Miatapower List Archive

This read-only message was archived from a public mail list.
Mail From: (email redacted)

I'm one of those that checks fluids weekly even though the levels usually
don't change. This week, however, I discovered to my dismay that the coolant
overflow bottle is empty and the rad is low. Not sure how much, bit I think I
added a quart or better to the rad and then filled the overflow bottle as well.

Question is, where did it go? I've never had coolant "leakage" under the
car, no visible leaks under the hood. Hoses, rad, etc., all look normal. "Temp
gauge" never moved of the center default. We did have some high temps last week
in the 105F+ range, but Sleepy never missed a beat. If the problem is a weak
cap, shouldn't the overflow bottle have been full and not empty?

I'll be checking it everyday until my confidence is restored... Thanks for
any/all ideas.

Jim in Tucson

This read-only message was archived from a public mail list.
Mail From: "Bill Cardell" <(email redacted)>

If enough pumps by the cap to overflow the overflow bottle while you're
driving, it won't have enough to refill the rad when it cools. Test the
cap first. Temp gauge starts to move off center at 110C, at least in our
'99. I've gone to 24 psi caps to keep the coolant in on the track in
these high temps.
=20
Bill Cardell
TurboDog's Dad
Flyin' Miata
1-800-FLY-MX5S
www.flyinmiata.com
=20

________________________________

From: (email redacted) [mailto:(email redacted)]=20
Sent: Sunday, July 16, 2006 10:36 PM
To: (email redacted)
Subject: Coolant question


I'm one of those that checks fluids weekly even though the levels
usually don't change. This week, however, I discovered to my dismay that
the coolant overflow bottle is empty and the rad is low. Not sure how
much, bit I think I added a quart or better to the rad and then filled
the overflow bottle as well.
=20
Question is, where did it go? I've never had coolant "leakage" under the
car, no visible leaks under the hood. Hoses, rad, etc., all look normal.
"Temp gauge" never moved of the center default. We did have some high
temps last week in the 105F+ range, but Sleepy never missed a beat. If
the problem is a weak cap, shouldn't the overflow bottle have been full
and not empty?=20
=20
I'll be checking it everyday until my confidence is restored... Thanks
for any/all ideas.
=20
Jim in Tucson
=20

This read-only message was archived from a public mail list.
Mail From: Robert McElwee <(email redacted)>

I ran my car for a couple of years without a coolant bottle. The radiator a=
lways stayed around 1 inch below full. If I filled it up, it would overflow=
when warm. I could add (just a guess, can't really remember) 1 liter of wa=
ter and the radiator would be full. You could do this every day OR just ign=
ore it and the radiator would stay just slightly low (1 inch?).

So, I guess I am saying that if you overflow past the cap it will not take =
your radiator below a certain level. After that, you never lose any further=
water due to expansion. So, check to see how much it takes to fill your ra=
diator. If it never goes below a certain level (say 1 inch) then you are lo=
sing water due to expansion. If it goes lower than that you have an externa=
l/internal leak.


----- Original Message -----=20
From: Bill Cardell=20
To: (email redacted) ; (email redacted)=20
Sent: Monday, July 17, 2006 12:49 AM
Subject: RE: Coolant question


If enough pumps by the cap to overflow the overflow bottle while you're d=
riving, it won't have enough to refill the rad when it cools. Test the cap =
first. Temp gauge starts to move off center at 110C, at least in our '99. I=
've gone to 24 psi caps to keep the coolant in on the track in these high t=
emps.

Bill Cardell
TurboDog's Dad
Flyin' Miata
1-800-FLY-MX5S
www.flyinmiata.com




---------------------------------------------------------------------------=
---
From: (email redacted) [mailto:(email redacted)]=20
Sent: Sunday, July 16, 2006 10:36 PM
To: (email redacted)
Subject: Coolant question


I'm one of those that checks fluids weekly even though the levels usually=
don't change. This week, however, I discovered to my dismay that the coola=
nt overflow bottle is empty and the rad is low. Not sure how much, bit I th=
ink I added a quart or better to the rad and then filled the overflow bottl=
e as well.

