Re: Comp Cams cam button
[Re: gss]
#1769685
04/01/15 05:27 PM
04/01/15 05:27 PM
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Joined: Jan 2003
Posts: 31,200 Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,200
Oregon
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Quote:
Well this is starting to get a little aggravating. The cam/lifter/timing gear set I got from Comp cams didn't include the required cam button or the 3 cam bolts. So I get the recommended button from CC and the smallest head cam bolts I can find from ARP and the button still doesn't fit without hitting the bolt heads. Am I expected to put this button in a lathe and turn in down? There has got to be a better solution. What do you guys do with these?
It is all application specific. I think most engine builder come up with a combination that works for them. I used to use Hex-a-just timing sets with my own cam button and ARP bolts. But as soon as you switch brands you run into issues. Everyone builds their stuff to slightly different dimensions. Typical hot rodding problem.
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Re: Comp Cams cam button
[Re: AndyF]
#1769686
04/01/15 06:10 PM
04/01/15 06:10 PM
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Joined: Oct 2005
Posts: 9,031 Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 9,031
Ontario, Canada
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Quote:
they only fit if I leave out the washers
Ditch the washers.
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Re: Comp Cams cam button
[Re: gss]
#1769688
04/02/15 09:05 AM
04/02/15 09:05 AM
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Joined: Feb 2006
Posts: 1,057 The Great White North
RAMM
super stock
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super stock
Joined: Feb 2006
Posts: 1,057
The Great White North
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Just went through this last week. Had to turn down the button in my lathe. PITA for an issue that should have been solved 20+ years ago. J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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Re: Comp Cams cam button
[Re: gss]
#1769689
04/02/15 11:49 AM
04/02/15 11:49 AM
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Joined: May 2010
Posts: 485 Central California
MoParFish
mopar
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mopar
Joined: May 2010
Posts: 485
Central California
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Quote:
After taking a closer look, even after removing the washers, the button still hits the ARP bolts. Allen head bolts are even larger in diameter than the ARP bolts. If someone here has installed a Comp Cams nylon button, I would like know how you cleared the bolts.
I went through the same thing on the first one I did. I turned the button around and machined(actually did it with drill and bench grinder when I didn't have access to a lathe) the big end to fit the timing gear and faced it so the large end step goes flush with the face of gear. Then the bolts and washers capture the button so it can't fall out. Now, I keep a 1" diameter piece of Delrin acetyl plastic around and make them as needed. Done a couple since. I machine the cover side of button small enough so there is no problem with bolt or washer interference. Like said, I did the first one with a drill and grinder. Not too sterile but that motor has been thrashed on with a ton of nitrous and still together sitting on the floor ready for it's next venture. Sorry, don't have a pic.
P.S. As memory serves on that first one, the small end was too big to chuck in drill so I drilled a 1/4 inch hole through the center of the button as straight as possible, then pressed the appropriate size drill bit in to serve as a mandrel and worked slow. Again, not ideal but did what I did. For the others, I used a lathe, much nicer
Last edited by MoParFish; 04/02/15 12:03 PM.
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Re: Comp Cams cam button
[Re: Stanton]
#1769691
04/02/15 12:41 PM
04/02/15 12:41 PM
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Joined: May 2009
Posts: 511 Temperance, MI
68 HEMI GTS
mopar
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mopar
Joined: May 2009
Posts: 511
Temperance, MI
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just take a die grinder and a burr and clearance the 3 spots where it hits the bolts. not a big deal.
68 Dart GTS "HEMI" 10.30 @ 131 pump gas street car 3780# 69 Roadrunner 511 six pack 10.92 drive to track street car
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Re: Comp Cams cam button
[Re: 68 HEMI GTS]
#1769692
04/05/15 11:13 PM
04/05/15 11:13 PM
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Joined: Jan 2003
Posts: 1,123 State, country, etc.
gss
OP
super stock
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OP
super stock
Joined: Jan 2003
Posts: 1,123
State, country, etc.
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Quote:
just take a die grinder and a burr and clearance the 3 spots where it hits the bolts. not a big deal.
That is what I ended up doing. End play is .012". If I leave the gasket out, then I measure .009". I am surprised it is that loose. I would think they would make them oversize so they can be cut down for the desired end play. I'd rather not dimple the timing cover or weld to the inside so I may just go with the .012". Max end play is usually around .010" but I don't see another .002" causing problems. What do ya think?
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Re: Comp Cams cam button
[Re: gss]
#1807267
04/19/15 10:14 PM
04/19/15 10:14 PM
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Joined: Oct 2005
Posts: 9,031 Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 9,031
Ontario, Canada
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Would a little duraglass or epoxy putty between the water pump and timing cover work? Absolutely !! Stick a piece of saran wrap to the timing cover first so it only sticks to the water pump.
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