Water Pump Replacement: Cam Shaft Sprocket

Video Transcript

"In this clip we're going to talk about the proper service procedure to replace your engines timing belt and water pump. In this step we're going to talk about the proper service procedure for removing a cam shaft sprocket. And what we have here is a dual overhead cam engine. Remove these air conditioning lines and you can see these are the cam shaft sprockets, and they're over the cylinder head and there's two of them so that makes it dual overhead cam. Now we have to remove the cam shaft sprockets in order to remove the inner timing belt cover in order to change our water pump. Now what we have to do is break this knot loose. Now one of the things you're not going to want to do would just take a wrench and start running this cam shaft down. What you'll do is actually operate the cam and you'll run your valves into the top of the pistons. So what you need to do is hold this cam shaft still and then break the bolt loose. Now there are special tools and various kinds of equipment that will hold this sprocket for you. If you're a real lucky person and I'm not one of those you could leave the belt on it, and actually break it loose with an impact with the tension on the belt. Now the belt works about 50/50 percent of the time. Most of the time what'll happen is you'll put your wrench on it and it just revolve the engine around. So what I like to do and this will work every time is take another ratchet, what I'm going to do is slip that socket onto a bolt in the inner cover. Now from here we're going to take and rotate; you can see how the sprocket moves. What that'll do is drive the sprocket into that other socket like so. It'll jam up against here and hold that sprocket still so I can break the, the bolt loose. Alright, there is your cam shaft sprocket bolt. You can see it has some lock tight on it. You're going to want and take lock tight back on it when you install it. We're going to set this aside for later re-installation. Wiggle my locking socket out of the way and slip the sprocket off. You're going to need to pay attention depending on the engine that you're working on is you can see here this sprocket is labeled. It says 2.4 liter front and it's got some arrows that says up. Now as a cough cutting measure Chrysler uses the same sprocket however it uses it in a different direction for the 2 liter version of this motor. It says 2.0 engine front. As you can see the off set is different. A cam shaft actually sits farther inside on this one then on the other way. You're going to want to pay particular attention when you're reassembling it to make sure you have it put back on the other way. Now you can get them mixed up from this way to this way, they are the same size. They normally are indicated which one is exhaust which one is crank shaft. So yep just like I said make sure to pay attention and put them on exactly the same way they came off. You're going to go ahead and repeat all those procedures for removal of the second cam shaft sprocket."