Not a for sure thing, but it's very possible.
The opening and closing of the valves needs to be timed correctly, otherwise they could be open when the piston reached the top and damage could result.
Timing marks are used to set the ignition, so that the spark plugs spark when the pistons are at the right position and moving in the right direction. The timing marks for your 1995 VW can be found on the front of the main pulley. The timing marks will be scattered around the outside of the main pulley.
It is not like a belt and pulley. A timing belt is a belt and it fits on a pulley.
yes u do have to take off crank pulley and it is a chain inside you should not attempt this with out a manual because you will need to know how to line the timing marks up if you do not get this right you will end up with valves colliding with pistons that gets very expensive
When the crank pulley marks are aligned with the dots of the waterpump That is 90 degrees BTDC. So the asnwer to your question is yes. The pistons are 1/2 down the bore
The timing belt is what keeps the valves from moving in synch with the pistons. If the timing belt snaps or cogs over the pistons are likely to collide with the valves smashing them both.
If a new timing belt was installed but the valve timing does not correspond with the pistons ie: the valves opening as the pistons reaching top dead centre ,,then it will be jamming.. bending valves and possibly damaging pistons.. when fitting a new timing belt or chain you have to be very careful of cam/valve position in respect of the pistons
absolutely. If that is what is squealing and it ceases the timing belt could be damaged and in some engines cause major damage. Non clearence engines can smash vales and pistons and even crack heads and pistons. Go to http://www.gates.com/part_locator/index.cfm?location_id=3598&go=Interference to find out more about timing belts. There is also a tension pulley on many serpentine drive belt assembly. This belt is usually very long and goes the engine pulley, alternator, PS pump, AC pump. The idle pulley applies pressure to the back side of the belt, the flat and opposite side that would fit into the slots of accessory being driven.
The timing marks, on your 1992 Toyota, are located on the main engine pulley. The timing marks can be found around the perimeter of the pulley.
The 1999 Toyota Tercel timing marks can be found on the main pulley. The timing marks will be scattered around the outside of the main pulley.
The 1986 Mercedes-Benz timing marks can be found on the main pulley. The timing marks will be scattered around the outside of the pulley.
The ignition timing marks can be found on the main pulley. The timing marks will be scattered on the outside edge of the pulley.
The timing marks on your 2001 Volvo S40 can be found on the outside of the main pulley. The timing marks will be scattered around the edge of the pulley.