cam end play and core plug
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Elder User
Joined: Jan 2004
Posts: 867
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From: Eastern Pa
cam end play and core plug
I'm assembling my engine and when I checked the endplay on the cam it had none. So I tried turning the cam and it definately was rubbing somewhere. Pulled the thrust plate off and noticed the end of the cam seemed to be out of the block a very slight amount. I pulled the cam out and saw the it had been rubbing hard on the cam plug in the block, hard enough to make some filings. I looked closely at the plug and saw that it was not in true, that is the one side was down into the block a little and the other was just a little out of the block which went along with the wear I saw on the inside of the plug. I had a shop do the block. Is there a step in the block to stop the plug from going in any further? If so why am I rubbing on the plug and the thrust plate so hard? I really could use some help on this.
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Elder User
Joined: Jan 2004
Posts: 867
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From: Eastern Pa
According to the pictures I've looked at an Christ's book all the other core plugs have the cupped side facing out but the cam plug should be opposite of them. I put a dial indicator on the end of the cam bolt and the gear with everything torqued and it had no give. As I said it was grinding on the the rear plug and the thrust plate.
Needsmorecoffee.
Joined: Oct 2004
Posts: 3,624
Likes: 2
From: CT
Yep open side in. There is no lip just the cam bearing behind it so take care installing it the correct way. The cam plug will just bottom out against the cam bearing inside the block. I use a little sealer on the outer edge of the back of the plug. Use a large socket to tap old plug out and new plug in. G.
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Elder User
Joined: Jan 2004
Posts: 867
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From: Eastern Pa
If there is no lip how are you ever going to get the proper endplay on the cam. I just found a picture of it in Steve Christ's book and it definately bottoms out in the bore. I still don't know what the end of the cam rides against in the back.
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Cargo Master
Joined: Feb 2004
Posts: 2,070
Likes: 169
From: Central Texas
The cam plug has nothing to do with the endplay. It should not touch at all - ever. Endplay is established by the thrust plate. The thrust plate is sandwiched between the cam and the timing gear. The gap between them establishes the endplay.
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Postmaster
Joined: Nov 2002
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From: Littleton, CO
Originally Posted by tastyklair
Yeah 
The guy at the shop had no clue. Fortunately I got the rotating assy done elsewhere. 
The guy at the shop had no clue. Fortunately I got the rotating assy done elsewhere. --Mike
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