Intake manifold blockade?
Recently got my hands on a 273 4 barrel intake. I am in the process of cleaning I have noticed that 2 of the ports are blocked. See pictures. Question: is this intentional or just need cleaned out?
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I don’t care what’s in the crossover. It ran like that for most of its life. You can bet on that.
Guys love to stew over cold start/warm up issues but like I just said, that crossover has been blocked most of its life.
What matters is getting the cover off the bottom of the intake. That MUST come off and be cleaned.
Ive seen more junked engines because that wasn‘t removed and cleaned I can’t count them all.
Take a rounded nosed chisel and GENTLY tap on the rivet and it will come right out. If it gets a little bend it won’t matter. Just don’t chisel the head off.
Clean the living **** out of the manifold and that plate.
When you go to put it back together make sure the rivets have some press to them. If the fit in the holes like a hot dog in a hallway, take a punch and make three punch marks about 1/8 inch away from the hole.
When tapping the rivets back in, use a BIT of locktite on them and send them home.
Not taking that plate of is a HUGE mistake.
