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Frequency of Evaporator Core Leak - Late 90's Chevy Tahoe

alchemist_bobtilton on Fri August 01, 2008 2:57 PM User is offline

Year: 1999
Make: Chevy
Model: Tahoe
Engine Size: 5.7L
Refrigerant Type: 134a
Country of Origin: United States

How common is a front evaporator core leak in late 90's Chevrolet SUV's (Tahoe specifically). My friend at work was seeing the classic green oil around the compressor after putting in some dye, but after ordering the compressor, accumulator and o-rings to complete the repair job, a tech here told him he thought he had an evaporator core leak, after using the halide sniffer. I'm wondering about the legitimacy of this claim??

thanks.

Cussboy on Fri August 01, 2008 4:58 PM User is offline

My '94 Sub (R134a) is still on its factory evaporator, condenser, fan, etc. But it has gone through two compressors, never seized, just the compressor body leak. My mode is always "fix first what you KNOW is bad", in your case the compressor body leak

Chick on Fri August 01, 2008 8:04 PM User is offlineView users profile

If he has dye in the system, and it showed the compressor body leaks, have him place a white rag under the evap drain and let it run on outside air, after the rag is soaked, see if UV dye is mixed in with the water, otherwise in my opinion, evap leaks are not common, compressors are.. have him check out the Sanden or Seltec compressors on Ackits.com (I went with the Seltec on mine) and they work flawlessly..If he's using a GM compressor might pay to return it and go with the Sanden or Setec clones..Just my opion though....

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Email: Chick

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HECAT on Sat August 02, 2008 12:32 PM User is offline

Quote
Originally posted by: alchemist_bobtilton
a tech here told him he thought he had an evaporator core leak, after using the halide sniffer. I'm wondering about the legitimacy of this claim?? thanks.

The legitimacy of this claim questions sniffer accuracy or the technicians hearing, values, & motives; and it is not clear if the "common occurrence" in such models is what the technician stated or not. Regardless, it seems from my monitoring of issues, that the most common complaints and conversations regarding evaporator leaks occurs at a much higher frequency with some certain Dodge/Chrysler mini vans and trucks, than with the GM trucks. Regardless, you now have an evaporator leak suspicion (he thinks there is a leak) that has to be confirmed to be true or false with further testing and investigation.

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Edited: Sat August 02, 2008 at 12:32 PM by HECAT

alchemist_bobtilton on Sat August 02, 2008 3:44 PM User is offline

Interestingly, the tech said he was not able to find the leak via the dye test (not sure if he stuck a rag under the evap drain elbow as Chick suggested) or one other way tried. I have a hard time believing this guy.... He went so far as to say that compressor failures weren't that common on these trucks, and he questioned me buying a Shrader valve for the low side port, when I clearly heard a hiss and was unable to stop the leak by unseating and then seating the core.

Cussboy on Sun August 03, 2008 8:04 AM User is offline

Try new AC shop.

alchemist_bobtilton on Tue August 05, 2008 3:43 PM User is offline

...and get this. His price JUST to replace evaporator was $960. Checking baseline time across several mechanics in area (dealers included) is an 8 hour job, give or take an hour. That comes to, on the high side, $640 an hour (with a dealer labor rate of $80 per hour). This guy is smoking something.

Matt L on Tue August 05, 2008 3:58 PM User is offline

Your arithmetic is not correct. $640/hour for 8 hours is $5120.

alchemist_bobtilton on Tue August 05, 2008 8:40 PM User is offline

my bad...I meant, it comes to $640 total (8 hours x $80 per hour a typical dealer 'round here gets).

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