Look for a certified mechanic who has experience working with your car’s make and model.Īlso, keep in mind, there are many different areas a technician can specialize in. You don’t want just anyone popping the hood and poking around. The new car smell may be long gone, but that doesn’t mean your car doesn’t deserve the best – even if it’s seen better days. But no damage was done.How to find a mobile mechanic for a Timing Belt replacement? That tells you the job has to be rechecked. If you were to rotate the crankshaft by hand first, you'll feel it come to a sudden, solid stop when the pistons hit the valves. If you use the starter to try to start the engine in that state, it's strong enough to bend the valves, then a head gasket and valve job are required. Improper installation procedures also can lead to the belt being off by three or more teeth. My reason for sharing this is many people try to cut corners and don't replace the hydraulic and spring-loaded belt tensioners when replacing the timing belt. The valves will be bent, requiring a lot more work. At three or more teeth off, the open valves will hit the tops of the pistons when they reach TDC.
At two teeth off, the computer will shut the engine down to protect the valves. If the timing belt is off by just one tooth, the Engine Computer will see that, turn on the Check Engine light, and set the diagnostic fault code, "cam and crank sync". I can share that some of the Neon engines are interference engines. When you're turning it the right way, all of the slack in the chain or belt ends up on the side with the tensioning device.įor future reference, while the 318 is not an "interference" engine, it's still good practice to rotate the crankshaft twice by hand, not with the starter motor. If you're ever confused on another engine, just look at where the crank sprocket is pulling the timing chain tight, (right side in this case). That's clockwise as you're sitting in front and looking at the front of the engine. Rotate the crankshaft by hand with a socket and ratchet two times, then recheck the timing marks. Regardless, you're still looking for the same thing. 318s never had the fiber tensioner on the side of the chain. The good news here is you don't have a lot of new technology to make this a confusing job. That's when things go wrong and you have to take things apart again. This will be with no water pump, alternator, power steering pump, and given enough time, oil spraying around.Īfter you do enough of these, you become confident, and even complacent, and tend to stop paying such close attention to detail.
If you can run the engine for even a few seconds with the timing cover off, you'll have confidence in your work as you're putting everything together. I like to see my engines run before I button everything up. The slack will allow you to do that by moving back to the left side. You'll need to rotate that sprocket back counterclockwise one tooth to slide it back onto the camshaft. Now slide the two sprockets forward just enough until you can drop the cam sprocket out of the chain, then rotate that sprocket clockwise one tooth on the chain. That will put the camshaft in proper time, and it will put the chain's slack on the right side. You'll need to retract and pin the tensioner again, then turn the cam sprocket clockwise one tooth. Most are confused as to why they had to do that. Some people do recognize the camshaft has to be rotated back a tooth.
2000 DODGE DAKOTA TIMING CHAIN REPLACEMENT INSTALL
Many people rotate the cam sprocket until it slides onto that shaft and keyway, then they use that orientation to install the chain. The crankshaft didn't move, but the camshaft most likely did. When it comes to sticking the two sprockets on, both have to line up with their keys. In almost all engines, when the belt or chain is removed, the pressure of the valve springs on open valves will push on the camshaft lobes and turn the camshaft, often without you noticing. The second cause refers to your comment about not turning the camshaft. This applies to all timing chains and belts that use an adjustable tensioner. That will put the cam sprocket one tooth late, as it appears in your photo. If that isn't done, and there's some slack on the right side, the camshaft is going to rotate counter-clockwise when the tensioner is released and takes up the slack. They should be lined up when all the slack in the chain is on the left.
Rotate the crankshaft two revolutions in the normal direction, (clockwise as viewed from in front), then check the timing marks. What they should have explained better was to set the chain tight on the right side, as viewed from the drawing, and with slack on the left side. I posted the instructions, mostly to show how unclear they are. The first has to do with the spring-loaded tensioner. It's a little hard to see being at an angle, but it looks like the cam sprocket is off by one tooth.
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