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Unread 08-24-2010   #1 (permalink)
GTStangNWash is offline Apprentice

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Default 4.6 SOHC timing

I know you all have probably seen lots of threads on timing the 4.6.... I apologize for another one. There are lots of great information on setting the timing on these, but I can not seem to find one that is specific enough to mine.

On the drivers side head there are two marks on the cam gear. Which one am I supposed to use? I found a great segment on setting the timing but their gears and the marks were a lot different than mine. Also, does anyone have a good photo of the timing set perfectly at TDC? I do not have the timing tools, and I really need to get this up and running asap.....

Here are some pics
http://i59.photobucket.com/albums/g2...8-24175829.jpg There are marks about the 12 o clock and another at the 5 o clock positions

http://i59.photobucket.com/albums/g2...8-24175818.jpg

Any advice would be much appreciated

Thanks ahead of time
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Unread 08-24-2010   #2 (permalink)
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You can do a search in the top right and you'll find a few threads at least, one fairly recently has a very good link, but here's one that's almost as good that I have bookmarked. Take your time, its very common to set them off a tooth.
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Unread 08-24-2010   #3 (permalink)
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Quote:
Originally Posted by racin366 View Post
You can do a search in the top right and you'll find a few threads at least, one fairly recently has a very good link, but here's one that's almost as good that I have bookmarked. Take your time, its very common to set them off a tooth.
where is it? lol
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Unread 08-24-2010   #4 (permalink)
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Here is the link that I printed off and was using as an example.

Timing the 4.6L SOHC Engine


The cam gear and timing marks are completely different on the drivers side head than on mine. This link shows that the drivers side head has a protruded mark and a sunken mark. On my cam gear there is one protruding and a pair of holes. Do I use the hole or the large mark? Both my NPI and PI heads have very similar gears and marks.

That link to the diagrams is an excellent example to follow and by far one of the best threads on how to do timing I have seen yet....... Kudos to the author!!
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Unread 08-25-2010   #5 (permalink)
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Sorry, my bad, forgot to post the damn link. Boo on me, here it is.

How to set the timing on the 4

I know it says timing on the 4, but just read it, it's nearly the same as the one OP found and works. Not sure about your question, will get back.
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Unread 08-25-2010   #6 (permalink)
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ok, in comparison to the above instructions on how to set the timing this is what I got.....

http://i59.photobucket.com/albums/g2...0GT/new046.jpg

http://i59.photobucket.com/albums/g2...T/new052-1.jpg

let me know what you think.....Thanks
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Unread 08-25-2010   #7 (permalink)
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Did you take the chain off and mark the end links or did you reuse the factory copper colored link?
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Unread 08-25-2010   #8 (permalink)
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The large hump on the gear triggers the cam sensor and the small imprint is the timing mark. I read this on a thread just the other day so I can not say this for 100%, but I'm 99% on this one. It make sense - it's how proximity switches work.

Good luck
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Unread 08-25-2010   #9 (permalink)
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The chains were replaced. There are no copper chain links with these unfortunately.

I can see from the top of the timing cover down where that sensor sits on the drivers side. It is slightly off from the mark on the cam gear at TDC....I hope this is correct.
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Unread 08-25-2010   #10 (permalink)
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Quote:
Originally Posted by GTStangNWash View Post
The chains were replaced. There are no copper chain links with these unfortunately.

I can see from the top of the timing cover down where that sensor sits on the drivers side. It is slightly off from the mark on the cam gear at TDC....I hope this is correct.
You need marks on the chain to time it correctly. If your current chain does not have marks thats fine, you can make your own. Take the chains off and lay them flat on a bench. Push the 2 sides together so that you have 2 rows of links running parallel. The links at the end will be at a 90 degree angle to the parallel links. Mark the 2 end links on both chains. When installing the chains, one end link from either chain will line up with the mark on the crank sprocket at the 6 o'clock position. Next you will line the marks on the other end of the chain with the marks on the cam sprockets. If you do it this way its almost impossible to set it out of time. I have done all of the 2v 4.6, 5.4, and 6.8 liter engines this way since they were introduced and have never set one up out of time. Hope that helps a bit.
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Unread 08-25-2010   #11 (permalink)
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At TDC there is small dot on the crank sprocket which will be at the 6 o'clock position.
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Unread 08-25-2010   #12 (permalink)
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Ok....great information I appreciate that, I knew there had to be a more simplistic way of doing it then buying the timing tool.

I have the hole in the crank gear in the 6 o clock position. I used that link provided earlier as an example and counted links to and from the guides (redneck) so the result matched the pictures provided.

Great info about lying the chains out flat......I wish I would have thought of that !!!
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