I have a fuel leak in between one of my primary fuel injectors and the fuel rail and i have been having trouble getting it to seat. I recently replaced all of the seals and i have a feeling the issue is that since i did not use vasoline on the o-rings, they did not seat properly (Even though they worked perfectly for a week). I was going to pull it all apart again the weekend but i was wondering if anyone knows the dimension of the o-ring between the fuel injector and the fuel rail? I was think about not buying Mazda ones.

 

No one knows this fact? I changed to bigger Fuel Rails myself and when re installed, 3 injectors leak, it's not so much as them seating right but they get cut when forced in wrong and not lubed.. I'm actually about to go to Auto Zone and get their universal kit for less than $10 that has 6 of each different sizes and see if they work..

 

just buy a new stock Mazda part, or get the set at Rock auto ...

 

Well lemme tell ya the Auto Zone 30 count variety pack works perfectly with no leaks for about $5 and in stock. All that really need replacement are the o rings on top of the injectors to the fuel rails that have the most pressure and this pack comes with 8 of the brown ones that fit in there just right, Rock Auto isn't a bad idea, you just have to wait for them and it would be around $20 with shipping, there is also kit on Ebay for $30. I'm sure they are better OEM like compared to the ones in the Help isle but ey, not bad for what they are worth, don't know the actual size for them tho..

 

if u need them in a hurry then i guess autozone is ur only hope.

who cares about the size as long as there is no leak its all good