i installed denso 720cc injectors and when i started up my car i noticed fuel leaking out of injectors. i put new o rings in and tried again and it still leaks.

what can i do to get the injectors to stop leaking.

 

Check the o-rings to see if thier damanged, and make sure to grease them or it wont work!!

 

grease them with synthetic grease>

i put motor oil on the o rings when i installed them.

do the denso 720 use the stock injector boots.

 

If you put them in dry chances are at least 1 o-ring will break and leak.

 

what is the correct size o ring i need.

do i put grease or oil on the o ring.

i wanna get this right this time

 

bump

 

We used dielectric grease on mine. if the stock ones are fine use em..

 

Recommend just getting the stockers from a dealer. When I replaced mine I used the aftermarket ones that came with my new injectors and they leaked. Pulled them and reinstalled with the stock ones and have been good since.