Thread: Kind of a Drag
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04-09-2016 05:57 PM #106
My post about holes in the cap are for visual confirmation of the phasing of the rotor lug to the terminals in the distributor cap.
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04-10-2016 06:39 AM #107
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04-10-2016 07:15 AM #108
Internal (underside) intake manifold vacuum leaks can usually be verified by sealing the valve cover breather port (tape) on one valve cover and feeling for vacuum at the other valve cover port (usually where the PCV is located), lightly place finger over the open hole while the motor is idling. Any pull or vacuum felt is usually from the leak on the underside of the manifold.
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04-14-2016 12:47 AM #109
Thanks Glenn, it’s believed to be a Gen 5. 454. I’ll see if I can snap some pics of the stamped and cast numbers and post them here. Maybe we can define the year and model
GM Engine de-coding