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IMS Shift - Need To Check Timing


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As I was checking the IMS bearing, the IMS shifted slightly. I didn't tighten the set screws very tight, as instructed, but apparently I didn't tighten them enough. Anyways, now that the end of the IMS is slightly crooked, I'm afraid that the engine could have jumped time. My car is a 2002 with the 5-chain setup. What is the proper procedure for checking the timing? I will check that the marks that I made line up, but I want to double-check before I fire it up.

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As I was checking the IMS bearing, the IMS shifted slightly. I didn't tighten the set screws very tight, as instructed, but apparently I didn't tighten them enough. Anyways, now that the end of the IMS is slightly crooked, I'm afraid that the engine could have jumped time. My car is a 2002 with the 5-chain setup. What is the proper procedure for checking the timing? I will check that the marks that I made line up, but I want to double-check before I fire it up.

Quick and dirty: NMH (no manual handy)

pull the little green plugs on the cylinder heads. stab them with a screw driver and pry them out. You only need to do the one opposite each oil scavenge pump.

At TDC, one bank should be in line and you'll notice one side will be slightly inside the line on the cylinder head, while

the other side is the opposite, and you go one way through the crankshaft, the other side should be lined up and the positions

inside/outside will have swapped. One more time around and the original bank should be back where it started.

I don't remember off the top of my head which bank should be the TDC bank. You could check the firing order,

and then at TDC check the location of the piston by pulling the plug and putting a dowel rod in there.

If you are not perfectly north/south on both sides at TDC, then something has shifted.

You'll need to have 2 green plugs (about $5/per from sunset) to plug the cam openings back up

as they are one and done.

Mike

Edited by txhokie4life
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As I was checking the IMS bearing, the IMS shifted slightly. I didn't tighten the set screws very tight, as instructed, but apparently I didn't tighten them enough. Anyways, now that the end of the IMS is slightly crooked, I'm afraid that the engine could have jumped time. My car is a 2002 with the 5-chain setup. What is the proper procedure for checking the timing? I will check that the marks that I made line up, but I want to double-check before I fire it up.

Here is a complete DIY, with photos, by "Insite" on checking the timing: http://986forum.com/forums/showthread.php?p=227748#post227748

Regards, Maurice.

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