Where are the timing marks?
A timing mark is an indicator used for setting the timing of the ignition system of an engine, typically found on the crankshaft pulley (as pictured) or the flywheel, being the largest radius rotating at crankshaft speed and therefore the place where marks at one degree intervals will be farthest apart.
What do timing marks look like?
Most engines will have two or three marks on the inner crankshaft pulley to be lined up with the “arrow” mark on the engine block. Similar marks will usually be found on at least one of the camshaft pulleys. The top dead center (TDC) mark can be the center, left, or right mark, depending on the engine. …
How do you mark a timing belt?
Get your marks lined up right the first time. After you remove the top section of the timing belt cover, you should see a timing mark on the camshaft sprocket — this mark usually lines up with the edge of the cylinder head or valve cover.
Why is it important to ensure all timing marks line up?
Those marks have to line up with each other when the timing belt is installed and inspected after the timing belt tensioner has been adjusted. The two gears control the position of the camshafts. The timing belt, if properly installed, synchronizes the position of the camshafts with the position of the crankshaft.
What happens if timing marks don’t line up?
Install lower timing cover and harmonic balancer. Rotate the engine a few times then align the crank pulley to exactly zero. Check cams, you may have to rotate the crank once to bring the marks to the top. At this point the belt marks will not line up ignore this.
What happens if your timing is off?
If the timing is off, damage can occur. In some engines, called “interference engines,” the consequences can be especially bad. You could end up having to have your engine rebuilt, or even replaced. If your cam timing is off, chances are you’ll know because your car will not be running well, if it’s running at all.
How long does it take to replace a timing chain?
Oftentimes, it’s going to take a mechanic between 4 and 6 hours to complete a timing chain replacement job from start to finish.