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Old 12-10-2017   #21
Dynomite
 
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Default Re: Coolant Recommedation
Quote:
Originally Posted by Marc Haibeck View Post
Here's an update about green formula coolant availability. I believe that it is still important to stay with the OE type color coded green coolant. Green coolant can be hard to find. Some auto supplies will try to sell "universal" or some other coolant because that is all they have. It might take some searching but green coolant is still available.

As of this date AutoZone has it in their house brand. Part number A003.

NAPA has it in their house brand. Part number NAF1GAL. The NAPA near me also has the Zerex brand. Part number ZRX ZX001.

A local independent auto supply stocks it because they want to support the classic car market. It's labeled FVP Original Green Formula. Part number FVPGreen-Gal. It's distributed by FVPparts.com.
RADIATOR COOLANT additional photos of Marc's recommendations
You want to only use the green coolant. They have it at Napa and it meets 1825M GM Spec.

For Zerex the first gallon is called Regular Green Coolant (GM 1825M), the second gallon is called Original Formula (GM 1825M). Zerex ZXRU1 is 50-50 and Zerex ZX001 is undiluted. The third gallon is NAPA coolant (GM 1825M).

OROR

NAPA
Last edited by Dynomite; 12-10-2017 at 02:28 PM.
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Old 12-10-2017   #22
Jagdpanzer
 
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Default Re: Coolant Recommedation
Marc,
Thanks for updating us.
Besides the OEM head gasket in your experience have you seen any other area of the LT5 engine that is negatively effected by not using the recommended 1825M type antifreeze?
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Old 12-17-2017   #23
Marc Haibeck
 
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Default Re: Coolant Recommedation
I have not noticed any other particular corrosion problems Phil.
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Old 02-05-2018   #24
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Default Re: Coolant Recommedation
All,

Was just at Autozone. Part # 540722 now has code AZA003 on it. Green conventional. It looks to be the correct product.

Marc, can you confirm that the AZA003 is still the correct coolant?

Thanks

Quote:
Originally Posted by Marc Haibeck View Post
Here's an update about green formula coolant availability. I believe that it is still important to stay with the OE type color coded green coolant. Green coolant can be hard to find. Some auto supplies will try to sell "universal" or some other coolant because that is all they have. It might take some searching but green coolant is still available.

As of this date AutoZone has it in their house brand. Part number A003.

NAPA has it in their house brand. Part number NAF1GAL. The NAPA near me also has the Zerex brand. Part number ZRX ZX001.

A local independent auto supply stocks it because they want to support the classic car market. It's labeled FVP Original Green Formula. Part number FVPGreen-Gal. It's distributed by FVPparts.com.
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Old 02-05-2018   #25
HAWAIIZR-1
 
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Default Coolant Recommedation
I could not find GM 1825M in Japan, not even on military bases since they only carry Prestone. I almost settled for Prestone, but after consulting with Marc, I kept searchIng the inter web. Fortunately, Advance Auto Parts could ship Carquest Conventional Green stuff to me and it’s on the way. [Thank you Marc! ATTACH]7016[/ATTACH]


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Last edited by HAWAIIZR-1; 02-05-2018 at 04:07 PM.
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Old 02-07-2018   #26
Marc Haibeck
 
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Default Re: Coolant Recommedation
I think that the AutoZone AZA003 is a good choice.
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Old 10-31-2018   #27
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Default Re: Coolant Recommedation
Buy premixed? Or 50/50 myself?
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Old 10-31-2018   #28
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Default Re: Coolant Recommedation
Quote:
Originally Posted by jpalmer1717 View Post
Buy premixed? Or 50/50 myself?
Premix is just easier. Makes no difference.
H
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Old 09-17-2019   #29
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Default Re: Coolant Recommedation
Hi guys,
i'm from italy and i cant find your product. Do you think that a common green coolant is good for my lt5?
How many liters need?
Thanks
Last edited by max76; 09-17-2019 at 04:18 AM.
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Old 09-17-2019   #30
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Default Re: Coolant Recommedation
http://www.zr1.net/forum/showthread.php?t=21601

15 quarts or 14.2 liters

http://www.zr1specialist.com/HAT%20W...%20Coolant.pdf




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