Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

4A Checking Engine Timing


1. Connect timing device to engine, then have assistant start engine while you look for timing marks.
2. Ensure timing is 0---16°BTDC, then proceed to check valve timing and check compression.
3. If timing is not 0---16°BTDC, proceed to Step B.