Hand holding a chain guide against a timing cover with mismatche…

Close-up of a fingertip holding a curved sheet-metal chain guide against an aluminum timing cover face, showing two elongated slotted mounting holes that do not line up with the guide's tab. A roller timing chain runs along the right edge past a toothed cam sprocket, with handwritten marks reading "RED" and "AGE" scratched into the aluminum.

AI caption July 2009 · Photo 280 of 455