Thermostat

[A26B]

Originally Posted by XfireZ51

I bought a thermo from Jerry just to avoid any "agida" later on.

Grazie Dom! That's the best compliment one could ask for!

[Livin' in the 80's]

Originally Posted by A26B

Grazie Dom! That's the best compliment one could ask for!

Just ordered the correct one from Jerry's Thanks Jerry

[Livin' in the 80's]

Originally Posted by HAWAIIZR-1

All I could find here in Japan at the Navy base Autoport are these:



None of them state GM 1825M. I'll have to check manufacturer's website for more details.


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I just emailed Stephen Woodward at Prestone and asked if it meets the GM spec.

[Livin' in the 80's]

Originally Posted by Livin' in the 80's

I just emailed Stephen Woodward at Prestone and asked if it meets the GM spec.

Here is a frequently asked questions section at Prestone http://ca.prestone.com/enca/learn_mo...sked_questions


Q:
What automobile industry specifications do your antifreezes meet or exceed?
A:
Prestone® Antifreeze/Coolant meets or exceeds the performance requirements of the following specifications:
ASTM D3306
SAE J1034
GM 1825M
Ford ESE M97B44-A
Chrysler MS7170
General Services Administration CID A-A-52624

[Livin' in the 80's]

Originally Posted by Livin' in the 80's

Here is a frequently asked questions section at Prestone http://ca.prestone.com/enca/learn_mo...sked_questions


Q:
What automobile industry specifications do your antifreezes meet or exceed?
A:
Prestone® Antifreeze/Coolant meets or exceeds the performance requirements of the following specifications:
ASTM D3306
SAE J1034
GM 1825M
Ford ESE M97B44-A
Chrysler MS7170
General Services Administration CID A-A-52624

This is the Canadian Q&A. The US Q&A section doesn't show this. Will wait to hear from Prestone.

[XfireZ51]

Originally Posted by Livin' in the 80's

I just emailed Stephen Woodward at Prestone and asked if it meets the GM spec.

Both of those have been in my coolong system with no issues.

[HAWAIIZR-1]

Originally Posted by Livin' in the 80's

I just emailed Stephen Woodward at Prestone and asked if it meets the GM spec.

Thanks. I was going to do the same when I researched Prestone of Q&As this AM to be sure. Not sure why they don't list it on the container. Doing a search on Peak website only one of their products is indicated with GM 1825M spec for our cars called Ready Use Green.


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[HAWAIIZR-1]

Originally Posted by XfireZ51

Both of those have been in my coolong system with no issues.

Thanks for confirming. I know I used standard Prestone before in the past. It might be my only choice here.


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[Livin' in the 80's]

Originally Posted by Dynomite

Initial fill is 18 quarts but on refill depending on how much you drain two gallons or less should be close.


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So, 2 gallons of concentrate and a total or 4 gallons mixed.

[Dynomite]

Originally Posted by Livin' in the 80's

So, 2 gallons of concentrate and a total or 4 gallons mixed.

Depends on how much you drained......and depends on the concentration before and the concentration you now want (Low Temperature Protection).

I usually go for -20 deg more or less with Zs not driven in winter but under cover in shed/garage. If you are in warmer climate you may go a bit less antifreeze but anti freeze also does serve multiple purposes (anti rust, raises boiling temperature) in addition to obvious protection from freezing temperatures. I usually will refill with a gallon or a bit more of antifreeze and about gallon or bit less distilled water then top off white plastic overflow container under passenger headlight with pure antifreeze within an inch or two of top of that plastic reservoir. This is if you only removed a bit of coolant for Plenum Removal...I have TB coolant blocked so do not have to remove any coolant for Plenum removal.

Which white plastic reservoir I check after each of two or three heating cycles to make sure it is still topped off. I check before and after refilling/re-filling with 5 ball tester (I recall) and shoot for 3-1/2 balls floating (that is 3 balls floating and the 4th ball in suspension).

3 balls floating.......-10 deg F and +261 deg F
4 balls floating.......-25 deg F and +266 deg F

Now if you drained more coolant as in replaced water pump and radiator.....use more than 2 gallons approaching 3-1/2 gallons coolant more or less. If you removed engine and are now replacing coolant......use more than 3 gallons.....maybe approaching 4 gallons more or less of coolant. but do remember to go through several heating cycles after coolant replacement to top off with in 2 inches of top of that plastic coolant overflow under passenger headlight. You fill the coolant using the Top Black Reservoir just in front of the passenger side windshield under the hood.
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