Mitsubishi S4S-D — Checking Top Dead Center of No.1 Piston on Compression Stroke
Testing & diagnosis · Crankshaft / timing
For the Mitsubishi S4S-D, from the Mitsubishi service manual.
Applies to: Mitsubishi S4S-D, Mitsubishi S4S engine
Procedure
- Engage the turning socket with the crankshaft pulley nut and turn in the normal direction.
- Stop when the \"0\" mark on the crankshaft pulley aligns with the pointer on the timing gear case.
- Move the rocker arms of inlet and exhaust valves of No.1 cylinder to check pushrods do not push them up.
- If pushrods push up rocker arms, rotate crankshaft another turn.
Tools required
- Turning socket 58309-73100 Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Mitsubishi service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.