Portable Battery Jump Starter

In the past changing a timing chain or timing belt only required basic tools to get the job done. The camshaft and crankshaft sprockets only went on one way due to the design that used a key-way which only allowed the pulley to go on one way. Alignment marks for the cam and crank were aligned per directions from the service manual. Now many engines have no key-way and the pulleys are pressed on. Since the key-way is not used in increasing number of vehicles, specialty automotive tools are required to properly Align the cam and crank.

Looking for the Marks.  Many auto mechanics, when changing a timing chain in the past could just look for the timing marks and not even have to look up the timing mark diagram in the service manual (me included). It was pretty simple, bring the number one cylinder to top dead center and look for the obvious timing marks. Most of the time there was only the crank and only one camshaft to deal with and the pulleys went on one way. Times are changing.     Read more...