Author Topic: Remove & Clean Orifice Tube  (Read 5350 times)

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Offline Viperpurple

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Remove & Clean Orifice Tube
« on: July 14, 2014, 06:24:49 PM »
Hey,

My air con is not working very well and I got a free efficiency test at a local garage.  They suggested starting by cleaning or replacing the orifice valve.

Can anyone show on a picture where it is and also explain how to remove and clean it, is it right that you can get a special tool or just do it with some thin nose pliers?

I have a Mazda 3 1.6l 2005

Thanks


Adam

Offline Willpower

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Re: Remove & Clean Orifice Tube
« Reply #1 on: July 14, 2014, 08:22:33 PM »
I've looked through all the pages of the workshop manual relating to the Air Con system and can find no reference to anything called an "Orifice Valve" 

Did they give you any further clues ? Because at the moment it smacks of a bit of a leg pull.
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Offline keith h

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Re: Remove & Clean Orifice Tube
« Reply #2 on: July 15, 2014, 06:29:40 PM »
Hi. the orifice valve is the expansion valve in the gas line. Why your local garage has picked on this is rather odd, low gas in the system is the common fault.
Where in the system it is I don't know but briefly but it will be in the liquid line ie liquid refrigerant into the valve, this is controlled by the size of orifice, the liquid expands through the valve back to a gas and has a chilling effect in the evaporator bank. regards keith h

Offline richij101

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Re: Remove & Clean Orifice Tube
« Reply #3 on: July 16, 2014, 08:13:11 AM »
I haven't done much work on car AC systems, but have done work on other AC systems and the concept is very much the same. to replace the expansion valve you would need too evacuate the whole system of refrigerant first then remove and clean the expansion valve (if need be replace). once refitted you will need to pull a vacuum on the system to get rid of all the air thats found its way in side them recharge the system, (Any Air left in will destroy the system).  The expansion valve should be located before the Evaporator as it is what controls the High to low pressure for the refrigeration effect. As Keith H says it expands the liquid back to a gas.

If i was you i would take your car somewhere else to get a second opinion.   
No point in doing half a job, it will only get you half way home.

Offline keith h

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Re: Remove & Clean Orifice Tube
« Reply #4 on: July 16, 2014, 10:27:23 AM »
Well said. As you say Richi, take it to another garage or to a proper air con company who will test the system thoroughly, regards keith h

Offline Neil P

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Re: Remove & Clean Orifice Tube
« Reply #5 on: July 16, 2014, 07:02:42 PM »
I was across in the USA with work and I found this product called AC Pro, not sure if you can get it here but if you can be warned that you will pay more than the $30 ish that I paid for my can.

It is really easy to do and I have attached a link to a video clip of how to do it using the AC Pro kit.

I think a well know tyre fitting company that are very quick  ;) will do it for about £50.

http://www.youtube.com/watch?v=Wn0C9jPOAAQ

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Offline richij101

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Re: Remove & Clean Orifice Tube
« Reply #6 on: August 06, 2014, 07:11:17 AM »
I have seen this product and i was very tempted in using it but i decided not to use it as it has the possibility to go very wrong. in my view this product is like topping up the oil in your car when it gets low, ok it fine to do it but topping up the oil should replace regular services.   
No point in doing half a job, it will only get you half way home.

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Re: Remove & Clean Orifice Tube
« Reply #6 on: August 06, 2014, 07:11:17 AM »