fitting some STI injectors to my 2001 wrx and was just wondering is it necesary to use new o-rings. also does anyone have any tips or advice for fitting them.

 

Should always use new o-rings & gaskets on whatever you rebuild. I think there easier to fit than on the classics as Ive just found out today.

 

Inspect the o rings for nicks, or damage. If they are ok, they will be fine to re-use.

Make sure they are clean, and oiled, or greased, and make sure the holes they fit into are also clean.


Mark.

 

sometimes they are damaged by deformation. if the case, fit news, Viton made of.

 

I've just fitted a set and the best advice I can give is to replace the O-rings, and grease the new ones lightly before going in. I just plonked the old ones back in and had to fit 3 of the injectors all over again because they were leaking. You may well get away with the old O-rings but for a few quid you may as well replace them while they are out. I always get taught the same lesson when I play with my car, do the job properly or do it twice