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emoore924 · Joined: 13 Apr 2004 Posts: 2822

...and the cam lobes wear due to poor oiling and lash adjustment being let go too long.

So you need to check carefully how each lobe is doing by taking off the valve cover and rotating the engine by hand using a wrench on the main pulley. Take out of gear. Turn engine clockwise (pull up from passenger side). Look at the lobes as the cam turns. There should be no discoloration or flat spots or it is time for a new cam, and maybe followers, and maybe a new oiler tube elbow...

loddyjr · Joined: 05 May 2012 Posts: 20 Location: Kingwood, TX

Thanks everyone for you comments, I removed the valve cover and will inspect the oiler tube. I still need to get the haynes manual or a procedure to check the clearances. Probably .010-.020. Thanks again for everyones feedback its appreciated!

emoore924 · Joined: 13 Apr 2004 Posts: 2822

Actually, you'll need to be more precise than that or you risk messing up an expensive-to-fix valve train.

Search and ye shall find the procedure.

Clearance specs cold are .004mm intake and .016mm exhaust, +/- .001.

You will need a tiny 3mm hex socket. Each turn of the adjusting screw (when it "snaps") = .002. Rotate the engine once with a wrench on the main pulley each time you adjust (settles the cam/follower clearance so you can measure again).

You also need to be sure not to turn the screws in or out too far or you will break the follower because the screw will only be supported on one end. If you can't get the clearance right with the screw that's in there, you'll have to remove the cam and swap screws, but that's a bit of a procedure. IIRC you get three turns from center, so +/- .006 from the clearance you have when the screw is centered.

Read up on the procedure. It isn't hard but you do have to get it right.