Honda Car Forum

How do you tell if the air co has enough R134a,or needs filling,and how do
you tell if it's full or too full?

--
Jim Yanik
jyanik-at-kua.net

On Tue, 6 Jul 2004 14:52:22 +0000 (UTC), Jim Yanik <jyanik@abuse.gov>
wrote:

>How do you tell if the air co has enough R134a,or needs filling,and how do
>you tell if it's full or too full?

With a R-134 gauge set and thermometer.

Rule of thumb: Pressures should be around double ambient temp +/- 20
on the high side and half ambient +/-20 on the low side.

So on a 100 degree day

30 psi Low Side
220 psi High Side

would be about normal.. There may be specs in your car's service
manual. There are specs for the amount of refrigerant it takes, on
the car.

Lets say you get 20 degrees out of the dash vent and then add 134 and
the temp coming out of the dash gets higher, you have overfilled. So,
add carefully..

However, if your a/c isn't working correctly, you may have a leak or
some other issue that needs to be corrected.

__________________
Note: To reply, replace the word 'spam' embedded in return address with 'mail'.
N38.6 W121.4

Barry S. <nntp@spamsack.org> wrote in
news:jntpe0tqun1cr9es7h621a67b45urli2g2@4ax.com:

> On Tue, 6 Jul 2004 14:52:22 +0000 (UTC), Jim Yanik <jyanik@abuse.gov>
> wrote:
>
>>How do you tell if the air co has enough R134a,or needs filling,and
>>how do you tell if it's full or too full?
>
> With a R-134 gauge set and thermometer.
>
> Rule of thumb: Pressures should be around double ambient temp +/- 20
> on the high side and half ambient +/-20 on the low side.
>
> So on a 100 degree day
>
> 30 psi Low Side
> 220 psi High Side
>
> would be about normal.. There may be specs in your car's service
> manual. There are specs for the amount of refrigerant it takes, on
> the car.
>
> Lets say you get 20 degrees out of the dash vent and then add 134 and
> the temp coming out of the dash gets higher, you have overfilled. So,
> add carefully..
>
> However, if your a/c isn't working correctly, you may have a leak or
> some other issue that needs to be corrected.
>
> __________________
> Note: To reply, replace the word 'spam' embedded in return address
> with 'mail'. N38.6 W121.4
>

Thanks,I went to Wal-Mart,and they sell sets with a gauge and a cyl of R-
134a.My GSR is 11 years old,and needed a bit of "topping off".


--
Jim Yanik
jyanik-at-kua.net

On 7/8/04 8:45 AM, in article Xns9520636AA77A0jyanikkuanet@204.117.192.21,
"Jim Yanik" <jyanik@abuse.gov> wrote:

> Barry S. <nntp@spamsack.org> wrote in
> news:jntpe0tqun1cr9es7h621a67b45urli2g2@4ax.com:
>
>> On Tue, 6 Jul 2004 14:52:22 +0000 (UTC), Jim Yanik <jyanik@abuse.gov>
>> wrote:
>>
>>> How do you tell if the air co has enough R134a,or needs filling,and
>>> how do you tell if it's full or too full?
>>
>> With a R-134 gauge set and thermometer.
>>
>> Rule of thumb: Pressures should be around double ambient temp +/- 20
>> on the high side and half ambient +/-20 on the low side.
>>
>> So on a 100 degree day
>>
>> 30 psi Low Side
>> 220 psi High Side
>>
>> would be about normal.. There may be specs in your car's service
>> manual. There are specs for the amount of refrigerant it takes, on
>> the car.
>>
>> Lets say you get 20 degrees out of the dash vent and then add 134 and
>> the temp coming out of the dash gets higher, you have overfilled. So,
>> add carefully..
>>
>> However, if your a/c isn't working correctly, you may have a leak or
>> some other issue that needs to be corrected.
>>
>> __________________
>> Note: To reply, replace the word 'spam' embedded in return address
>> with 'mail'. N38.6 W121.4
>>
>
> Thanks,I went to Wal-Mart,and they sell sets with a gauge and a cyl of R-
> 134a.My GSR is 11 years old,and needed a bit of "topping off".
>

If its 11 years old, doesn't it use R-12?

"E. Meyer" <e52.meyer0SPAM@ieee.org> wrote in
news:BD1408F4.8AAF5%e52.meyer0SPAM@ieee.org:

> On 7/8/04 8:45 AM, in article
> Xns9520636AA77A0jyanikkuanet@204.117.192.21, "Jim Yanik"
> <jyanik@abuse.gov> wrote:
>
>> Barry S. <nntp@spamsack.org> wrote in
>> news:jntpe0tqun1cr9es7h621a67b45urli2g2@4ax.com:
>>
>>> On Tue, 6 Jul 2004 14:52:22 +0000 (UTC), Jim Yanik
>>> <jyanik@abuse.gov> wrote:
>>>
>>>> How do you tell if the air co has enough R134a,or needs filling,and
>>>> how do you tell if it's full or too full?
>>>
>>> With a R-134 gauge set and thermometer.
>>>
>>> Rule of thumb: Pressures should be around double ambient temp +/- 20
>>> on the high side and half ambient +/-20 on the low side.
>>>
>>> So on a 100 degree day
>>>
>>> 30 psi Low Side
>>> 220 psi High Side
>>>
>>> would be about normal.. There may be specs in your car's service
>>> manual. There are specs for the amount of refrigerant it takes, on
>>> the car.
>>>
>>> Lets say you get 20 degrees out of the dash vent and then add 134
>>> and the temp coming out of the dash gets higher, you have
>>> overfilled. So, add carefully..
>>>
>>> However, if your a/c isn't working correctly, you may have a leak or
>>> some other issue that needs to be corrected.
>>>
>>> __________________
>>> Note: To reply, replace the word 'spam' embedded in return address
>>> with 'mail'. N38.6 W121.4
>>>
>>
>> Thanks,I went to Wal-Mart,and they sell sets with a gauge and a cyl
>> of R- 134a.My GSR is 11 years old,and needed a bit of "topping off".
>>
>
> If its 11 years old, doesn't it use R-12?
>
>
>

It's a 94 GSR,but I took delivery of it in late 93.
It's clearly R134a,says so in the owners manual.

--
Jim Yanik
jyanik-at-kua.net

Also, some Honda vehicles switched to R134a in 93, not 94. The Prelude,
NSX, and Legend all had R134a for the 1993 model year.

>
> It's a 94 GSR,but I took delivery of it in late 93.
> It's clearly R134a,says so in the owners manual.
>