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Timing Covers


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1968 and earlier timing covers had 8 bolt water pumps.
1969 and newer timing covers had 11 bolt water pumps.

Timing covers all will bolt up, but you need to use the matching dampers and
water pumps for '67 and '68.
'69 was different because there was a short 4-inch pump casting for Firebirds only.
After '69, water pumps never changed again.

The '64-65, 66, 67, & 68 timing cover is approximately 2 11/16" thick and with
water pump mounted, there is a distance of aprox 6 1/2" from block mating surface to
water pump pulley mating flange.

The '69 and newer timing cover is approximately 2" thick and with water pump mounted,
distance is approximately 7" from block mating surface to water pump pulley mating flange.


Casting number:
YEAR(S) PART NUMBER CAST NUMBER ENGINE NOTES:
1937-48 522932 ALL EXCEPT 6 CYL. 1939-40
1949-54 522933 ALL EXCEPT P.G.
1953 522938 ALL P.G.
1955-62 540069 ALL V-8
1957 518033 518034 V-8
1962 541503? 541504 V-8
1963 548689 548690 V-8
1960 536191? 536192 ALL V-8
1961-63 540071 TEMPEST 4 CYL. CAST IRON, FOR PUMPS WITH NO DIVIDER
1961-62 1389457 TEMPEST V-8 (215 C/I)
1963 9772526 ALL TEMPEST 4 CYL. FOR PUMPS WITH DIVIDER & INTERNAL HOUSING
1963 540069 ALL V-8 CAST IRON, FOR PUMPS WITH NO DIVIDER
1964-65 3876169 3876170 TEMPEST 6 CYL.
1964-65 9773370 9773371 All V8
1966-67 9783129 9793130 ALL V-8 FOR PUMPS WITH DIVIDER & INTERNAL HOUSING
1968 9790347 V-8
1966-68 9784280 FIREBIRD & TEMPEST 6 CYL.
1969 9797609 FIREBIRD & TEMPEST 6 CYL.
1969-70 9796346 9796347 All V8
1969 9797581 9797582? ALL V-8
1970 3947042 TEMPEST 6 CYL (CHEVY)
1970 478126 ALL V-8
1971 482893 482883 ALL V-8
1976 (Late)- 1979 526984 526985 400 For the abbreviated dampener. Separate timing tab.
1976 - 1979 527291 527292 400 For the normal dampener





1960 Timing cover ^




1968 Timing cover
Close-up of casting number

1969 Timing cover
Close-up of tab and casting number
1970 - 1976 cover

1970-76 close-up
No tab timing cover

Separate Timing Tab


'67 & earlier Pontiac timing covers: 


The '66 tripower engine used same timing coiver as std '66 engine. The main reason one usually
has to worry about a timing cover when installing on a '66 tripower engine, is the timing covers
up through at least early '74, had a recess cast into the top back to clear a tripower water
neck.

Pulleys For 1967 And Later Pontiac Motors

This information was taken from the February 2003 edition of Pontiac Enthusiast Magazine.

 
Part Number Type Diameter Grooves Usage
9786819 WP No A/C 8" 2 1967 (w/P.S., No A/C, No Smog) or  (w/P.S., No A/C, w/Smog)

9788886 WP A/C 5 11/16" 2 1967 (w/A/C, No Smog, w/P.S.) or
(w/A/C, w/Smog, No P.S.) or
(w/A/C, w/Smog, w/P.S.)

9786900

 P.S. 5 7/8" 1 1967-70 (w/Smog, No A/C) or
(No Smog, No A/C)
9786901 P.S. 7 3/32" 1 1967-70 (w/A/C)
9786909 WP A/C 7 1/8" 2 1967 (w/A/C, No Smog, No P.S.) or
(w/A/C, No Smog, w/P.S.)
5445595 WP 8" 1 1967 (no A/C, No P.S., No Smog)
9786714 BAL 7 5/16" 2 1967 (No A/C all)
9786908 BAL 8" 3 1967 (w/A/C all)

 

Key: WP - Water Pump    P.S. - Power Steering    BAL - Harmonic Balancer    Smog - Air Pump













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