| Re: [GMCnet] Cam wear question. [message #237969] |
Wed, 29 January 2014 13:54  |
Jim Bounds
Messages: 842
Registered: January 2004
Karma: 0
|
Senior Member |
|
|
Update, my last contact says there is no problem, run it, there's no probkem. Ill go w ith that
Jim Bounds
-------- Original message --------
From: Jim Bounds <gmccoop@yahoo.com>
Date: 01/29/2014 8:33 AM (GMT-05:00)
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Cam wear question.
I took some time and read through this thread a bit. Did we build this motor? If so, it had to be a long time ago, I have not built flat tappet motors for some time. What lifters were used? There is a big difference in them. I think I too would go ahead and run it in paying attantion to lift now and later.
Jim Bounds
------------------
________________________________
From: John Heslinga <rbeeper@hotmail.com>
To: gmclist@temp.gmcnet.org
Sent: Wednesday, January 29, 2014 12:23 AM
Subject: Re: [GMCnet] Cam wear question.
For your Information: Here is one example of a camshaft regrinding Company that Parkerizes it's camshafts It's website is:
http://www.blakesreman.com/remanufactured-camshafts/
Here is a quote from the Web Page explaining the Parkerizing process.
Quote:
> Pakerizing Process for Rebuilt Camshafts
>
> The founder of Blake’s Remanufacturing, Robert Blake, discovered long ago that Parkerizing rebuilt camshafts and lifters helped them hold oil during the start-up process, thus making a smooth clean start-up that was less hard on the engine. Parkerizing is a three bath process that applies a non metallic absorptive coating to the outside surface of the rebuilt camshaft and lifters. This permits rapid break-in without scuffing the cam lobes. It also helps prevent against corrosion for the rebuilt camshafts and lifters in humid climates, and those stored for extended periods of time.
>
> The mains on the remanufactured camshafts are taped and not parkerized. When the remanufactured camshafts have completed Parkerizing we spray them with a dry graphite film lubricant, this also protects against corrosion and acts as a lubricant to prevent scuffing, scoring and seizing. Both processes will give the reman camshafts a Dark Charcoal Color. It is important once the reman camshaft has been parkerized to not remove the graphite spray or Parkerizing. We stand by this process 100% and believe it to be the most effective way to protect our reman camshafts for long durability. If for any reason you don’t want Parkerizing or graphite spray applied to your remanufactured camshaft please let us know ahead of time and we can accommodate the request.
Best Regards
--
John and Cathie Heslinga
1974 Canyonlands 260
455, Manny tranny and 1 ton, 3:73 LS,
TC4W "Too Cool For Words"
Retirement Projects Galore
Edmonton, Alberta
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] Cam wear question. [message #237987 is a reply to message #237969] |
Wed, 29 January 2014 16:53  |
pyolet
Messages: 78
Registered: August 2006
Location: Helena, MT
Karma: 0
|
Member |
|
|
Jim, I concur.
I spoke at length Comp Cams tech support today and they informed me that unless the customer orders the nitride finish option, all their flat tappet and custom grind camshafts (the 42-207-4 included), get a "Parkerized" finish (acid etched manganese phosphate) to aid break-in.
The cam comes out of the box a flat dark gray except for the journals. The lobe finish I described and sent pictures of, is typical of a cam that has been spun but not broken-in. The grainy color of the non-contact surfaces could have been a result of the zinc coating the assembler used and/or the makeup of the oil used in their spin tester. They said go ahead and break it in.
I did pull the rear cam galley plug out and inspected the id numbers on the cam, and it is indeed the comp cams 42-207-4 and the ser# matches the build tag.
I'm now confident that there isn't a problem with this cam and I'm moving forward with the build. Guess we do learn something every day. Thanks so much to you and the others on this forum for taking the time out of your busy schedule to look into stuff like this for us laymen worry warts. It's a great comfort. Aloha,
Woody.
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
