Dreaded GM 3800 intake manifold gasket problem?

[DC44]

Not sure, exactly but they are probably injecter rings, I can't remember how many orings were on the injecters when I did my UIM, but to be honest I didn't even replace them. Nothing happened.

You may be better suited visiting a 3800 forum for more detailed instructions. You should replace the LIM gaskets at the same time. It is a 100% chance that they have some type of external or internal leakeage even if its very minor.

 

[Trav]

Can you post a pic of these?

 

[jake111]

Ooops, never mind. Looks like they are for the injectors. (I'm from the carburetor generation.) Thanks for the replies!!

 

[Trav]

Quote:
The kit has 12 blue orings and 6 sleeves about the size of the orings

Yes the blue O-rings are for the injectors, i was wondering about these 6 sleeves.

 

[jake111]

I bought lower injector orings from Autozone and Napa (each store had 1 pkg of 4 orings in stock) which are thinner than the blue ones, and look exactly like the old ones that came out of the motor.

I believe the blue ones in the kit might have worked between the injectors and the fuel rail, but I'm not sure because I didn't disconnect them.

The other 6 blue orings and the sleeves (called spacers in another article I found) look like they are for a different injector model, probably just for a different year (perhaps from the 90's).