1986 Chevrolet Hi-Cube 6.2 J, 475/M40FACTORY OEM SERVICE PROCEDURE

Ignition System - HEI-Est (CALIF): Specifications

DISTRIBUTOR - AUTOMATIC ADVANCE SPECIFICATIONS(1)(5)

Part No. Degrees RPM Degrees RPM Degrees RPM
1103376 0-3 700 6-8 1400 9-11 2100
1103420 0-3 1000 N/A N/A 11-13 2000
1103436 0-4 650 7-9 1200 10-12 2300
1103465
(2)
0-2 700 3-5 1000 9-11 2100
1103572
(2)
0-2 800 5-7 1600 8-10 2000
1103573
(3)
N/A N/A N/A N/A N/A N/A
1103625
(3)
N/A N/A N/A N/A N/A N/A
1103631
(4)
0-2 800 15-7 1600 8-10 2000
1103634
(3)
N/A N/A N/A N/A N/A N/A
1103636 0-2 700 3-5 1000 9-11 2100
1103641
(4)
0-2 700 3-5 1000 9-11 2100
1103644
(3)
N/A N/A N/A N/A N/A N/A
1103655
(3)
N/A N/A N/A N/A N/A N/A
(1) All distributors rotate clockwise, as viewed from end of rotor

(2) Used with E.S.S. system.

(3) HEI-EST distributor does not use vacuum or centrifugal advance mechanisms.

(4) Used with E.S.C. system.

(5) For distributor RPM and Degrees multiply specifications by 2.
DISTRIBUTOR - VACUUM ADVANCE SPECIFICATIONS(1)(5)

Part No. Degrees Inch High Degrees Inch High
1103376 0 6-10 5 12-13
1103420 0 9-11 5 12-14
1103436 0 2-4 10 6-9
1103465
(2)
0 2-4 10 6-9
1103572
(2)
0 3-6 5 7-9
1103573
(3)
N/A N/A N/A N/A
1103625
(3)
N/A N/A N/A N/A
1103631
(4)
0 2-4 8 5-7
1103634
(3)
N/A N/A N/A N/A
1103636 0 7-10 5 12-13
1103641
(4)
0 2-4 8 5-7
1103644
(3)
N/A N/A N/A N/A
1103655
(3)
N/A N/A N/A N/A
(1) All distributors rotate clockwise, as viewed from end of rotor.

(2) Used with E.S.S. system.

(3) HEI-EST distributor does not use vacuum or centrifugal advance mechanisms.

(4) Used with E.S.C. system.

(5) For distributor RPM and Degrees multiply specifications by 2.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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