So I just replaced the head gasket on my '95 Pontiac Sunfire 2.2, replaced all gaskets inbetween and decided to make use of the incuded o-rings for the fuel injectors.. Thats where my problems started. The car runs fine but fuel seems to leak out of the top of the injectors while I was letting it Idle in the driveway, I took the whole thing apart again and reseated all of the injectors, pushed them so they where flush with the intake manifold, but still leaks. The second time I also used some petrolium jelly to aid in installation and checked and both top and bottom o-rings looked fine. I used the included rings with my fel-pro kit. No fuel leaking from the top of the fuel pressure regulator, just the back of the gaskets.
I just bought a new fel-pro ring kit and will take it all apart once again and try it one more time tomorrow, any advice?
-Chad
I replaced all 8 O-rings today with new ones (Fel-Pro again) and it was fine, ran it for awhile. Then turned the ignition on later and it was leaking gas again around the top edge of the injectors again. Any ideas here?
-Chad
Quote:
This may sound dumb but did you make sure you got thew old o-rings out?
Yup, have two old sets now, along with a set on the car that is now bad, or seems to be. Could it be the fuel pressure is too high for the o-rings to hold? I have not changed the fuel pump or regulator at all, so I'm not sure if those are at fault or not.
Those o'rings ought to be able to handle up to 70 psi or more, the 40-ish that the stock pump produces is not enough to blow a good o'ring. Get some o'rings from the dealer. Fel-pro makes good gaskets for the most part, but some of their designs aren't so good (exhaust manifold gasket to name one, stock is better in that case). You DID seat the injectors fully and put the retainer clips on correctly I assume?
Uhm..... for another dumb question. On that engine there's a retainer that slides over the injectors, and then bolts down (which you need a hex to get out). Did you put that back on over the injectors? Without it, they'll push back out and start to leak.
It doesnt have retainer clips, it's got one piece that runs down the whole intake manifold/fuel rail.
Another difference between the 2.2 and the 2200 is revealed to me. Thanks SHOoff!
(starting to know where you got your name from haha
)
BTW, that sounds like a better design, why would GM change it to individual clips on the 2200? Injector design change perhaps?
Edited 2 time(s). Last edited Sunday, July 08, 2007 1:14 AM
Yes, took the torx bolts out (T-30 Actually) of the retainer bar, pulled out the injectors, replaced the o-rings, reseated them so they where flush (That was a chore) then replaced the bar and tightened the torx bolts.
So if I go get o-rings from a dealer will I need a part number? How long does that typically take to get?
Thanks,
Chad
The dealer would likey have them in the back, so only as long as it takes the guy to walk back there and pick them off the shelf.
Either way, much faster than GMPD.
Went with the GM O-rings, $25 from my dealer, but that cleared up all the leaking.
Thanks for the help!
-Chad
Hmm, that doesn't sound all that expensive. Glad it worked out for you.
