Packard Forum Index » General

Topic: Packard pacific engine

Bottom

Previous Topic

Next Topic Register To Post

nivek123

Packard pacific engine

Just can't stay away

I brought my Packard pacific engine to rebuild it and found that it is 60 over on the Piston .How far over can I bore for available Pistons for sale
It is the 1954 Packard pacific 356 engine ,200 HP.
Also with the overbore will I get more horsepower?

Posted on: 2016/8/25 20:45

fredkanter

Re: Packard pacific engine

Home away from home

The engine is a 359, not a 356. 356 is a 40-50 Custom 8.

I wouldn't bore more than .060, that's the limit for most engines. There are no pistons made larger than .060. You will get more horsepower perhaps a fraction of 1 horsepower, surely nothing you could notice or detect.

Posted on: 2016/8/25 21:09

BDeB

Re: Packard pacific engine

Home away from home

Are you sure that it is .060" over?

Standard bore for the 359 engine in 1954 is 3-9/16" which is .0625" more than the 3-1/2' bore used for the 288 and 327 engines from 1948 to 1954

Posted on: 2016/8/25 22:14

1949 Custom 8

nivek123

Re: Packard pacific engine

Just can't stay away

well that's what happens when you buy on E bay,now I have to find a new block.

Posted on: 2016/8/26 10:05

HH56

Re: Packard pacific engine

Forum Ambassador

If there is any doubt if a 288/327 block or 359 block the motor number on the pad above the starter position will start M6xxxxx for the 359. That engine was rated at 212 hp when new.

Posted on: 2016/8/26 10:14

Howard

Ernie Vitucci

Re: Packard pacific engine

Home away from home

Good morning Nivek...Many classic automobile engines have been saved by new cylinder sleeves inserted into the bore. they will bring the bore back to the original standard size.

I would imagine that any good engine builder has had to make this repair many times. Ernie, Caretaker for 'Miss Prudence' a 1949 288 Deluxe.

Posted on: 2016/8/26 10:17

Caretaker of the 1949-288 Deluxe Touring Sedan
'Miss Prudence' and the 1931 Model A Ford Tudor 'Miss Princess'

BigKev

Re: Packard pacific engine

Webmaster

Unless some modifications were made, I highly doubt it has a 356 in there. I don't believe that block is drilled for the motor mounts that the 51-54 motor/chassis use. Like other said, it is probably a 359. That a look at the motor number, that will put the issue to rest.

As others said, the 359 has a bigger bore than the 288/327 motor.

Posted on: 2016/8/26 12:16

-BigKev

1954 Packard Clipper Deluxe Touring Sedan -> Registry | Project Blog

1937 Packard 115-C Convertible Coupe -> Registry | Project Blog

fredkanter

Re: Packard pacific engine

Home away from home

On second thought I believe the owner thinks it was originally a 3.500 bore and finding 3.560+ thinks it's overbored by .060.

The original bore on an 359 engine is 3 9/16" = 3.0625

Posted on: 2016/8/26 14:07