Question about 1998 Isuzu Rodeo
Guy replacing head gasket can't find the proper timing for our 1998 rodeo isuzu car
You didn't say whether you had a V6 engine or a 4cyl. Here is the procedure for a V6.
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 but this won't be perfectly lined up with the mark but will be about an 1/8 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. The dots should line up at the 270 degree point on the crankshaft (opposite of the lines and the markings).
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. This is the tricky part. You will need to install the tensioner adjuster and that will require 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.
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 thenrepeat the adjustment procedure. Not doing this can ruin the valves or more.
11. If everything seems OK. remove the drill bit or allen wrench from the tension adjuster. Perform step 10 again for one final check.
I hope this helps.
Posted on Feb 22, 2009
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Posted on Jan 02, 2017
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