Gen 6 HR cam in a Mark IV??? - Page 4 - Chevelle Tech
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post #46 of 55 (permalink) Old Apr 8th, 14, 10:41 PM
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Mike
 
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Re: Gen 6 HR cam in a Mark IV???

If it spins free I would be happy but there is no good reason not to give it a little clearance if it makes you feel warm & fuzzy
I think you will find if you put an indicator on it & lightly pry the cam back & forth you will find you actually have clearance if it rotates freely

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post #47 of 55 (permalink) Old Apr 9th, 14, 11:46 AM
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Dale
 
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Re: Gen 6 HR cam in a Mark IV???

John, it sounds like you're getting it to work but just a thought-
Did you verify that the bearing is seated against the gear? If I remember
correctly, you can check this easily with feeler gauges.

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post #48 of 55 (permalink) Old Apr 9th, 14, 3:18 PM Thread Starter
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Re: Gen 6 HR cam in a Mark IV???

Quote:
Originally Posted by Monk View Post
John, it sounds like you're getting it to work but just a thought-
Did you verify that the bearing is seated against the gear? If I remember
correctly, you can check this easily with feeler gauges.
I'm no expert on how to install a torrington bearing! This came installed and it appears to be seated all the way- how do I know for sure?

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post #49 of 55 (permalink) Old Apr 9th, 14, 4:09 PM
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Dale
 
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Re: Gen 6 HR cam in a Mark IV???

I wouldn't get too excited over it since everything is very close as is, but if you want to check, see if you can stick a .002 feeler between the mating surfaces where the bearing is pressed up against the gear.

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post #50 of 55 (permalink) Old Apr 9th, 14, 5:24 PM
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Re: Gen 6 HR cam in a Mark IV???

I did not have time to read this whole post but I had the same problem this last winter. I used a valve spring shim between the cam gear and cam. I used my die grinder to grind three reliefs for the bolts then sandwiched it between the gear and the cam. I think the one I used was .015 and I went from having to use a wrench on the bolts to turn the cam to spinning it easily.
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post #51 of 55 (permalink) Old Apr 9th, 14, 9:59 PM Thread Starter
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John
 
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Re: Gen 6 HR cam in a Mark IV???

Quote:
Originally Posted by Wolfplace View Post
If it spins free I would be happy but there is no good reason not to give it a little clearance if it makes you feel warm & fuzzy
I think you will find if you put an indicator on it & lightly pry the cam back & forth you will find you actually have clearance if it rotates freely
Thanks- I went for the warm and fuzzy! There really was zero end play per my dial indicator. My machinest at work gave me exactly .002 on the indicator... time to get this thing running!

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post #52 of 55 (permalink) Old Apr 9th, 14, 11:29 PM
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Re: Gen 6 HR cam in a Mark IV???

Glad ya got it figured out

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post #53 of 55 (permalink) Old Apr 10th, 14, 10:23 AM
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Re: Gen 6 HR cam in a Mark IV???



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post #54 of 55 (permalink) Old Jun 30th, 14, 3:47 PM
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Re: Gen 6 HR cam in a Mark IV???

This is a great thread.

I had the same problem on my MK. IV block with Gen 6 nose H.R. and rollmaster cs2095 timing set. When I bolted the cam gear onto the camshaft and tightened the bolt, the cam gear pulled snug against the thrust plate. Solution was to install shim between cam and cam gear. I'm still playing with thickness of the shim to get the endplay within reason. And yes, the crank gear is a little bugger. Just when you think its on all the way......it wasn't. Needed bigger hammer on that too!

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post #55 of 55 (permalink) Old Mar 9th, 16, 7:01 PM
Brian
 
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Re: Gen 6 HR cam in a Mark IV???

I am having the same problem with the same setup. I found that the Torrington bearing inner race is hitting the thrust plate and plate ID needs to be opened up just past the 3 retainer tabs that hold the bearing together like the OP did to his. Another pain in the butt as I have 6 of these to do.
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