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Can't find the leak

mhfd112 on Sat June 23, 2012 11:06 AM User is offline

Year: 2001
Make: Toyota
Model: Sienna XLE
Engine Size: 3.0

I pulled a vacuum on the van and it pulled down quick and held for a while so I charged it. It only lasted about a week. I pulled a vacuum again and put in a can of freon with dye. No longer than the charge lasted I thought the leak would be obvious, but I can't find a leak.

Are there any hard to find places that these vans are prone to leak? It does have rear air.



Dougflas on Sat June 23, 2012 5:20 PM User is offline

check your evap drain tubes. Also, place a plastic bag or shower cao arounbd the compressor and let it sit over night. The place a sniffer in the plastic bag or shower cap.

mhfd112 on Sun June 24, 2012 9:35 AM User is offline

mhfd112 on Sun June 24, 2012 9:40 AM User is offline

I used the detector in the vents front and rear. Stuck it up the rear evaporator drain. I couldn't locate the front drain. Compressor looks dry. Still can't find any evidence of a leak. I know it is there somewhere.

mhfd112 on Thu June 28, 2012 2:10 PM User is offline

Put dye in and ran it for a few days. Only dye I could find was around the service ports. Replaced the valve cores and recharged.

Keeping my fingers crossed!

samson521 on Tue July 03, 2012 5:27 AM User is offline

did you ever find the leak? and how did you fix the a/c

mhfd112 on Fri July 13, 2012 4:43 PM User is offline

The new valve cores stopped the leak.

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