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Shaft is notched which dirrection do the notches face?
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Posted on Jan 02, 2017
according to a manual , the crank key will point to arrow , the intake cam should have an letter i aligned with arrow on belt cover and exhaust cam should have letter e aligned with arrow on belt cover , and as always rotate the engine 2 full turns to inspect timing marks before cranking or trying to start the engine . if you haven't taken the original belt off yet , paint your marks for quicker reference .
Posted on Jan 02, 2009
I have a 1996 Olds Bravada with a 4.3L Vortec 6. The two grooved notches on the harmonic balancer are not used in timing as far as I can tell. Look for a small peg on the back of the harmonic balancer, and once found, you will be able to see it and line it up with the "v" marks on the timing cover. Keep in mind this is on the 1996, but I thought it might be the same since I had a similar problem of trying to figure out which marks to use until I found the peg. You should be able to feel it also.
Posted on Jun 03, 2009
SOURCE: im replacing the timing belt
#1 cylinder is to the left as you look at the belt. Either way, I recommend you use the timing mark on the crankshaft, which is more accurate way to get TDC (see diagram below). The key to getting timing belt right is to first get all the sprockets on their marks. Then retract the tensioner and put the belt on loose. To prepare for releasing the tensioner, start with holding the belt to the left cam sprocket and pull it tight to the right sprocket. There can be no slack between the 2 sprockets. Then pull down to the crankshaft sprocket and push the belt knobs into the sprocket--again no slack between the cam sprocket and the crank sprocket. All of the slack should now be on the left side, by the tensioner. While holding the belt like this, release the tensioner onto the belt. Make sure the belt has not slipped a tooth between the sprockets, and tighten the tensioner. Rotate the engine a couple revolutions back to the timing marks and double-check the timing. loosen the tensioner and push it tight against the belt, then tighten it again. If you are not sure about anything I said here or have any questions at all, please don't hesitate to ask. I do not want you to have to take the cover off this timing belt again.
Posted on Dec 05, 2010
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