| Re: [GMCnet] Double roller or single roller timing chain? [message #356290] |
Wed, 01 July 2020 09:23 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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If you do use a roller chain set, be sure that your chain has the
tru-roller feature. That is the rollers are free to rotate on their
individual axles, and are not riveted tightly to the side plates. That way,
the wear is distributed evenly to the entire chain, not just the part of
the roller that contacts the sprocket teeth. Key ways? What Matt said. When
using aftermarket parts, always degree your cams in.
Jim Hupy
Salem, Oregon
On Wed, Jul 1, 2020, 7:08 AM John Wright via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Johnny,
>
> Since I have been doing GMC’ing since August of 1998 the subject of
> replacement cam chain set has be discussed a multitude of times with
> varying opinions.
>
> Your original factory cam drive set had a nylon teeth on the camshaft end
> and that is what wore out. The standard expression was that if you had
> 140K+ miles one your motor you should consider replacing the less it fails
> and really do some damage.
>
> As far back as when we bought our coach and before that the replacement
> cam gear/chain set was alway the Cloyes True Roller Time Chain Set. It has
> gone up in price over the last 10 years or so.
>
> https://www.jegs.com/i/Cloyes/220/9-3113.010/10002/-1
>
> The Lunati set up is some what less.
>
> https://www.summitracing.com/parts/lun-93113
>
> There are a number of clones available out on Ebay, but be VERY CARFUL!!
> You can probably find a double for the 330 thru 455 engine family at your
> local parts supplier.
>
> J.R. Wright
> GMC Great Laker MHC
> GMCGL Tech Editor
> GMC Eastern States Charter Member
> GMCMI
> 78 GMC Buskirk 29.5’ Stretch
> 75 GMC Avion (Under Reconstruction)
> Michigan
>
>
>
>> On Jul 1, 2020, at 8:38 AM, Johnny Bridges via Gmclist gmclist@list.gmcnet.org> wrote:
>>
>> If there is a downside to a double roller setup other than it costs a
> bit more, I'm not aware of it - Gurus?
>> The upsides are less wear on chain and sprockets so longer life, and as
> I understand it a bit less load. Either way I've always used the double
>> roller.
>>
>> --johnny
>> --
>> Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
>> Braselton, Ga.
>> I forgive them all, save those who hurt the dogs. They must answer to
> me in hell
>>
>>
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