Timing Cover

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The Timing Cover is the aluminum part on the front of the engine that covers the Timing Chain. It also has a timing mark on the cover and houses the crankshaft pulley seal.

Overview

The Timing Cover bolts to the front of the engine block and covers the Timing Chain. The Water Pump bolts to the timing cover.

Timing Cover with water pump bolted on

Early 1200 cover - single timing mark

Late 1200 cover - multiple timing marks

Water pump bolts to the timing cover. And the cover bolts to the front of the block, and passes water through two ports (the square hole, and the round hole).

Matched Set

Depending on the country, 1971 or 1972 saw newer timing covers which differ from earlier covers. Each one matches a certain pulley.

Japan got the Timing Cover change in June 1970. North America: all A-series engines from 1972.

Early Set
Multiple-mark Crankshaft Pulley
Single-mark Timing Cover

Late Set
Single-mark Crankshaft Pulley
Multiple-mark Timing Cover

Interchange

The same covers are used by A10, A12, A12A, A13, A14 and A15, except for the first type:

1. Original Datsun 1000 timing cover, for single-row timing chain 
   13035-18000 ASSY-COVER TIMING CHAIN 
2. to June 1970, with single timing mark (pulley has multiple marks)
   13035-18001 ASSY-COVER TIMING CHAIN 
   [updated to fit Double timing chain & pressure tensioner]
3. from June 1970, with multiple timing marks (pulley has single mark)
   13035-H1000 (or from second source: 13035-H1010) 
   [Fits all A10 blocks]

Interchange is same for same. The last two will interchange if the complete set (matching pulley & cover) is used.

Gasket

* Nissan 13044-18001 GASKET-TIMING CHAIN COVER
  Fits all A-series timing covers A10/A12/A13/A14/A15
* NOTE: Does not include oil pan gasket, water pump gasket or pulley seal

A timing cover gasket set typically includes the front Crankshaft Pulley seal and Water pump seal. NOTE: The oil pan needs to be partially dropped to change the timing cover, requiring a new oil pan gasket.

Felpro include part of the oil pan gasket

RockAuto.com

* CORTECO 14308
* FEL-PRO TCS24531 $6.74
* BECK/ARNLEY 0380071
* VICTOR REINZ JV917

Seal

The Timing Cover gasket set includes a front crank seal.

Also see: Crankshaft Seal

Corrosion

Click each photo to read about corrosion of the timing cover.

Tach Drive

Race engines sometimes use a mechanical tachometer drive off the camshaft, with the Timing Cover modified to suit.

See main article: Tach Drive

Customized

Tachometer drive

Access cover for adjustable timing gear

Part Numbers

Nissan 13035-H1000 $102.77 USD 
Bprojects E-G-0190 ¥10,800 yen