56 Corvette balancer

[Edward M.]

It appears that there are two different types of harmonic balancers for 56 Chevy engines. One type has the pulley riveted to it, and the other type has a bolt on pulley.

What is the correct application for the two different types of balancers?

[Joe L.]

Re: 56 Corvette balancer

It appears that there are two different types of harmonic balancers for 56 Chevy engines. One type has the pulley riveted to it, and the other type has a bolt on pulley.

What is the correct application for the two different types of balancers?

Ed-----


From what I can tell, there were FOUR different balancers used for 1956 Chevrolet engines:

1956 265 cid except 2X4 or A/C----GM #3711319--riveted pulley+balancer;

1956 265 cid with A/C----GM #3719629---riveted 2 groove pulley+balancer;

1956 265 cid with 2X4---GM #3712763--riveted pulley+balancer; also used for Corvette;

1956 265 cid with 1 X 4 Corvette-only---GM #3717206---I don't know the configuration of this unit

[Edward M.]

Re: 56 Corvette balancer

Ed-----


From what I can tell, there were FOUR different balancers used for 1956 Chevrolet engines:

1956 265 cid except 2X4 or A/C----GM #3711319--riveted pulley+balancer;

1956 265 cid with A/C----GM #3719629---riveted 2 groove pulley+balancer;

1956 265 cid with 2X4---GM #3712763--riveted pulley+balancer; also used for Corvette;

1956 265 cid with 1 X 4 Corvette-only---GM #3717206---I don't know the configuration of this unit

Thanks Joe. Now, any idea how to tell the difference between 3711319 and 3712763? Deep groove pulley perhaps?

[Mike M.]

Re: 56 Corvette balancer

i'm guess the 319 is a shallow groove and the other a deep groove. mike

[Joe L.]

Re: 56 Corvette balancer

Thanks Joe. Now, any idea how to tell the difference between 3711319 and 3712763? Deep groove pulley perhaps?

Ed-----


Technically, it's the width of the groove. However, a wider groove also makes for a deeper groove. The GM #3711319 has a pulley with 3/8" wide groove; the GM #3712763 has a 1/2" wide groove.

[Roy B.]

Re: 56 Corvette balancer

It appears that there are two different types of harmonic balancers for 56 Chevy engines. One type has the pulley riveted to it, and the other type has a bolt on pulley.

What is the correct application for the two different types of balancers?

56 is the same as a 55 riveted pulley and not a deep belt design