I can confirm.
The series starts in Issue 4240 with the crankshaft and finishes up in Issue 4248 with the carburettor.
Six parts, even numbered issues only.
Returning to the topic of a wooden engine, have you seen woodgears.ca ?
Have a look at http://woodgears.ca/air_engine/index.html
The guy who runs the site has a number of wooden mechanisms and contraptions.
His marble machines are worth a look too.