When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
the crankshaft drives two timing chains one for each overhead cam. seeing that your car is a 99 i doubt that it has enough miles on it for it to need a new timimg chain. they last many miles before they begin to loosen up.
Are you asking because you have a problem that you think is related to the timing chains or cam? If so, it'll probably help more if you give the symptoms.