Hey Buick community, I just pulled the intake manifold and some questions came up that "the book" could not answer..(350-2/5.7) 1. Looking at the intake, there are the different channels for coolant, fuel/air Mixture and left/right of the exhaust heated air, two more which are greasy and dirty... Any idea what this is? 2. The gasket kit includes two rubber stripes for the front and the rear upper edge of the engine block..should I use these and fix them with RTV or throw them away and use RTV only? 3. Once it is all open.. is it worth to take out and check the pushrods and lifters? Maybe clean the lifters?
EGR ports. Someone may help you with info on blocking them off. Be very careful with the lifters. You can "work" junk/grit into them, and also further into the engine, (risking bearing damage on start up) and if you fully disassemble the lifters, clean, inspect and put them back together, make 100% sure you keep all parts "married" to each lifter, and numbered to each correct lobe on the cam.
I've always used the rubber seals, but RTV the corners (I think that is what the book says to do). Never had them leak.
Yes on the engine block Part.. but looking at the intake manifold there is one opening at the driver side..
Ahh... I thought "..and left/right of the exhaust heated air..." OP was asking about the two holes inside the exhaust crossover, and then about cleaning the grime out of the casting. "... two more which are greasy and dirty....".
Ok thank you. I was just wondering how all that greasy sludge got in there, and why one side looks different than the other. I guess that only the engineer knows what he designed..
