Which is the best way to install an injector adapter?
Injector adapter installation. I personally like to install the adapter collar onto the injector first, and then install the entire unit into the fuel rail. You can also install the adapter into the rail first and then install the injector into that, as long as it’s all lined up properly.
What should the sound of an injector cap be?
Give the injector a spin once it’s in the rail and listen for the sound of rubber clicking/settling. It should be pretty much silent, but any sort of “clicking” is also a sign of pinched O-ring. Once you’re happy with the fitment, you can go ahead and install the caps.
Where is the pintle cap on an injector?
The only other thing to note is where the lower injector O-ring mounts on the injector, which is between the plastic protector cap at the end and the plastic collar on the injector body, like this: Note the location of the lower O-ring. Keep in mind, on old-style injectors, the pintle cap is not hugely necessary.
How is an injector installed in a rail?
Injector fully seated into the rail. When the injector and adapter assembly is installed into the rail, it’s important that it’s seated fully in the rail without requiring additional force. If you have to draw the injector in with the cap, that means it’s not seated correctly and an O-ring is likely pinching.
Injector adapter installation. I personally like to install the adapter collar onto the injector first, and then install the entire unit into the fuel rail. You can also install the adapter into the rail first and then install the injector into that, as long as it’s all lined up properly.
Why do I have to draw injector in with cap?
If you have to draw the injector in with the cap, that means it’s not seated correctly and an O-ring is likely pinching. Give the injector a spin once it’s in the rail and listen for the sound of rubber clicking/settling.
Injector fully seated into the rail. When the injector and adapter assembly is installed into the rail, it’s important that it’s seated fully in the rail without requiring additional force. If you have to draw the injector in with the cap, that means it’s not seated correctly and an O-ring is likely pinching.
The only other thing to note is where the lower injector O-ring mounts on the injector, which is between the plastic protector cap at the end and the plastic collar on the injector body, like this: Note the location of the lower O-ring. Keep in mind, on old-style injectors, the pintle cap is not hugely necessary.