Injector O-Rings wont fit in fuel rail?

[BoostinTEG]

I bought some new precision injectors and they wont fit in my fuel rail.
My older injectors would slip right in with a little force, but with these the o ring is alot larger and gets pinched (which is bad) whenever i apply force to put them in.
how should i go about getting these in??

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[NOSLO2PT0]

Put a touch of motor oil or spit on the o-ring before you insert them. Also, spin them as you slide the injector into the rail. Don't just try to shove straight in.

 

[ExpresS]

Fuel rail/Injector CC's?

 

[Yamahaulin]

Vaseline works great

 

[WeaselHack]

I've found it easier to slip the injectors in the rail then mount the rail and injectors into the head. The tighter the fit here the better.