Interference Issue With Cam Sprocket

Stang3.8 · March 29th, 2008, 07:28 PM

I have a problem. When I installed the new comp cam shaft and new timing chain and sprockets on my 98 3.8L there is so much resistance on the cam from turning I can barely crank the engine. Is there some kind of spacer I need to install? What am I missing here?

stephen · March 30th, 2008, 05:35 PM

Originally Posted by Stang3.8

I have a problem. When I installed the new comp cam shaft and new timing chain and sprockets on my 98 3.8L there is so much resistance on the cam from turning I can barely crank the engine. Is there some kind of spacer I need to install? What am I missing here?

At least on the 99 Mustang, which I have, there is a spacer on the end of the cam under the thrust plate. It may have to be transferred from the old cam to the new one. It appears to be pressed on.

Stang3.8 · March 31st, 2008, 12:08 AM

Is there any way you could show me what you are talking about a diagram picture or something? I'm not sure if my model has that or not. Thanks for the response.

itschristorres8 · March 31st, 2008, 01:07 AM

Originally Posted by Stang3.8

I have a problem. When I installed the new comp cam shaft and new timing chain and sprockets on my 98 3.8L there is so much resistance on the cam from turning I can barely crank the engine. Is there some kind of spacer I need to install? What am I missing here?

yes. let me see if i have a picture of it

stephen · March 31st, 2008, 08:53 AM

Look at Fig. 4 in the following link. It shows the arrangement of the timing gears.

http://www.babcox.com/editorial/ar/ar90134.htm

The spacer is on the cam snout behind the thrust plate. I think this spacer would only effect the end play of the cam shaft.

Also be sure the balance shaft gear is the right way around. There is a timing mark on the side that faces away from the engine.

I have a post from a week or so ago that shows pictures of my engine rebuild. It has a picture of the balance shaft gears.

stephen · March 31st, 2008, 12:50 PM

I added a picture of the cam spacer in the following link

swalch - Photobucket - Video and Image Hosting

March 29th, 2008, 07:28 PM	#1
Stang3.8 Regular 1997 Ford Mustang Join Date: Sep 2007 Location: Duxbury, Massachusetts Posts: 72	Interference Issue With Cam Sprocket I have a problem. When I installed the new comp cam shaft and new timing chain and sprockets on my 98 3.8L there is so much resistance on the cam from turning I can barely crank the engine. Is there some kind of spacer I need to install? What am I missing here?

March 31st, 2008, 12:08 AM	#3
Stang3.8 Regular 1997 Ford Mustang Join Date: Sep 2007 Location: Duxbury, Massachusetts Posts: 72	Hmm... Is there any way you could show me what you are talking about a diagram picture or something? I'm not sure if my model has that or not. Thanks for the response.

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March 31st, 2008, 08:53 AM	#5
stephen Enthusiast Join Date: Feb 2007 Posts: 548	Look at Fig. 4 in the following link. It shows the arrangement of the timing gears. http://www.babcox.com/editorial/ar/ar90134.htm The spacer is on the cam snout behind the thrust plate. I think this spacer would only effect the end play of the cam shaft. Also be sure the balance shaft gear is the right way around. There is a timing mark on the side that faces away from the engine. I have a post from a week or so ago that shows pictures of my engine rebuild. It has a picture of the balance shaft gears.

March 31st, 2008, 12:50 PM	#6
stephen Enthusiast Join Date: Feb 2007 Posts: 548	I added a picture of the cam spacer in the following link swalch - Photobucket - Video and Image Hosting

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Interference Issue With Cam Sprocket

Interference Issue With Cam Sprocket

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