Does fuel injector o ring size matter
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
Does fuel injector o ring size matter
I took my fuel injectors back out today.
I did not see any reason why they should be leaking.
They were in good and none were torn.
I did notice that they turn very freely on the injector.
Could the ID be wrong?
I have Bosch III injectors from a mustang.
I bought the o rings from GM stealer.
I did not see any reason why they should be leaking.
They were in good and none were torn.
I did notice that they turn very freely on the injector.
Could the ID be wrong?
I have Bosch III injectors from a mustang.
I bought the o rings from GM stealer.
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
I've been using the ones gm sells that are blue. They are a tick bigger than the older black ones. While both will seal the slightly bigger ones also make it tighter on the inj. I have seen Jon (fic) stating he has/sells oversized ones. I don't know about the length of the inj. you have, they may not be going deep enough into the intake or rail.
Supporting Vendor
Joined: Mar 2008
Posts: 1,762
Likes: 14
From: Cumming Ga
I've been using the ones gm sells that are blue. They are a tick bigger than the older black ones. While both will seal the slightly bigger ones also make it tighter on the inj. I have seen Jon (fic) stating he has/sells oversized ones. I don't know about the length of the inj. you have, they may not be going deep enough into the intake or rail.
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
But your biggest problem is the way it fits in the manifold. Its too low causing the injector to not go up in the rail far enough for us to be comfortable.. It could cause a fire very easily if the fuel pressure spikes up and they start to leak.. Don't take any chances.. Send them to me I will set them up for the TPI for 25 bucks including all new viton rings and the ring to make the seat higher. I will send them back same day as I get them.
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
for our bosch 3 we use a o ring that is ford diameter inside and GM outside.. They work fine.. But your biggest problem is the way it fits in the manifold. Its too low causing the injector to not go up in the rail far enough for us to be comfortable.. It could cause a fire very easily if the fuel pressure spikes up and they start to leak.. Don't take any chances.. Send them to me I will set them up for the TPI for 25 bucks including all new viton rings and the ring to make the seat higher. I will send them back same day as I get them.
So the orings from GM don't work(i got the blue thick ones)?
Supporting Vendor
Joined: Mar 2008
Posts: 1,762
Likes: 14
From: Cumming Ga
the ID is a tiny bit to big. They will seal as long as they are flat, so when putting them in use Vaseline , just try not to have them umbrella in the rail. I am not recommending that you use them, You are really taking a chance with those, they could leak at any time.. Fires really suck. Do it with the right parts.
Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
the ID is a tiny bit to big. They will seal as long as they are flat, so when putting them in use Vaseline , just try not to have them umbrella in the rail. I am not recommending that you use them, You are really taking a chance with those, they could leak at any time.. Fires really suck. Do it with the right parts.
I want to do it right, should i go get ford o rings?
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Thread Starter
Le Mans Master
Joined: Oct 2008
Posts: 9,758
Likes: 49
From: Houston Texas
FIC is AWESOME
