Sable V6-3.0L VIN U (1999)
Timing Chain: Testing and Inspection
1. Remove LH valve cover.
2. Loosen No. 5 exhaust rocker arm and rotate to one side.
3. Install Dial Indicator with Bracketry 100-002 (TOOL-4201-Q) or equivalent on the end of push rod.
4. Turn crankshaft clockwise until No. 1 piston is at top dead center (TDC). The damper timing mark should point to TDC on the timing degree
indicator.
This will also take up slack on RH side of chain.
5. Zero the dial indicator.
6. Slowly turn crankshaft counterclockwise until the slightest movement is seen on dial indicator. Stop and observe damper timing mark for number
of degrees of travel from TDC.
7. If reading on timing degree indicator exceeds 6 degrees, replace timing chain, crankshaft sprocket and camshaft sprocket.
