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Re: timing marks for 91 volvo
The balance shaft pulley should be sitting at 4 o'clock, the crank pulley should be setting at 12 o'clock, and the cam pulley should be set even with the edge of the cylinder head at about 11 o'clock. You may have to set the distributor forward or back a little t get it running right.
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Ok i got a 91 Legend. The repair manual says to lock the two cams in TDC. So find the blue driver side and red passenger side timing marks on the sprockets facing towards front. Thers a notch yellow lineat about 11 o'clock on the driver side and 1 o'clock on the passenger. line them up and find something to keep them in place. If they move you could have a valve bent by a cylinder so dont force it to much. When moving the sprockets you need to have the crank/oil pump gasket/harmonic balance r pointing up. theres a small arrow on the engine if you have your timing covers off that you line up with a little dimple tiny mak( you might have to remove the crank pully and behind it is the timing pully its half the size of the sprokets and rotates twice for every sproket thet turn. so make sure you keep thing fastened so you can save a lil time. line up the marks on the crank. not totaly sure but i think the front passenger side cylinder is the #1. Just start on the crank then by the tensioner, then driver or left cam, then whater pump then finally the passenger side cam. this one tends to move then when you try and TDC it swing with spring lifter or valve action. Move the passenger cam one tooth advanced clock wise. Clock wise is how a legend engine shoul be turned. If you dont advance the passenger cam a tooth the timing will most likly be one tooth off. This a little trick to put on perfect timing. After you turne the crak six times making sure on every turn that TDC marks line up, if not start over. when all is good you turn the crank nine teeth clock wise. every thing like the timing cover should be on now. locate the marks or three noches they should line up to a blue line on the crank pully. Oh i forget you can take the spark plugs out to help turn the the engine. oh you could also use an air compressor in the spark plugs to lift a valve or something if it falls on a piston. You will need 19mm socket a ether home made tool or the holder tool( ebay $25) or ( home depo 11/2 galvined pipe with hexagon shape $12.50). Alsow a 10mm, 5/16 or actually 8mm and 12mm. Thats all of the top of my head. Well i just did it few days ago. Good luck and if you have the time and the tools of confidence save your self a few weeks pay but if something aint right stop recheck or you might need to losen the rocker arms in the engine their 8mm and six up in there and keep the screews on lose lift entire rocker assembly. two turns at a time on every bolt till there all lose fift as unit be care full or it can fall a part in few dozen pieces. This may only need to be done if you have something hitting and the air wont put it in place. Peace
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.
remove drivers wheel then plastic wheel arch then put jack under engine and remove the engine mount then take off fan belt and timing belt cover mark your two top cam pullys and the crank pully then remove your belt and tensioner put new belt and tensioner on making sure all your marks line up then put on the crank pully and turn engine over twice by hand using a ratchett on the crank pully bolt if it turns over and your marks still line up put it all back together and start the car
you have all 7 marks lined up? there are the top two pullys that need to be lined with the top marks on the rear timing covers, and then there are two marks on the bottom of those pullys that need to be lined with the marks on the two bottom pullys, as well as the two side marks on the bottom pullys that need lined on the belt, and then the mark on the crak pully that needs lined up with the mark on the oil pump?
The timing marks are as follows
1. there is a "V" on the cylinder head cover.
2. Timing mark on camshaft timing belt gear
3. "Arrow mark" oil pump case
4. Punch mark on crankshaft gear.
DON'T MESS UP! THIS IS AN INTERFERENCE FIT ENGINE! IT WILL BEND VALVES!