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Discussion Starter #1
I own a 2004 Lexus LS430 with 36000 miles, 37 months since new. I looked in
the book but there is ZERO mention of when to change the coolant. I posted
on the Lexus newgroup but still didn't get an answer. Do any of you know
when Toyota/Lexus recommends changing the coolant in my car?
 
M

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Discussion Starter #2
There may be a separate maintenance schedule book listing the official
recommendation, but I would say IT'S TIME. Every 2 years is a good
rule of thumb, and be sure whoever does it uses Toyota coolant.


D.D. Palmer wrote:
> I own a 2004 Lexus LS430 with 36000 miles, 37 months since new. I looked in
> the book but there is ZERO mention of when to change the coolant. I posted
> on the Lexus newgroup but still didn't get an answer. Do any of you know
> when Toyota/Lexus recommends changing the coolant in my car?
 
D

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Discussion Starter #3
There IS a separate maintenance booklet that tells you when to do everything
under the sun...except change the coolant.


"Mark" <[email protected]> wrote in message
news:[email protected]
> There may be a separate maintenance schedule book listing the official
> recommendation, but I would say IT'S TIME. Every 2 years is a good
> rule of thumb, and be sure whoever does it uses Toyota coolant.
>
>
> D.D. Palmer wrote:
>> I own a 2004 Lexus LS430 with 36000 miles, 37 months since new. I looked
>> in
>> the book but there is ZERO mention of when to change the coolant. I
>> posted
>> on the Lexus newgroup but still didn't get an answer. Do any of you know
>> when Toyota/Lexus recommends changing the coolant in my car?

>
 
J
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Discussion Starter #4
The 04 should be getting the prediluted Pink coolant. It uses one of GM
Dexcool's rust inhibitor but without the other 2-ethylhexane acid
(2EHA) that can eat some types of gaskets. 2EHA is fast acting (and
also a platicizer) where as the other Dexcool component (sebacate) is
slow acting and takes several thousand miles to become effective.

But the phosphates Toyota used in place of 2EHA don't do a good job and
industry tests have shown "high weight loss" (corrosion) in systems
using Toyota Pink. Normally you shouldn't lose more than 1mg/cm^2/week,
but I think the Pink losses 20-30+ mg.

Other than that it's like Dexcool, supposed to be 5/150 under ideal
laboratory conditions. So probably 3 years or 45K miles in the real
world. Lexus will probably charge you an arm and a leg for the change,
but it's about $14/gallon/coupon at Toyota dealers for home mechanics.


D.D. Palmer wrote:
> I own a 2004 Lexus LS430 with 36000 miles, 37 months since new. I looked in
> the book but there is ZERO mention of when to change the coolant. I posted
> on the Lexus newgroup but still didn't get an answer. Do any of you know
> when Toyota/Lexus recommends changing the coolant in my car?
 
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