Re: 56 400 loss of power

Posted by Leeedy On 2018/8/10 14:41:32
Quote:

Jack Vines wrote:
Quote:
it may very well be that you've spun a crankshaft bearing


"Spun a crankshaft bearing" is when the bearing locks on the shaft and spins in the block or the rod.

FWIW, most well-used Packard V8s have severely worn main bearings, especially on the center three, but I can't remember seeing a main actually spun in the block. Can happen; we've just never seen it. That would make a dull thudding sound.

As to spun rod bearings, that makes a terrible noise clanging which leaves no doubt as to what has happened.

jack vines


Yesssss...I know all this. Not talking theory here. AND... had the lovely experience of being on a cross-country trip in a 1956 Packard when it occurred... in the 1970s. AND was there when the engine (which supposedly was just rebuilt before it happened) was torn down to examine the damage. Yes, painfully aware of what it is and how it sounds etc.etc.etc. I've owned a lot of cars over a lot of years. Not a young guy.

AND I've written an awful lot of service procedures on a professional OEM level for car companies over many many years.

But got news for ya... spun bearings don't always make huge noises.

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