* Distributor Type: The 1987 S10 2.8L V6 used a distributor-type ignition system. The timing is adjusted by rotating the distributor.
* Engine Temperature: The timing specification is usually different for a cold engine versus a warmed-up engine.
* Vacuum Advance: The distributor incorporates a vacuum advance mechanism. The timing will vary depending on engine load and vacuum.
* Method of Setting: You won't find a simple "X degrees BTDC" number. The procedure involves setting the timing with a timing light while the engine is running at idle. This then accounts for vacuum advance. This must be done with the appropriate vacuum connections attached.
To find the correct timing specification:
1. Consult a Repair Manual: The best source is a factory service manual for a 1987 Chevy S10 with the 2.8L V6 engine. These manuals provide detailed instructions and specifications, including diagrams. Haynes and Chilton manuals are also options but often less detailed than factory manuals.
2. Look for a Decal: There might be a sticker under the hood or on the radiator support that gives basic timing information. However, this is unlikely to give you the full procedure.
In short: You need a repair manual to properly set the ignition timing on your 1987 Chevy S10 2.8L V6. Simply searching for a degree number won't suffice because the adjustment is more nuanced and relies on a specific process.
