Question about 1994 GMC Sierra
I don't have a diagram but here are written instructions.
I don't know how much you know about the subject so I will start at the beginning. First you have to get to it, you can pull the motor or leave it in the vehicle. Its a little harder with it in depending on the space you have in engine compartment. If your leaving the motor in, which I imagine you are, your going to have to take the front end of the vehicle apart. Remove the grill, bumper if need be, radiator, fan, water pump, harmonic balancer, you will need to buy a puller and a installer for the harmonic balancer. You can get a puller kit from harbor frieght tools for $10. You can buy the installer from Summit racing (web site) for around $30 or you can buy one that will do both the install and removal from summit for $70. Once you have removed your harmonic balancer you can remove your timing cover to expose your timing chain. Turn the motor using a socket wrench until the timing marks on the crank gear and cam gear line up. The marks are usually just white dots, you want the crank mark to be up towards the cam and the cam mark towards the crank, the marks will be up and down from each other. Once you have the marks lined up remove the bolts holding the timing chain to the cam and crank. Remove the timing chain as a whole unit with the cam and crank gear still on it. If the crank gear doesn't want to come loose use your puller on it. when you get it off just put your new gear on and line up the timing marks then put it back on as one unit. If you cant get the crank gear on all the way by hand buy a crank install tool (summit) they run about $24. While you have the thing apart it would be a good Idea to put a new timing chain on. Depending on your vehicle this would also be a good time to change your cam if need be. Its not that hard to do it just takes a while, take your time and don't force anything. If you need anymore help my email is email@example.com
Posted on Jul 19, 2009
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Posted on Jan 02, 2017
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