Question about 1984 Toyota Corolla

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1984 Toyota Corolla Timing Problem

I have just replaced timing belt in my 1984 corolla sr5. I have literally set everything i can think of to where it should, in theory, be. The cam pulley is at 0, the crank is at -5 btdc as spec'd by my manual, and the dizzy is set to fire on the number 1 plug. Everything is lined up before, and AFTER i run the car, but when i run it, my timing light shows that it is WAY off and the number 1 plug is firing at something like -30 btdc. But as soon as i shut the car off and recheck everything, its all still lined up. I am at my whits end, as I am new to mechanic stuff, and was really hoping this would all turn out well. If anyone has ANY ideas, PLEASE let me know asap. Thanks.

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  • si1lypanda Feb 17, 2009

    Yes you are correct, i was mistaken. I know now that the crank needs to be at 0, but i guess i just dont get HOW to set the belt, cuz if i have the crank at 0 and the cam pulley set to the mark, there is NO way the belt teeth line up on the pulleys. As soon as i tighten things up and crank it over, the mark is not at 0 anymore. I dont get how to make minor adjustments once the belt is on the pulleys. is there a trick?

  • si1lypanda Feb 17, 2009

    ok. more problems. first of all the timing belt that i bought, does NOT have any marks of any sort. i called the shop about it and they told me it doesnt' have any specific way that it goes on. Ok so now im curious about the crank pulley. i see the notch on the pulley, which is quite a bit diff than the white mark on the pulley that i WAS using as tdc, so hopefully the factory notch on the side is the right one. Ok now to finding 0. should there be a mark ON the block of some sort. Right now, my engine has a plastic cover that slides over the crank that rests behind the crank pulley that has numbers on it goin from left to right 20, 15, 10, 5, 0, 5. should i assume that the 0 on this , is 0 for the crank or is there a mark i need to line it up with instead? I've been trying to line up the new notch with the 0 on the plastic cover and the cam over the dot on the block but the belt teeth will not line up with the teeth on the gears. the closest i can get the teeth to line up is at -5. Im just wondering if there is something wrong with the belt i bought or am i doing something wrong? it seems like the belt needs to move like half a tooths distance, but of course that would put the teeth ontop of the gear teeth. bleh. any help would be great thanks.

  • Toyota Ed May 11, 2010

    Send your e-mail address to this address:

    fixya_toyota_ed@yahoo .com

    Note the underscores; copy and paste this address into your e-mail utility. You cannot use that address from FIxYa.

    I will send you detailed instructions back. This is the only way you are going to get this baby timed right.

  • Toyota Ed May 11, 2010

    Have the cam and the crank pulley set at TDC.

    Install the belt.

    The single dot (on the belt) should be aligned with the mark on the cam pulley, the dots on the belt should face away from the engine.

    The double dots (on the belt) should sandwich the single dot on the crank pulley, the crank pulley dot is at 5 o'clock, with the crank pulley at TDC

    Loosen the idler pulley slightly.

    Manually rotate the engine CLOCKWISE 2 complete revolutions, TDC to TDC.

    Ensure that the pointer is visible in the hole in the crank pulley

    Ensure that the "V" notch on the crank pulley is aligned with the dot behind the crank pulley.

    Tighten the idler pulley 22/32 ft lbs

    Measure belt deflection: 0.24-0.28 inches

    This should get you going.

  • Toyota Ed May 11, 2010

    Hi. Let me try to help you.

    You say that the "manual tells you to set the crank pulley to

    -5 BTDC"?

    That specification is incorrect.

    The correct spec is the crank pulley at O, the cam pulley at 12 o'c'clock, with the pointer visible thru the hole in the cam gear, dist set to number one compression. The rotor should be under number one dist cap tower.

    No where does Toyota spec out timing marks at anything other than zero on the crank pulley.

    Retime it to Zero on the crank pulley and let me know how it runs.



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Do to federal regulations,emissions have to be keep at minimum.Modern cars have a computer that's sets the firing timing to control this. If your rpms are ok, then don't pay attention to it.

Posted on Feb 18, 2010


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