1991 toyota p/u timings not right. If crack is at

The marking on the casing is factory rong, check your piston on TDC & adjust your mark for the teeth

Does it pop and backfire? Are you sure the distributor was also correctly set? If any of that is true, you may be 180° out of time.

Hi,if I was you I would put the distributor in the only way it will fit.
as long as you have got the valve and crank timing gear setup correctly you cant do eny damage.if you have set the valve and crank so when you turn the crank twice from tdc mark and the marks line up then you can sort out the ignition timing out after.
hope this was some help

With the engine crankshaft at zero TDC the cam gear mark next to where it says "E" should be lined up at the top with the mark on the front cam bearing housing.

The cams make 2 complete rotations for every 1 rotation of the crank so you could be out of time by 180 degrees.With the valve cover off turn the engine over by hand. As #1 piston comes up on TDC the intake valves should be open and starting to close. As you go past TDC the exhaust valves should start to open. If this is not what is happening in this order then your timing is off. Your engine should be at TDC when the timing marks are lined up with the marker on the engine. Hope this helps.

8 degrees before tdc

The word up,is straight up,with the grooves on the cam gear,on left,and right side of cam gear lining up with the top edge of the timing cover (lower cover),,,The pointer on the housing for the crank is at 12 o clock,should align with tdc mark(dimple) and keyway.

there will be two highlighted or dotted chain links for the camshaft and one for the crankshaft gear, position cam dot/TDC indicator in the 12-O clock position, the two dotted links should be on ether side of cam dot, turn crank dot to the 6-O clock position and line up highlighted link with dot on crank gear, if timing cover is on, then make sure cylinder 1 is at TDC when the two links are at 12-O clock.

You will need 2 5/16 drill bits. There is a 5/16 hole in each cam gear. With the crankshaft 1/8 turn off TDC, turn the cam gears so the hole is down. Insert the drill bit into the hole and move the gear slow until the bits slides into a hole in the rear timing cover. Do this to both cam pulleys. When you have both bits installed, this will lock the cams. Don't turn the cams with the crank at TDC, It will bend valves. Once you have the cams locked, turn the crank 1/8 of a turn back to TDC. Don't go the other way. The TDC mark on the crank should be a dot on the gear and a arrow on the rear timing cover. Then after everything is lined up, Install the chain,guides and tensioner. After everything is installed, Turn the crank two revolutions, and line the crank back up to TDC. If the timing is right, you should be able to insert the drill bits in each cam gear. Hope this helps.

there will be two highlighted or dotted chain links for the camshaft and one for the crankshaft gear, position cam dot/TDC indicator in the 12-O clock position, the two dotted links should be on ether side of cam dot, turn crank dot to the 6-O clock position and line up highlighted link with dot on crank gear, if timing cover is on, then make sure cylinder 1 is at TDC when the two links are at 12-O clock.