Ther are no timing marks of the dual cams, & just two dots on the main crank pullie 2 degrees way from each other. I am told that it needs a special tool. Is ther a way I can find the timing with the marks? I know how to bring the # 1 piston to TDC. how can I adjust the rest?
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Re: timing for a 96 mercury mystique 2.0 4cyl. L4
You are quite right, there are no timing marks on the camshaft pulleys. One of the marks on the crankshaft pulley, the one that is furthest counter-clockwise, lines up with a raised mark on the oil pan,at about 5 O-Clock as viewed from the front. The special tool to position the camshafts is a straight bar that aligns the slots on the rear of the camshafts. These are supposed to be aligned before the belt is removed. If the engine is turned without the belt installed, some of the valves can be damaged. Hope this helps.
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Cam timing mark is a hole in the cam wheel which when positioned vertical a dot or an arrow behind it can be viewed through the hole and aligned with it.
Crank mark is another dot at about 2 o'clock and a notch in the disc behind the toothed pulley.
If there is any difficulty locating the mark, usually removing the no1 spark plug will allow a rod to rest on the piston top while the crank is gently turned. When the rod indicates tdc the two marks should be approximately in line.
You can find the timing mark on the end of a crank shaft by looking for an indented dot which marks top dead center.
A flywheel is balanced and does not need a mark. However if the wheel you refer to is a cam gear (one or two gears depending on how many cam shafts your engine has) look for 2 dots with a tooth grove between the two dots. A matching drive gear will have a single dot aligned with a tooth on the drive gear. When put together the single tooth marked on the drive gear must fall into the grove marked the the 2 dots on the cam gears.
If you are just trying to time an engine, the belt drive pulley mounted to the crank shaft will have a single indented line. The line can get filled with dirt so you can't see it. Wipe it clean and fill with grove with something to highlight the groove, as with a white or yellow crayon or a dob of bright paint. Associated with the belt drive pulley, there should be a metal plate with line marks spaced on it, with 0 degrees (top dead center TDC) marked on it, When the engine is running, using a strobe light connected to your number 1 spark plug you will see where the timing mark on the belt drive pulley is compared to the metal plate with the timing marks.
looking from the front of the engine , the pulley mark on the LH cam pulley lines (12o'clock) up with the centre of the 2 notches and the RH lines up (12 o'clock) with the single notch. On the crank one mark will be lined up with a single notch at about the 1 o'clock position and another at the 3 o'clock position lined up with a series of dots. Ensure that you have the piston on TDC no1 first and align the crank marks first.
Number one piston all the way up. Your crank pully should line up "zero" or TDC with the line on the pulley.
The rotor should be pointing to the #1 spot on the distributor cap. (If it's off, it will be facing 180 degrees off, then turn the crank one revolution.) If this doesnt jive, your distributor may be off a tooth.
Also, ...are you sure the cam was positioned correctly? (With the crank pulley at the TDC mark, the dot on the lower gear straight up, and the cam gear mark straight up.)
One is on the crank shaft pully (for TDC). It is a line, scribed on the pully, that alligns to a pointer on the plastic timing belt cover. The second is on the cam shaft pully. It can be accessed by removing the rubber inspection plug on the timing belt cover. The third is on the auxillary shaft (oil pump) and is also accessed through an inspection plug on the timing belt cover.
On the cam and oil pump pullies, the diamond aligns to the diamond and the triangle aligns to the triangle (the pullies have both). These should be perfectly aligned when the crankshaft pully line is at 0 deg TDC. If you can't see the marks through the inspection port while the crank is at 0 TDC, you are 180 degrees out - turn the crank one more time.
as long as the the hole in the cam sproket is facing straight up and the crank on 0 youre timing should be good there are marks on the back plate for the cam sprocket its like a little indent line the hole up with that and the crank has a dot on the oil pump and a small v on the crank sprocket youre key way should be facing up on the crankshaft
there are marks on the block near each pully that have a mark. usually block mark is like a triangle, pully mark is a dot. cam pully and crank pully should be only ones to line up. a repair manual will show you the what & where in your vehicle. good luck.
On the CAM it is a DOT and should be Pointed Straight UP. And On tha CRANK its a LINE that should also be pointed STRAIGHT UP. NOTE ::: There are Marks BOTH on the HEAD for the CAM And BLOCK for the CRANK
if you mean the timing chain then on your crank gear and your cam gear there will be a mark on each sometimes they look like a dot the dots need to look like this for perfect timing ( . . ) this will be there closest position. Your crank turns once all the way around (360 degree) and your cam gear will do two complete revolutions to the one of the crank gear. so when you set your marks as above when you turn the crank one half turn the mark on the crank gear will be at the bottom and at the same time your cam gear will have made one complete revolution, so when you turn the crank another half turn your cam would have turned again a complete revolution and the two marks should be at their closet point again.