B7100 fuel pump outlet valve O-rings

[Cryptohorse]

Finally did a piston replacement on my B7100. Its sort of going again but I've noticed that fuel is leaking from the fuel pump connections to the injectors. It wasn't happening before the rebuild. Upon inspection it looks as if the O-rings on the connectors are broken or very hard and need replacing. Does anyone know what size they are in terms of inside diameter and thickness?

 

[North Idaho Wolfman]

The O-ring are not your leak, the O-ring simply keep water and debris out of the delivery valve threads.
Yes replace them too, but what you need to fix the fuel issue is new delivery valve seals.

O-rings 15331-96760
Delivery gasket seals 15331-51240

 

[Cryptohorse]

Thanks for the part number for the O-rings. I have already replaced the seals. Since they have to sit flush with the top of the delivery valve to make a good seal is there any procedure required to ensure that the seal gasket and its delivery valve are perfectly matched? I just replaced the seals thinking that they would just sit on top of the delivery valve and that would be enough to seal properly. That is the only reason i can think of which would create a leak. But strangely in all three injector lines at once?

 

[North Idaho Wolfman]

Thanks for the part number for the O-rings. I have already replaced the seals. Since they have to sit flush with the top of the delivery valve to make a good seal is there any procedure required to ensure that the seal gasket and its delivery valve are perfectly matched? I just replaced the seals thinking that they would just sit on top of the delivery valve and that would be enough to seal properly. That is the only reason i can think of which would create a leak. But strangely in all three injector lines at once?

Did you torque them down per the manual?

 

[Cryptohorse]

Could not find the torque for the delivery valve hosing in the workshop manual so I used the torque for injectors instead. 22 to 36 ft lbs. Think I used 30 ft lbs. Refer fuel system specs page 7-1. Do you have a better reference?

 

[North Idaho Wolfman]

Could not find the torque for the delivery valve hosing in the workshop manual so I used the torque for injectors instead. 22 to 36 ft lbs. Think I used 30 ft lbs. Refer fuel system specs page 7-1. Do you have a better reference?

The torque spec is 4 to 4.5 kg-m or 29 to 32.5 ft/lbs.

Is the amount of fuel minor?
And are you sure it's not from the line fittings?