smithmi

I took out the rear timing chain on my 4.0 engine. (Explorer 2001 4x4). The cam did move during this process. Now I can't get any compression on #1 cylinder. Dont know how to set the camshaft. So I can locate #1 cylinder on the compression stroke. Any help PLEASE.

RLXXI

Unfortunately there are a couple special tools required to set the cams and crankshaft where they need to be, you have no doubt already figured out there is no key way on the cam.

Without those tools you will not be able to set it properly, that engine is an interference engine meaning if you don't get the cam set properly you will bend valves the first time you try to crank the engine up.

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smithmi

Thank you Rnlcomp.

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imp

Actually, you CAN set the cam timing in the right place without special tools. I saw a pic or two showing it in an Explorer forum. If I can find it, I'll come back with the post. imp


edit: Try this:




http://www.explorerforum.com/forums/...d.php?t=287416

RLXXI

That would be an impossibility on that engine, German designed 4.0 SOHC engine cams don't have key way's or splines, the gear is press fit on a tapered design meaning only the torque of the bolt holding it to the cam keeps it in time. (poor design)

Maybe you're thinking of the 4.0 over head valve Ford engine, that is just like a small block chevy or any other pushrod type engine.

Or maybe you saw where someone tied the cam gear and chain together to keep the chain from dropping down inside the block.

I would love to see how setting the cam timing without those tools is performed.

RLXXI

Just as I suspected, you didn't read the article, he not only mentions the special tools required several times but even posted a picture of them in this post, http://www.explorerforum.com/forums/...38&postcount=9


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