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ac compressors keep locking up

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johnny
New User

Aug 2, 2010, 1:12 PM

Post #1 of 3 (2515 views)

ac compressors keep locking up	Sign In

1980 camero z28...3 spd auto. 350 engine....rplaced dryer flushed system new oriface tube but still locked four (4) compressors . one remanufactured ...three ac delcos. HELP!!!!!!!

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 2, 2010, 1:43 PM

Post #2 of 3 (2511 views)

Re: ac compressors keep locking up	Sign In

You have something causing high pressure. It could be a restriction in the condenser, the discharge line or the fan not working properly. A/C work is not really a DIY type job for these reasons. Every time a compressor failed, it plugged up the system even more.
Your probably using R134A now and that takes a lot of experience to do correctly and it could still be a problem. The system was engineered for R12.

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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

(This post was edited by Hammer Time on Aug 2, 2010, 1:45 PM)

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Aug 3, 2010, 8:21 AM

Post #3 of 3 (2500 views)

Re: ac compressors keep locking up	Sign In

Arggh! Doesn't take a teaspoon of debris to stop the show. Rebulits are trash IMO.

This car can work fine with 134a just know that it probably wants just 65-70% of any known OE weight of charge. More will stall compressor at about 85%.

134a is fussy to be right on the money. OE mineral oil wont travel with 134a either so Ester or Pag's must be used. Compressors wont last two minutes without oil. Right here is charging procedures that may help........

http://autoforums.carjunky.com/..._A/C_SYSTEMS_P45460/

T

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