Question is, where did it go? I've never had coolant "leakage" under the =
car, no visible leaks under the hood. Hoses, rad, etc., all look normal. "T=
emp gauge" never moved of the center default. We did have some high temps l=
ast week in the 105F+ range, but Sleepy never missed a beat. If the problem=
is a weak cap, shouldn't the overflow bottle have been full and not empty?=
=20

I'll be checking it everyday until my confidence is restored... Thanks fo=
r any/all ideas.

Jim in Tucson

This read-only message was archived from a public mail list.
Mail From: (email redacted)


24 psi cap ??? ... does that put more pressure on things that should not see
that much pressure? I guess hoses would be the weak link, if there is one.
So if hoses are in good shape 24 psi is considered "safe"?

Jim


In a message dated 7/16/2006 9:49:40 P.M. US Mountain Standard Time,
(email redacted) writes:

If enough pumps by the cap to overflow the overflow bottle while you're
driving, it won't have enough to refill the rad when it cools. Test the cap
first. Temp gauge starts to move off center at 110C, at least in our '99. I've
gone to 24 psi caps to keep the coolant in on the track in these high temps.

Bill Cardell
TurboDog's Dad
Flyin' Miata
1-800-FLY-MX5S
www.flyinmiata.com



____________________________________
From: (email redacted) [mailto:(email redacted)]
Sent: Sunday, July 16, 2006 10:36 PM
To: (email redacted)
Subject: Coolant question



I'm one of those that checks fluids weekly even though the levels usually
don't change. This week, however, I discovered to my dismay that the coolant
overflow bottle is empty and the rad is low. Not sure how much, bit I think I
added a quart or better to the rad and then filled the overflow bottle as well.

Question is, where did it go? I've never had coolant "leakage" under the
car, no visible leaks under the hood. Hoses, rad, etc., all look normal. "Temp
gauge" never moved of the center default. We did have some high temps last
week in the 105F+ range, but Sleepy never missed a beat. If the problem is a
weak cap, shouldn't the overflow bottle have been full and not empty?

I'll be checking it everyday until my confidence is restored... Thanks for
any/all ideas.

Jim in Tucson

This read-only message was archived from a public mail list.
Mail From: Jason C <(email redacted)>

That's one advantage of Evans coolant - 5psi cap is
plenty, never any Mr. Coffee sounds at hot shutdown.

--- (email redacted) wrote:

>
> 24 psi cap ??? ... does that put more pressure on
> things that should not see
> that much pressure? I guess hoses would be the weak
> link, if there is one.
> So if hoses are in good shape 24 psi is considered
> "safe"?
>
> Jim
>
>
> In a message dated 7/16/2006 9:49:40 P.M. US
> Mountain Standard Time,
> (email redacted) writes:
>
> If enough pumps by the cap to overflow the overflow
> bottle while you're
> driving, it won't have enough to refill the rad
> when it cools. Test the cap
> first. Temp gauge starts to move off center at
> 110C, at least in our '99. I've
> gone to 24 psi caps to keep the coolant in on the
> track in these high temps.
>
> Bill Cardell
> TurboDog's Dad
> Flyin' Miata
> 1-800-FLY-MX5S
> www.flyinmiata.com
>
>
>
> ____________________________________
> From: (email redacted) [mailto:(email redacted)]
>
> Sent: Sunday, July 16, 2006 10:36 PM
> To: (email redacted)
> Subject: Coolant question
>
>
>
> I'm one of those that checks fluids weekly even
> though the levels usually
> don't change. This week, however, I discovered to my
> dismay that the coolant
> overflow bottle is empty and the rad is low. Not
> sure how much, bit I think I
> added a quart or better to the rad and then filled
> the overflow bottle as well.
>
> Question is, where did it go? I've never had coolant
> "leakage" under the
> car, no visible leaks under the hood. Hoses, rad,
> etc., all look normal. "Temp
> gauge" never moved of the center default. We did
> have some high temps last
> week in the 105F+ range, but Sleepy never missed a
> beat. If the problem is a
> weak cap, shouldn't the overflow bottle have been
> full and not empty?
>
> I'll be checking it everyday until my confidence is
> restored... Thanks for
> any/all ideas.
>
> Jim in Tucson
>
>
>
>
>
>

