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Quickest & cheapest thing to do is run a cheap borescope down the spark-plug holes & assess the cylinders visually. If it ran last year, and you can turn it by hand at the pulley, then it’s fine. The risk to the rings arises when it’s really stuck fast. For peace of mind, spray some penetrating oil in each cylinder and hand-crank it through a couple revolutions. If you squirt motor oil into the cylinders, use something lightweight and put less than half a shotglass in each one. Let it sit overnight & then turn it through a few revolutions. Pontiac loves to mount the drain plugs like that. Occasionally, I’d pour a quart in the top while it was draining, to push out more old oil. Usually don’t bother, though. In your case, try to mount it on a stand so it is tilted towards the drain a bit. For what it’s worth, I’ve been running a pontiac 389 like that for 24-years. It doesn’t leave enough old oil behind to be a problem PainterofCrap fucked around with this message at 06:01 on Feb 20, 2024 |
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Feb 20, 2024 05:55
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| # ¿ May 13, 2024 06:46 |
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Remove the float bowl & clean the crud & water out of it. Shoot some CRC around the float & seat, etc while it’s off.
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Apr 26, 2024 02:34
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