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04-12-2011
I removed the plenum since I'm replacing some gaskets on my 98 GTP. Under the plenum there are 4 water-jet pockets and two are blocked by some kind of material. Its hard to tell if they are supposed to be blocked or not. It looks like some filler material so I poked a hole through it with a screwdriver. I either need to repair those hole seals or open them. It seems kind of weird so what do you think?
04-12-2011
PCV
EGR
Coolant ports
04-12-2011
Is is an orangebronze color? If so could be the all to notorious GM dexcool.
Originally Posted by TLSheff
04-12-2011
Look at the bottom of your intake manifold. Only two of the holes actually pass coolant through. Clean all the built up crap out of the two plugged holes to stop it from breaking loose and plugging up your cooling system.
04-12-2011
Those are your throttle body coolant passages. A lot of people usually block them off anyways, But to do that you usually use a filed dime. Like stated above clean the stuff out and put it back together. I doubt that the gasket material will plug up the collant system.
04-13-2011
L36/L26 manifold doesn't have the recessed areas for the coolant o-rings like the L67 manifold does. It's best to use 1/4" NPT pipe plugs w/o heads.
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