anyone confirm?
Can anyone confirm?
#4
My left fuel rail had a heli-coil in it that I discovered upon disassembly for a fuel leak/odor problem. The heli-coil was n't inserted all of the way, causing the leak Put it on the milling machine and removed .003 and cured the problem.
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