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Slow R134a leak

540itouring on Wed May 27, 2009 5:24 PM User is offline

Year: 1996
Make: Toyota
Model: Previa
Engine Size: 2.4
Refrigerant Type: R134a
Country of Origin: United Kingdom

Hi , i have a slow leak on 1996 toyota previa and lasted 18 months after replacing a faulty condenser. The system worked well but now tested the system and is empty. I chaged the system with OFN and watched the pointer drop after about 15 minutes had dropped about 1mm at the tip of the pointer. I have just got some leak detector foam spray and plan to spray this on the joints at the weekend and hope to find the leak. The condenser i am sure will be ok but can not see any sign of a oil patch any where and the system also had dye put in last time. I have had a quick look with a UV lamp but found nothing so far. Does any one have some fault fingind tips ? I think the evaporator looks like you get to it from the engine bay and not a dash out job but not sure.

Can you test a compressor front seal with leak sealer spray or is it only with r134 and a sniffer detector ? I also have a sniffer but did not want to waste any r134 when it is cheaper and safer to use OFN. If it is the compressor seal are they easy to replace ? Do evaporators leak often ?

Thanks for your help in advance

Any help please

Chick on Wed May 27, 2009 6:34 PM User is offlineView users profile

You can pull the front hub off the compressor and look with a UV light for oil or signs of dye.. A slow leak doesn't always push the dye out though. sometimes a good leak detector is best.. But oily spots inside the compressor nose is a give away... hope this helps.

Email: Chick


Freedoms just another word for nothing left to lose

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