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You need to find your#1 CYLINDER and make sure the piston is in the top of the cylinder then ma k e sure your crankshaft is lined up with the TDC mark the marks will then line up
Basically, #1 piston should be all the way up, with the intake valve past opening and now closed and the exhaust valve just about to start opening. Buy a cheap shop manual to insure you get this correct or you will be very sorry.
If the timing is off, there will be no spark. Remove number 1 plug. put a straw or other soft object on top of piston in plug hole. turn engine by hand until its at top dead center on timing mark. when its on number 1 the straw will be all the way up and just before it goes down. that is top dead center. Good Day! its a possibility that the timing belt is off a notch. try above to see.
TDC is an acronym for Top Dead Center. It is when the piston has reached the very top of its travel and there is nowhere for the piston to go but down. If you align the timing marks on the engine, the piston will be at TDC with the valves on #1 closed.
To position your crankshaft and cam to the correct position, it should be done BEFORE removing the belt if possible. If the belt has already been removed and/or the belt was broken, the same principles apply, but you will have to go about it completely different.
Turn the engine clockwise to align the "O" on the crankshaft pulley with the "O" on the outer timing belt cover.
Remove the plug in the outer timing belt cover and look through the hole. The timing marks on the camshaft pulley should align with the cover pointer. If they do not align, rotate the crankshaft one full revolution and align the "Os" again. They should now align. When every thing is lined up like this, your engine is timed to #1 at TDC and the valves on #1 cylinder will be closed.
Now if the belt has already been removed or if the belt was broken, You may have to temporarily put the outer cover back on. You may have to put it on and take it off several times until you get things lined up. Time the crankshaft "Os" first. It will not matter which rotation you are on if the belt is not installed. (TDC is TDC - the piston doesn't really care where the valves are - that's the camshaft's problem LOL)
After the crank shaft is lined up, turn the camshaft so the timing marks line up with the pointer. Then remove the front cover and install your belt.
After setting the timing belt tensioner, rotate the engine two full turns clockwise and recheck to make sure that all the timing marks still line up. If they do not - repeat the procedure.
The engine is a free running type so bent valves should not be the problem. Recheck the timing marks on the camshafts and crankshaft. If you are one timing belt tooth off, the engine could run but run rough. With the number 1 cylinder piston at top dead center, the camshaft marks should be lined up with their "TDC" marks and the crankshaft mark should be at 0 deg.
If the distributor was removed during the belt replacement, make sure it is in time with the crankshaft timing mark. When the No. 1 cylinder piston is at top dead center, the crankshaft timing mark should be on 0 deg. and the distributor rotor should be pointing to the number 1 terminal on the distributor cap at the same time.
the little dot on the crankshaft sprocket has to be aiming staight up and you will also need to remove the #1 spark plug to make sure the piston is at top dead center.you can check if it is all the way up by using a long,thin screwdriver and putting it in the spark plug hole.if the piston is not all the way up.you will need to turn the crankshaft 1 whole turn clockwise and stop when the dot on the sprocket is aiming up agin.the piston should now be at top dead center.i hope this information helps.take care and good luck, manny
Lis the engine getting fuel and spark? If it is then the problem is the distributor is off. Bring the number 1 piston up to top dead center. The first piston on the passenger side of the engine. Then align your distributor for before number one on the cap. When you slide the distributor into place it should line up with number one on the cap. Mark number one on the distributor with a marker. The cap is marked for number one. Put it all back together and the engine should fire up. Then time the engine
Factory timing for all 90-93 normally aspirated Celicas (ST, GT, and GT-S) is 10º before top dead center (BTDC). This means when the crankshaft angle of the number one cylinder reaches 10º, the spark plug will fire. It fires before it reaches top dead center (TDC) because the flame front takes time to fully combust and push the piston downward. this site might help u .http://www.toyotacelicaonline.com/timing.htm
set the timing marks on the crankshaft and the cam marks head to head the marks should be with the cylinder number 1 an tdc top dead center on the compression stroke then adjust the cam so the marks are aligned remember the number 1 piston has to be @ tdc and the crank and cam marks are lined up ok bye for now good luck with it
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