2006 BMW 520i, list 6 crocks of engine continuously, travel makes an appointment with 300 thousand kilometer. According to the car advocate descriptive car air conditioning is not cool, and cold intermediary also had been added last year.
Basic examination platoon consults a project:
- Air conditioning air-blower gives wind force. Air conditioning low pressure is in charge of whether microtherm puts a hand on the ice, can be informed with hand feeling. Condenser is clean, medicinal powder heat is good. Can use head of the machine gun that wash a car to be moved into mist shape perpendicular angle is cleaned. Air conditioning pressure is enough, with air conditioning pressure the watch is measured.
Via examination of fat elder brother, low-pressure pipeline does not have microtherm phenomenon, considering above all is cold intermediary inadequacy.
Maintain measure:
Air conditioning is not cool, pressure detects is the first. Via detecting pressure of cold intermediary of air conditioning pipeline is not worth 10Psi, have pressure hardly. Explain cold intermediary has been divulged entirely, this also is fat elder brother most be afraid of most headache.
Dozen press vacuumize facility.
Reach pressurization of air conditioning pipeline above all 180Psi, always observe pressure expresses numeric change. After half hour, pressure expresses numerical value to make an appointment with 177Psi, reduce 3Psi. Everybody may feel leak is very small, but this is compressor only static condition. If start air conditioning, the high pressure that approach a valve is worth air conditioning to be about between 170~300psi normally, fat elder brother guesses have more than is needed ends with respect to meeting leak between one climate.
Cent of the means that check leakage is a lot of kinds, professional fluorescence tracks an agent to check leakage, major makes appearance of cryogen electron get sth others ignored wait a moment, these high-tech equipment are fat this does not have elder brother, only water of washing powder hubble-bubble.
Air conditioning leak is primary inspect an item:
- Whether be wounded by cobble eyewinker before condenser leak. For the moment is not discharged from the back check. Head of compressor connect, pump, condenser connect, expand connect of a powerful person, include to repair a pipeline. Air conditioning discretion presses gas mouth, include to hit press equipment to also need full inspection.
Pass much person to be checked repeatedly for many times, did not discover leak phenomenon. Next fat elder brother prepare to tear open the fender on next cistern, check in detail further.
Surprise fat elder brother discovered clues, cistern frame bracket has attrition nearly very much with what high pressure leans.
High-pressured tube wall has been ground to make the same score, see less than having basically with naked eye trachoma, but with water of washing powder hubble-bubble, left and right sides of about 3 seconds can blow a small hubble-bubble, observe very difficult also discovery not carefully.
Flat be found, maintenance method cent is two kinds, the first change canal of whole high pressure, the price may be close friends hundreds of. The 2nd look for a master of professional aluminium solder to undertake solder fills. Solder fills car of proposal of fat elder brother advocate tear open come down oneself look for a person go solder, car advocate feel to tear open rise very troublesome, the meaning thinks this end tears open a condenser, pull pipeline next oneself drive go solder fills.
Fat elder brother wants to saying BMW to go only solder fills, the price won't be low. This is the effect after solder fills, attrition is in solder an a knot in one's heart.
After solder is over, continue to hit press a test, hit this press to 200Psi. Waited for 3 hours about, pressure watch shows still is 200psi. Explain the problem already was solved, the job that leave is vacuumize, add cold intermediary. The place that high-pressured pipeline chafes undertakes clearance is adjusted, be in charge of wrap up to rise to go with balata next.
Fat elder brother sums up: Cold intermediary is not to need to change theoretically below normal circumstance, premise is not leak. Big leakage of cold intermediary leak is very good instead long, small leakage is repaired rise very arduous. Major maintains the place of air conditioning, do not receive like this kind of small leakage commonly, otherwise changes all pipeline. Fat last year elder brother breaths out flying Lu Baowei to repair leak to, the station controls in carrying, pipeline section is hit pressure, cost 3 days of final ability to discover the problem is at the back of condenser.
Welcome everybody to seek advice from car to maintain two handcart problem, fat elder brother can be in reply for a short while everybody, favorite friend can nod attention, later period has more to maintain knowledge and everybody to share.
