Question about 1997 Oldsmobile Aurora

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Trying to time a 1997 aurora 4.0 northstar engine, cannot find the timing marks on the crankshaft

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  • bobbysox2410 Mar 20, 2011

    there are two white dots on the crankshaft and No dots on the intermediate gear, there is a oblong spot on the gear(intermediate) tho , is that the spot? and which white spot on the crankshaft?

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There is a dot on the crankshaft and a dot on the interment shaft sprocket the dot on crank should be at 12 o'clock the dot on the intermediate shaft should be at 6 o'clock so the dots are lined up, if you are having a hard time finding the dot the key-way in the crank needs to be a 1 o'clock.

i hope this helps.

let me know if there is any thing else i can do for you.

Posted on Mar 20, 2011

  • john nail
    john nail Mar 21, 2011

    if you turn the key way to one o'clock witch ever dot is at 12 o'clock is the one you use,as for the intermetate shaft there is not a clear pic. so if all there is is a oblong spot then that must be it, but you can check by seting tje camshafts if the oblong slot is at 6 o'clock with the camshafts in time then that is it.

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1. Turn the crankshaft until the timing marks on the crankshaft indicate TDC.
2. Make sure that the timing mark on the camshaft drive sprocket is aligned with the pointer on the inner belt cover.

Never turn the crankshaft of any of the overhead cam engines in the opposite direction of normal rotation. Backward rotation of the crankshaft may cause the timing belt to slip and alter the timing.

zjlimited_1193.jpg

Fig. 2: Timing belt assembly on the 2.3L and 2.5L engine (click image for zoom)

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Hi,


You find the timing marks on the picture below.

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Removal
Remove auxiliary 1. drive belts.
2. Support engine.
Remove:
Engine mounting and bracket.
Timing belt upper cover [1].
3.
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Installation
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4. tighten bolt [6].
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8. Slacken tensioner bolt 1/2 turn [6].
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Turn crankshaft slowly 1 7/8 turns clockwise until crankshaft pulley timing mark [3] aligned with 45° BTDC mark [10] on
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11. Tighten tensioner bolt [6]. Tightening torque: 42 Nm.
12. Install components in reverse order of removal.
13. Tighten crankshaft pulley bolt [4]. Tightening torque: 108 Nm.
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REMOVAL & INSTALLATION 1.8L Engine

(see Figures 1, 2, 3 and 4)
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Fig. 1: Timing marks are located on the camshaft pulleys as shown-1.8L engines

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Fig. 2: Make sure that the crankshaft sprocket (timing belt pulley) and oil pump timing marks are aligned-1.8L engines

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Fig. 3: Align the timing belt pulley mark with the tension set mark, at approximately the 10 o'clock position-1.8L engines

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Fig. 4: Check the timing belt deflection at the location shown-1.8L engines

  1. Make sure the camshaft pulley marks are aligned with the seal plate marks.
If the timing marks are not aligned, remove the belt and repeat the procedure.


I hope help you with this; remember rated this help. Good luck.

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moz-screenshot.jpg

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Help


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