Recently I was changing to a superram setup. I already had the base, and was putting on the top. When I unbolted the rear most lower plenum bolt on the drivers side. Coolant began to leak out of the bolt hole at a good rate. I can't remember if this happened when I did it the first time too. I did not drain the coolant when doing the install. I know there are coolant passages in the intake manifold, but do any touch this hole that some should come out. Or does this mean that there is a crack somewhere. It has very few miles on it. Thanks.

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87 GTA 350 L98
K&N filter, beefed up TH-700r4, Accel Manifold, Superram, Fuel Press. Regulator 49.5psi, air foil, modified MAF, SLP cold air box, Accel 24lb Injectors, Hypertech Thermomaster chip w/160 thermostat, MSD 6AL and Blaster 3, B&M shift kit & megashifter, Moser Ford 9in Rear with Richmond 3.50 and locker, Edlebrock TES headers and Cat Back,Gutted cat, removed emissions, Hotchkis setup in rear, Poly suspension and Koni in the front, relocated MAT, bypassed TB coolant

 

Yes, when changing the intake, you need to drain the coolant. Coolant will come out that bolt hole, it goes into the coolant passages in the head.