There's a lot I don't yet understand about this. Wrong timing can be disasterous in some scenarios - such as a BMW interfence six being cranked and run just enough off timing to still run and bang valves as well. But there's a lot different in that scenario. I swapped in about 5 or 6 timing belts in my two E30 rigs, so that was something big in my thinking.

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Te futueo et caballum tuum

1986 300SDL, 362K
1984 300D, 138K