Question about 2005 Mazda Tribute
If you have the cylinder head off it is easier to do but with the head on, put the balancer on and make a reference mark on it to the crank snout, then use a long bolt the exact size of the sparkplug threads, threading it into the #1 cylinder. Turn the engine slowly by hand 'till the bolt stops the piston.(be careful that the bolt does not interfere with valves) Make a reference mark on the outside of the pulley and a reference mark matching that position on the block. Turn the crank backwards till the bolt again stops rotation. Make another mark on the pulley in the same place the block mark is at. The halfway point between the two pulley marks is exact top dead center. You can then make another mark at the halfway point, remove the bolt and turn the new mark so it aligns with the block reference. At that time, the piston is at tdc and any mark you put on the pulley can be referenced with a corresponding mark you place on the block for permanent reference will always be tdc, probiding the first reference you made on the pulley and crankshaft are kept in alignment.
Once the crank has been indexed, you can set up cams, following timing chain replacement instructions in your manual. Once this has been completed, turn the engine four complete revolutions by hand and re-check your index points. There should be no valve interference or other binding, and all index points must align properly. What I've described is making a "poor mans" degree wheel. You can buy an actual degree wheel in most speed shops, and also information on using it, as well as performance setups that take advantage of changing the performance curve of your engine by changing crank/cam relationships. You may find some of that interesting and informative!!!
Posted on Aug 02, 2009
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Posted on Jan 02, 2017
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