Question about 1998 Isuzu Rodeo
You didn't say whether you had a V6 engine or a 4cyl. Here is the procedure for a V6, 3.2L for 1998 - at least 2002.
It sounds like he moved the cam shaft independently of the crankshaft or other camshaft so you will need to do all these procedures:
1. Turn the crankshaft until the mark on the spocket is lined up with the mark on the oil pump housing (the mark is on the driver's side at 90 degrees to the sprocket itself).
2. Back off the crankshaft counterclockwise 1/8 turn to ensure the pistons aren't at top dead center. This gives the valves room to move without hitting the piston.
3. Turn the passenger's side camshaft until it "jumps" into place with the alignment mark on the camshaft pully is pretty close to being lined up with the mark on the engine head.
4. Turn the driver's side camshaft until it "jumps" into place this should be perfectly lined up. If you turned the crankshaft 10 full rotations and it still doesn't line up at any rotation then choose the closest point with the mark off by 1/8 to 1/4 turn off from the mark. Then line it up by hand.
5. The idler pulleys and tensioner pulleys should be installed on the engine but the tenioner pulley adjuster (it is a little cylinder with a rod coming out of it that is held in place by 2 bolts) should be removed.
6. Place the new belt on the crankshaft first. Be sure the arrows on the belt point in a clockwise direction. If you have a belt with lines and dots then the lines will line up with all markings that you have lined up together on the camshafts. The dots should line up at the 270 degree point on the crankshaft (opposite of the lines and the markings). There should be a factory blue dot on the crankshaft where the belt dots should line up.
7. Loop the belt around the tensioner pulley, around the passenger's side cam, under the waterpump, around the driver's side cam, and finally around the idler pulley. Check all alignments.
8. Put the tesioner adjuster in a vise and squeeze it together until you can place a small drill bit or allen wrench through the holes to keep it compressed.
9. If all lines are aligned and the play is removed from the driver's side then this step should be easy. Hold the tensioner pully against the belt and install the tensioner adjuster. Then pull the dril bit or allen wrench to release the adjuster. Sometimes this step can be a bit tricky and you may need some moving of the belt to allow enough play to get the adjuster in place. This may move the passenger's side alignment. If so, you will need to try it again. I find that if you move passenger's side alignment mark clockwise by one tooth of the sprocket, then when you go to put the tensioner in place it lines up. You may find other tricks to overcome this challenge. Remove to remove the drill bit or allen wrench.
10. Once you think you have everything lined up. Use a wrench to turn the crankshaft sprocket 2 full turns. Listen closely and feel for any hard resistance as you do this to determine if the pistons are hitting the valves. If you believe they are hitting each other then repeat the adjustment procedure. Not doing this can ruin the valves or more.
11. If everything seems OK you can try turning the engine over with the ignition. If it doesn't start, don't keep trying. Assume you need to perform the steps again and realign everything.
I hope this helps.
Posted on Feb 22, 2009
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