Pontiac & Tempest Carburetors

With choke thermostatic coil and cover removed and throttle valves opened so that fast idle screw does not contact fast idle cam, close choke valve fully by pressing on piston lever in choke housing. Top of choke piston should be Flush to 1/64" Below lip of piston cylinder. Adjust by bending choke connector rod.

Fig 1: CHOKE PISTON LINKAGE (TYPICAL) (WITH INTEGRAL AUTOMATIC CHOKE)

Courtesy of GENERAL MOTORS COMPANY

Choke Piston Linkage Setting

Car & Carb.

Choke Valve Clearance

Buick 4053S, 4054S, 4060S.

.109"

4055S

.095"

4056S

.082"

4059S

.102"

4061S

.088"

4179S

.135"

4180S

.128"

4181S

.109"

4331S

.085"

4332S

.095"

4344S

.075"

Chrysler 4140S, 4325S, 4343S

1/8"

4402S

5/64"

Lincoln 4147S, 48S; 4204S, 5S

⁽¹⁾.09Q-.110"

4360S, 61S. 62S, 63S

3/32"

⁽¹⁾	Supersedes previous setting of.110-.120" for improved fuel economy. See "Changes, Cautions, Corrections .