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Cam Chest Cover Installation

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pelee islander

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Posts: 18

Joined: Tue Sep 18, 2007 9:11 am

Location: Canada

Post Tue Nov 19, 2013 11:55 pm

Cam Chest Cover Installation

When trying to install my cam chest cover it starts to bind up when it is about halfway on. At that point the the wheels are bound as well.
Everything moves freely without the cover on. The cams slide easily into the bushings in the cover when out of the crank case.

What am I doing wrong? Thanks.
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Pa

Site Admin

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Joined: Sun Mar 12, 2000 1:01 am

Location: Ohio USA

Post Wed Nov 20, 2013 7:44 am

Re: Cam Chest Cover Installation

If it actually binds up halfway on, it would sound to me like you have the wrong cam gear [later cam gear] in the rear intake position or you have the wrong gear cover for the cam set being used. It would be an endplay issue.
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wilko

Posts: 159

Joined: Fri Jan 15, 2010 7:36 pm

Post Wed Nov 20, 2013 5:15 pm

Re: Cam Chest Cover Installation

Are the barrels fitted? If so deadjust your tappets to take tension off them.
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pelee islander

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Posts: 18

Joined: Tue Sep 18, 2007 9:11 am

Location: Canada

Post Wed Nov 20, 2013 8:02 pm

Re: Cam Chest Cover Installation

Pa, I will check but the cover does not seem to get far enough on to be an end play issue.....I don't think.....How much different in length is the later rear intake cam gear?

Wilko, no cylinders or tappet guides installed yet.

Thanks for the suggestions.
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Pa

Site Admin

Posts: 4755

Joined: Sun Mar 12, 2000 1:01 am

Location: Ohio USA

Post Wed Nov 20, 2013 10:38 pm

Re: Cam Chest Cover Installation

If memory serves me correctly, the length difference between early and later cam gears is roughly 3/32". Will the cover go on all the way if you do not have any of the cam gears in it ? You can also tell if you have the wrong cam in it if the cam lobe looks to be off center when looking down through the tappet block opening.
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pelee islander

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Posts: 18

Joined: Tue Sep 18, 2007 9:11 am

Location: Canada

Post Wed Nov 20, 2013 11:01 pm

Re: Cam Chest Cover Installation

Pa, yes the cover goes on fine with an empty chest. I will try installing one cam at a time then the cover to see just when the binding starts.
Just need to get home so I can spend some quality time with my project.

Thanks for the reply.
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Bison

Posts: 19

Joined: Tue Oct 29, 2013 9:02 am

Post Thu Nov 21, 2013 5:50 am

Re: Cam Chest Cover Installation

Have you tried fitting the cams into the cover?.
Alan.
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don

Posts: 554

Joined: Fri Oct 01, 1999 12:01 am

Location: Spokane WA USA

Post Thu Nov 21, 2013 6:07 pm

Re: Cam Chest Cover Installation

Why was the cam cover off?
Did You fit new bushings?
If so One bush might be hour glassed from install.
don
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pelee islander

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Posts: 18

Joined: Tue Sep 18, 2007 9:11 am

Location: Canada

Post Thu Nov 21, 2013 8:07 pm

Re: Cam Chest Cover Installation

Thanks for all the replies.

The cases are NOS and never been a motor yet. I am told that the cases and cover were line reamed together.

Everything spins fine with cams in the cases but no cover. I will try the cams in the cover for fit. Then I will try one cam at a time in the cases with the cover to see where the problem is.

Thanks again for all the help and suggestions.
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pelee islander

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Posts: 18

Joined: Tue Sep 18, 2007 9:11 am

Location: Canada

Post Wed Dec 25, 2013 12:03 pm

Re: Cam Chest Cover Installation

Pa wrote:If it actually binds up halfway on, it would sound to me like you have the wrong cam gear [later cam gear] in the rear intake position or you have the wrong gear cover for the cam set being used. It would be an endplay issue.


I have been out of the country just getting home for Christmas. Finally had a little time to play with this problem today and it seems Pa is correct. The #2 cam sits proud of the cam chest mounting surface by about 3/16 inch. Not sure why it took this long for me to notice that.

Thanks all and Merry Christmas.
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Pa

Site Admin

Posts: 4755

Joined: Sun Mar 12, 2000 1:01 am

Location: Ohio USA

Post Thu Dec 26, 2013 8:48 am

Re: Cam Chest Cover Installation

pelee islander wrote:
Pa wrote:If it actually binds up halfway on, it would sound to me like you have the wrong cam gear [later cam gear] in the rear intake position or you have the wrong gear cover for the cam set being used. It would be an endplay issue.


I have been out of the country just getting home for Christmas. Finally had a little time to play with this problem today and it seems Pa is correct. The #2 cam sits proud of the cam chest mounting surface by about 3/16 inch. Not sure why it took this long for me to notice that.

Thanks all and Merry Christmas.


You are not the first to learn of this type of issue. I learned the way you learned. ;)
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44dwarf

Posts: 318

Joined: Mon Feb 06, 2006 1:22 pm

Location: north central Ma.

Post Tue Dec 31, 2013 4:41 pm

Re: Cam Chest Cover Installation

I once got a fortune cookie that read "To be old and wise you must first be young and stupid"
We all learn from stupid things like this. Glad you found it before bolting on the cover and breaking things.
I'm still waiting for the last part of the fortune to finish up. :lol:
"Smok'in the competition NOT Tobacco"
"Transplant organs, Don't bury them!"
Why dwarf? 5/8 scale race cars! http://www.dwarfcarracing.com

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