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Boro

5 or 9 Main Bearings?

Quite a regular

I did a search and just couldn't track it down. Fairly new Packard owner here. Without dropping the pan, how do I know whether my Thunderbolt engine has 5 or 9 Main bearings?

I have a 1952 Packard 300 Touring Sedan (4dr)

The exploded engine view on this site shows 9.

Posted on: 2009/9/4 0:18

Owen_Dyneto

Re: 5 or 9 Main Bearings?

Forum Ambassador

In 1952 only the Patrician (400) had the 9-main bearing engine.

Posted on: 2009/9/4 0:56

Ozstatman

Re: 5 or 9 Main Bearings?

Forum Ambassador

Check your engine serial number from Packard Literature and Manuals, see link below, to identify whether yours is a 5 or 9 main bearing.

https://www.packardinfo.com/xoops/html/downloads/PackardEngineSerials.pdf

Posted on: 2009/9/4 0:57

Mal
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Peter Packard

Re: 5 or 9 Main Bearings?

Home away from home

G'day all, I would suggest that you look at your crankcase under the exhaust, near the sump interface. You will find where the holes for the main bearing lubrication are sealed. You will find 5 grubscrews along the crankcase for a five main and nine grubscrews for a nine main bearing.
Hope you find nine grubscrews. Peter Toet

Posted on: 2009/9/4 1:05

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Eric Boyle

Re: 5 or 9 Main Bearings?

Home away from home

Quote:

You will find 5 grubscrews along the crankcase for a five main and nine grubscrews for a nine main bearing.
Hope you find nine grubscrews.

You will only find 8, the 9th one is hidden behind the oil pump.

Posted on: 2009/9/4 10:19

JWL

Re: 5 or 9 Main Bearings?

Home away from home

The engine number for your 1952 300 should be in the range of K400000 series. The 400 engine number are in the K6000000 series. I hope you find a K6xxxxx number.

Posted on: 2009/9/4 11:35

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