This read-only message was archived from a public mail list.
Mail From: "Jeff Abrams" <(email redacted)>

The "24" PSI cap is 10 PSI over atmo. That is referred to as a 1.7 bar cap.
A "5" PSI cap is a 20 PSI cap. That is a 1.3 bar cap
They really aren't that far apart.
A 1.9 bar cap is the most you should ever contemplate with normal (or even
silicone) hoses.
At 1.9 bar, straight water boils at 245°F. At 1.3 bar it is 224°F.
Your call.

---
Jeff Abrams
(email redacted)

TURBOCHARGED & INTERCOOLED 2004 Mazda RX-8 GT
naturallyaspiratedHOTTNESS 2003 Mazda MX-5 Miata
TURBOCHARGED & INTERCOOLED 1997 Mazda MX-5 Miata <=SOLD
TURBOCHARGED & INTERCOOLED 1993 Mazda MX-3 GS <=SOLD


If women can have PMS, then men can have ESPN.




-----Original Message-----
From: Jason C [mailto:(email redacted)]
Sent: Sunday, July 16, 2006 11:04 PM
To: (email redacted); (email redacted); (email redacted)
Subject: Re: Coolant question


That's one advantage of Evans coolant - 5psi cap is
plenty, never any Mr. Coffee sounds at hot shutdown.

--- (email redacted) wrote:

>
> 24 psi cap ??? ... does that put more pressure on
> things that should not see
> that much pressure? I guess hoses would be the weak
> link, if there is one.
> So if hoses are in good shape 24 psi is considered
> "safe"?
>
> Jim
>
>
> In a message dated 7/16/2006 9:49:40 P.M. US
> Mountain Standard Time,
> (email redacted) writes:
>
> If enough pumps by the cap to overflow the overflow
> bottle while you're
> driving, it won't have enough to refill the rad
> when it cools. Test the cap
> first. Temp gauge starts to move off center at
> 110C, at least in our '99. I've
> gone to 24 psi caps to keep the coolant in on the
> track in these high temps.
>
> Bill Cardell
> TurboDog's Dad
> Flyin' Miata
> 1-800-FLY-MX5S
> www.flyinmiata.com
>
>
>
> ____________________________________
> From: (email redacted) [mailto:(email redacted)]
>
> Sent: Sunday, July 16, 2006 10:36 PM
> To: (email redacted)
> Subject: Coolant question
>
>
>
> I'm one of those that checks fluids weekly even
> though the levels usually
> don't change. This week, however, I discovered to my
> dismay that the coolant
> overflow bottle is empty and the rad is low. Not
> sure how much, bit I think I
> added a quart or better to the rad and then filled
> the overflow bottle as well.
>
> Question is, where did it go? I've never had coolant
> "leakage" under the
> car, no visible leaks under the hood. Hoses, rad,
> etc., all look normal. "Temp
> gauge" never moved of the center default. We did
> have some high temps last
> week in the 105F+ range, but Sleepy never missed a
> beat. If the problem is a
> weak cap, shouldn't the overflow bottle have been
> full and not empty?
>
> I'll be checking it everyday until my confidence is
> restored... Thanks for
> any/all ideas.
>
> Jim in Tucson
>
>
>
>
>
>

This read-only message was archived from a public mail list.
Mail From: "Simon Whitworth" <(email redacted)>

On 7/16/06, Jason C <(email redacted)> wrote:
> That's one advantage of Evans coolant - 5psi cap is
> plenty, never any Mr. Coffee sounds at hot shutdown.

Do you need a special rad and water pump to run Evans coolant ?

Simon.

