[Fot] [6pack] Zinc Additive.

[MadMarx]

Yes - google finds loads of info about this.

But I think that if ZDDP would so important than loads of engines - even
modern engines - would fail with cam trouble.
The design has not changed much over the last 50 years.

I believe in problems with geometry of the cam/tappet design as cause for
all this trouble, as my cam problem was solved with grinding the tappets
flat.
Before that I lost 3 cams.

Cheers
Chris

-----Urspr|ngliche Nachricht-----
Von: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] Im
Auftrag von Robert M. Lang
Gesendet: Mittwoch, 2. November 2011 20:55
An: Ruffner, James A *HS
Cc: 6pack at autox.team.net; Irv Korey; fot at autox.team.net; DJFidler at rogers.com
Betreff: Re: [Fot] [6pack] Zinc Additive.

Google "ZDDP"

You'll get so much information, your head will explode.

Executive summary: yes, there is a correlation. The summary of the
correlation is that without ZDDP in break-in, cam failure is certain.
THere may be supporting data that without ZDDP during normal use that
failure probable - all things considered.

But there are other factors for excessive cam wear and you need to account
for ALL of them. Material surface hardness, proper materials in the first
place, proper break-in, proper valve spring pressure, proper rocker
geometry and so forth.

regards,
rml
---------------------------------------------------------------------------
Bob Lang              Triumph TR6!!            |  This space for rent
Former NER Solo Chair                          |
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On Wed, 2 Nov 2011, Ruffner, James A *HS wrote:

> Does anyone know what the correlation is between cam wear and the zinc
> additive?  I do not remember ever having heard of this.
> ________________________________________
> From: 6pack-bounces at autox.team.net [6pack-bounces at autox.team.net] On
Behalf Of
> Irv Korey [emanteno at comcast.net]
> Sent: Monday, October 31, 2011 7:38 PM
> To: DJFidler at rogers.com
> Cc: 6pack at autox.team.net; REK46 at aol.com; fot at autox.team.net
> Subject: Re: [6pack] [Fot]  Zinc Additive.
>
> On Mon, Oct 31, 2011 at 4:36 PM, David Fidler <DJFidler at rogers.com> wrote:
>
>> Brad Penn is still sold under the Kendall GR-1 name in Canada, available
>> from Crescent Oil in Hamilton, ON.
>>
>
>
> According to the Brad Penn website, the Kendall name was sold to a 3rd
> party when the refinery was sold. Because of that, the oil from that
> refinery had to be
> re-named, and they came up with Brad Penn. Kendall GR-1 may still be
> available, but unless they are buying it from the company that
> owns Brad Penn, it isn't the same oil that it used to be. NFI
>
> http://www.penngrade1.com/History.aspx
>
> Irv Korey
> 74 TR6 CF22767U
> Highland Park, IL
>
> ________________________________________
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>
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