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A/C
134 Upgrade & System Cleaning
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A/C
PART 2
Some of this may be redundant from part one, but its important
info
This
section describes how to replace & clean out components of your
a/c system Brief info... |
R12 -
R12 was the refrigerant in all cars up to around 1994. -
R12 uses Ester based oils that is compatible with 134A |
134A -
134A is the refrigerant used in all cars starting around 1994.| |
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To do the conversion job right - Replace
the liquid line, It goes from the evaporator (firewall) to the
condenser (before the radiator). IMPORTANT
TIP: the liquid line contains the Orifice tube, think
of it as a small filter which is guaranteed to clog, this should be
the first thing you replace. about $45 |
Accumulator
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The
accumulator removal and installation 1) First loosen & disconnect both a/c lines attached to the accumulator. Be careful with the one by the firewall. Inside the dash is the evaporator, do not twist or damage this, you will end up spending probably a weekend removing the dash to replace this...not fun. |
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There are 2 bolts holding the bracket to the firewall, I removed the bolts only to find I could not remove it, it was too big to pass through everything around it, looks like I didn't need to, just loosen the "clamp".
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Installation is simply the reverse. Make sure the clamp is open enough to slide the new accumulator into. Then tighten it. Attach the new hoses to the evaporator (on firewall) & compressor. The accumulator part is complete... |
Compressor
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Remove the Serpentine Belt |
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Now you will find 2 last bolts facing the valve cover, one you will not
be able to fully remove...instead of those remove the 2 bolts kind of
under the compressor so that when you lift it out the small bracket remains
with the 2 rear bolts. I did this a couple times then forced air with an air gun into the low end side (shown in photo with Blue cap) and shot out anything let inside, I rotated the clutch a few time to get all out. Installation is again opposite of removal. |