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| Mazda Engine >> TIMING CHAIN INSTALLATION ON 79-85 MAZDA 2.0L
Timing Chain Installation On
1979-85 Mazda 2.0L Engines
Correct installation of the timing chain on 1979-85 Mazda 2.0L
engines is critical to achieve the proper valve timing.
Rather than aligning the camshaft and crankshaft gears with marks
on the cylinder head or block, this engine uses marked plates on
the timing chain to set valve timing.
Start the timing process by rotating the crankshaft and camshaft
sprockets until the keyways are facing straight up (12 o'clock).
This should face the camshaft sprocket timing mark at 3 o'clock
and the crankshaft sprocket timing mark at approximately 5
o'clock looking at the front of the engine.
Locate the three marked links on the timing chain. Two links
should be positioned at the crankshaft sprocket so that the
timing mark is between the links (Figure 1). Position the chain
and camshaft sprocket so that the mark is in the middle of the
other marked link (Figure 2). There should be 20 unmarked plates
between the two positions.
Be careful, some timing chains do not use marked plates to
indicate the correct timing positions for the camshaft and
crankshaft. Use the old chain as a guide to make your own marks
on the new chain.
The AERA Technical Committee
August 1991 - TB 796
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