Line-drawing diagram of a timing chain, gears and labels for fue…

Mech. fuel pump eccentric

To check the timing chain stretch without much disassembly, remove the distributor cap, rotate the engine forward using a socket on the crank bolt (inside the harmonic balancer pulley) and a breaker bar until the timing mark aligns with 0 degrees (TDC). Then carefully rotate it backward JUST until the rotor moves, and read the degrees from the scale.

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Owner caption April 2006 · Photo 1228 of 6546