Re: changing the plentum - Bnaylor?

[RASCARS]

I was researching a potenial plenum issue and noticed your reply back in July. Here
Would you mind sending me the same info you sent the member concerning the steps of changing the plenum?
I would be most grateful.
My Email address is: [email protected]

Happy Holidays!!
Bob

[BNaylor]

Happy Holiday Season to you too. File sent. Good luck.

Here are some FAQs and general questions I get concerning the procedure which covers the UIM and LIM:

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Prior to removing the fuel injectors rails should I disconnect the fuel supply pressure and return lines?

It is up to you but it is recommended to leave the fuel supply pressure and return lines connected to the rails.The fuel rails are removed intact with the fuel injectors. Once removed just set it aside or tie it up where it will be located out of the way. Another recommendation depending on your mileage is to replace the upper and lower fuel injector o-ring seals. Also, if the fuel supply lines are disconnected it is recommended to replace the o-ring seals. A special fuel line compression tool should be used.

I talked to a shop to get an estimate as to cost just in case I decide not to do the work myself. The mechanic told me that certain pushrods will need to be removed in order to remove the lower intake manifold (LIM). Is this true?

This is false. On the SII 3800 which is a GM 90 degree engine the pushrods go through the cylinder heads from the lifter galley therefore no need to remove the pushrods to remove the LIM and worry about adjusting rockers.

However, the GM 60 degree engines like the 3100/3400 require removal of 3 pushrods per bank in order to remove the LIM but that is irrelevant to the SII 3800.


SII 3800 Vin "K" and "1" with UIM, LIM and all pertinent parts removed

What aftermarket companies supply the improved UIM Plenum?

Dorman
Ken-Co
MotorMite

What GM Technical Service Bulletin covers the UIM EGR Stovepipe problem on 95-98 GM cars with the SII 3800 engine?

GM TSB # 01-06-01-007A dated 07/18/2001