[DeTomaso] [Land-speed] alum heads on the street

[Adin, David]

Always good to have the experts from GM!  Thanks Sparky.

-----Original Message-----
From: sparky.2211 at cox.net [mailto:sparky.2211 at cox.net] 
Sent: Tuesday, August 05, 2008 10:39 PM
To: Adin, David; LandSpeed List
Cc: panteras
Subject: RE: [Land-speed] alum heads on the street

The "under normal operating conditions"-----aplies---GM considers Temps
over 100 degress over 30 days ABNORMAL---then recomend---24 months or
24M whichever occus first!!!!!!!!!


Towing trailers or other severduty---I personally recomend 12- 24M
whichever ocours first   !!!!!!!!!!!!



---- "Adin wrote: 
> http://www.flex-a-lite.com/auto/assets/images/ZincAnode-web.jpg
> 
> Flex-a-lite #32060  from Jegs for $9.
> 
> Prestone Dex-Cool
> 
> I found the following . . . and thus recommend you do your own
research
> and do NOT mix!
> 
> The first one is obviously for late model GM cars and light duty
trucks.
> The second covers the rest of the field, including cars and diesel
> powered vehicles. Note that the latter will cost about a buck a gallon
> more than the traditional green product.
> 
> Background and reasons for our recommendation. Until 1995 most
> automotive coolants sold in North America were compatible with one
> another. Heavy truck owners were beginning to use some more
> sophisticated technologies, but a lot of those customers were using
the
> same coolant that they had for 20 years! In general, buying quality
> antifreeze and mixing it 50-50 with water was the only requirement.
Big
> truck operators needed supplemental coolant additives (SCAs) to
protect
> diesel engines.
> 
> Oh how the situation has changed! GM cars now use DEX-COOL. Though
still
> an ethylene glycol based coolant, the anti corrosion chemistries are
> dramatically different.
> 
> As a laboratory compatibility test, we intentionally mixed DEX-COOL
with
> a conventional coolant and subjected the mixture to a sample of fresh
> aluminum. The resulting data suggests that aluminum corrodes at an
> accelerated rate when subjected to this mix compared to pure DEX-COOL
or
> pure conventional coolant. As a result, Amalgatech recommends that the
> coolants not be mixed.
> 
> Further, it is our experience that it is best to maintain GM vehicles
> with genuine DEX-COOL through the warranty period of 5 years, 150,000
> miles. After the extended cooling system warranty has expired, the end
> user is on his own anyway, so any quality extended service coolant is
a
> good choice. PEAK(r) and Prestone(r) both have products that are
> available. It's best to stay with extended life coolants in the 1995
and
> newer GM cars.
> 
> Note 1. DEX-COOL was initially dyed orange. In 2000 model year cars,
> most of the GM coolants that we've seen are pink in color. All of the
> aftermarket supply that we've seen so far however, remains orange.
> 
> Note 2. Ford presented a technical paper years ago that concluded that
> the conventional 'green' factory fill coolant that they used was just
as
> durable as carboxylate-inhibited coolants, like DEX-COOL.
Nevertheless,
> Ford and Daimler-Chrysler both appear to be changing to an advanced
> hybrid technology in the 2001 or 2002 model year cars. This coolant is
> easy to identify because it is golden yellow. It offers the same
> extended life benefits as DEX-COOL, but without the compatibility
> questions. Further, it meets the new ASTM D6210 specification so it
can
> be used in diesel trucks.
> 
> Note 3. The diesel engine community has now embraced fully-formulated
> coolant as defined by ASTM D6210. These coolants do not require any
> initial additives, but for diesels they must be supplemented. Most can
> be operated for the life of the engine, using advanced maintenance
> strategies such as the Penray Need-Release(r) or Fleetguard 'ES'(r)
> filter systems.   
> 
> -----Original Message-----
> From: sparky.2211 at cox.net [mailto:sparky.2211 at cox.net] 
> Sent: Tuesday, August 05, 2008 8:18 AM
> To: Adin, David; LandSpeed List
> Cc: panteras
> Subject: Re: [Land-speed] alum heads on the street
> 
> There are anodes that are made to screw into the rad. drain plug
> hole!!!!!!----YES YES YES
> ---- "Adin wrote: 
> > Since my knowledge of chemistry ends with "Salt, its not just for
> > margaritas." I must ask:
> > 
> > 
> > 
> > Alum heads - antifreeze -What should one do to prevent the chemical
> > (galvanic?) action in the cooling system??
> > 
> > 
> > 
> > Is antifreeze enough?  Do I need a sacrificial anode?
> > 
> > 
> > 
>