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Why HOAT? The PT radiator coolant thread...

 
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Old 22 Apr 2012, 09:42 pm
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Default Re: Why HOAT? The PT radiator coolant thread...

FYI:
I was stationed at Comiso air station on Sicily 84-85 for the air force
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Old 23 Apr 2012, 12:01 am
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Default Re: Why HOAT? The PT radiator coolant thread...

No, no no... there are many other HOAT antifreezes out there. I'm just displaying one type here. The reason behind this post is to help others stay with HOAT. You can find HOAT at many auto parts stores. Just make sure it really is HOAT, and NOT OAT.
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Old 23 Apr 2012, 08:00 pm
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Default Re: Why HOAT? The PT radiator coolant thread...

Quote:
Originally Posted by Samson View Post
So that is the only HOAT made, the zerex G-05?
I see the chart says "not recommended" for Asian vehicles. So I shouldnt use it at all in my 2005 Miata?
Thank you very much for the information.

The Zerex and the MOPAR coolant are the only two HOAT coolants that I'm aware of...
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Old 24 Apr 2012, 10:48 am
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Default Re: Why HOAT? The PT radiator coolant thread...

Quote:
Originally Posted by rcktpwrd View Post
The Zerex and the MOPAR coolant are the only two HOAT coolants that I'm aware of...

Actually, Ford has been using a HOAT formula since 2002. There have been several others out there for about that same length of time.

1. Arctic blend G-Plus-------------------------------------Yellow
2. Daimler/Chrysler Mopar----------------------------------orange
3. Valvoline Zerex G-05------------------------------------yellow
4. Ford Motorcraft Premium Gold---------------------------yellow
5. Peak CF-EXL-------------------------------------------yellow


I've been told that, of course, Mercedes uses a HOAT formula also. Probably a few more out there.

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Old 24 Apr 2012, 11:34 am
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Default Re: Why HOAT? The PT radiator coolant thread...

actually chrysler makes a HOAT but they get like $28 a gallon for it the zerox is pretty much the same just way cheaper
Do most folks use distilled water?????? I never have just wondering
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Old 14 May 2012, 11:28 pm
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Default Re: Why HOAT? The PT radiator coolant thread...

Since I bought my 2001 PT Cruiser, from a Chrysler dealer, can I assume the coolent is HOAT? Also, since the color does not always indicate HOAT, OAT or "Classic", am I reading the information correctly that adding HOAT to OAT or "Classic" is fine. ? I need to top off the fluid and really want to be sure to add the correct one. Thanks!
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Old 15 May 2012, 10:39 am
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Default Re: Why HOAT? The PT radiator coolant thread...

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Originally Posted by MaddogCT View Post
Since I bought my 2001 PT Cruiser, from a Chrysler dealer, can I assume the coolent is HOAT? Also, since the color does not always indicate HOAT, OAT or "Classic", am I reading the information correctly that adding HOAT to OAT or "Classic" is fine. ? I need to top off the fluid and really want to be sure to add the correct one. Thanks!
Don't mix different flavors. If you bought it new from them then yes it has hoat. If you bought it used could be any brand.

A start from scratch might be a good way to go.
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Old 15 May 2012, 11:51 am
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Default Re: Why HOAT? The PT radiator coolant thread...

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Originally Posted by cruserdad1976 View Post
Do most folks use distilled water??????
Yes,

I see lots of corrosion on very old cooling systems from this family.
Heads will get holes in them (thankfully between important parts), water connector neck gets pits, and radiators fill.

Would this occur if coolant were changed periodically, with distilled water?
Probably not.
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Old 15 May 2012, 07:13 pm
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Default Re: Why HOAT? The PT radiator coolant thread...

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Originally Posted by UptownSport View Post
Yes,

I see lots of corrosion on very old cooling systems from this family.
Heads will get holes in them (thankfully between important parts), water connector neck gets pits, and radiators fill.

Would this occur if coolant were changed periodically, with distilled water?
Probably not.
First there shouldn't be pitting there, second that means it needs to be shaved and polished before re-installing. Really odd place for pitting to occur.
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Old 15 May 2012, 07:33 pm
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Default Re: Why HOAT? The PT radiator coolant thread...

On my cars which use HOAT, I use the zerex G5 and distilled water.

If you are smart, in the PT, I just drain them every other year, add 1 gallon Zerex G5 and top with 2 1/2 qts distilled water. I have never had any issues with radiators clogging.

I did have to replace the radiator in my 03 GT because it started leaking at the crimp.

At Napa a gallon of zerex is 12$ and a gallon of distilled water from Wally World is 1$.

In my older cars I ran propolene glycol. Amsoil and Safer Lowtox
make that. The advantage with propelene is if you get any in the oil it will not wipe out the bearings but ethelene at like 3% will take out the bearings. A guy at an oil analysis lab told me that years ago.

Quote:
Originally Posted by cruserdad1976 View Post
actually chrysler makes a HOAT but they get like $28 a gallon for it the zerox is pretty much the same just way cheaper
Do most folks use distilled water?????? I never have just wondering
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