what engine do you have in your impala?
4 degrees btc-before top dead center with the vacuum spark line disconnected.the timing mark location is on the harmonic balancer. this is for a 327 engine
it has a timing chain
All Chevrolet Impala's have a chanin that requires no maintenance or replacement under normal conditions.
The 3.4 liter V6 engine in a 2001 Chevrolet Impala has a timing CHAIN
8 degrees BTDC-- Before top dead center.
8 degrees before top dead center
8 degrees Before top dead center.
Every 10,000 miles
0 before top dead center.
6 degrees BTDC / Before top dead center
8 degrees before top dead center.
4 degrees before top dead center / BTDC