This read-only message was archived from a public mail list.
Mail From: "Abraham Mara" <(email redacted)>

Jeff, not quite sure I agree with you - at least in terms of "things seeing
pressure" that don't normally. While the boiling points might be based off
absolute pressure, the force on the hoses will the the differential across
the hose: assuming a 24 psi cap is 24 absolute, you have twice the pressure
on the hoses that you would with a 5.

Is that really how they are rated, btw? I know 14 lb caps are 14 OVER
ambient, if not, they'd need a half pound spring holding them open.
----- Original Message -----
From: "Jeff Abrams" <(email redacted)>
> The "24" PSI cap is 10 PSI over atmo. That is referred to as a 1.7 bar
> cap.
> A "5" PSI cap is a 20 PSI cap. That is a 1.3 bar cap
> They really aren't that far apart.
> A 1.9 bar cap is the most you should ever contemplate with normal (or even
> silicone) hoses.
> At 1.9 bar, straight water boils at 245°F. At 1.3 bar it is 224°F.
> Your call.
>
> ---
> Jeff Abrams
> (email redacted)
>
> TURBOCHARGED & INTERCOOLED 2004 Mazda RX-8 GT
> naturallyaspiratedHOTTNESS 2003 Mazda MX-5 Miata
> TURBOCHARGED & INTERCOOLED 1997 Mazda MX-5 Miata <=SOLD
> TURBOCHARGED & INTERCOOLED 1993 Mazda MX-3 GS <=SOLD
>
>
> If women can have PMS, then men can have ESPN.
>
>
>
>
> -----Original Message-----
> From: Jason C [mailto:(email redacted)]
> Sent: Sunday, July 16, 2006 11:04 PM
> To: (email redacted); (email redacted); (email redacted)
> Subject: Re: Coolant question
>
>
> That's one advantage of Evans coolant - 5psi cap is
> plenty, never any Mr. Coffee sounds at hot shutdown.
>
> --- (email redacted) wrote:
>
>>
>> 24 psi cap ??? ... does that put more pressure on
>> things that should not see
>> that much pressure? I guess hoses would be the weak
>> link, if there is one.
>> So if hoses are in good shape 24 psi is considered
>> "safe"?
>>
>> Jim
>>
>>
>> In a message dated 7/16/2006 9:49:40 P.M. US
>> Mountain Standard Time,
>> (email redacted) writes:
>>
>> If enough pumps by the cap to overflow the overflow
>> bottle while you're
>> driving, it won't have enough to refill the rad
>> when it cools. Test the cap
>> first. Temp gauge starts to move off center at
>> 110C, at least in our '99. I've
>> gone to 24 psi caps to keep the coolant in on the
>> track in these high temps.
>>
>> Bill Cardell
>> TurboDog's Dad
>> Flyin' Miata
>> 1-800-FLY-MX5S
>> www.flyinmiata.com
>>
>>
>>
>> ____________________________________
>> From: (email redacted) [mailto:(email redacted)]
>>
>> Sent: Sunday, July 16, 2006 10:36 PM
>> To: (email redacted)
>> Subject: Coolant question
>>
>>
>>
>> I'm one of those that checks fluids weekly even
>> though the levels usually
>> don't change. This week, however, I discovered to my
>> dismay that the coolant
>> overflow bottle is empty and the rad is low. Not
>> sure how much, bit I think I
>> added a quart or better to the rad and then filled
>> the overflow bottle as well.
>>
>> Question is, where did it go? I've never had coolant
>> "leakage" under the
>> car, no visible leaks under the hood. Hoses, rad,
>> etc., all look normal. "Temp
>> gauge" never moved of the center default. We did
>> have some high temps last
>> week in the 105F+ range, but Sleepy never missed a
>> beat. If the problem is a
>> weak cap, shouldn't the overflow bottle have been
>> full and not empty?
>>
>> I'll be checking it everyday until my confidence is
>> restored... Thanks for
>> any/all ideas.
>>
>> Jim in Tucson
>>
>>
>>
>>
>>
>>
>
>
>
>