… courroie crantée
Finally! The answer to the question I posed in November, 2004 – What’s the French for Timing Belt?
Thank you Craig McGinty. and This French Life. He posted about FreeLang, a site offering free dictionaries to download. There are 26 specialist English/French dictionaries, including an Anglais mechanique automobile which is why I finally know that timing belt is courroie crantée in French.