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Thread: Phil and Greg's AC Party
05-04-2008, 12:46 PM #21
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05-04-2008, 12:51 PM #22
05-04-2008, 01:19 PM #23
That stuff is obvious. The fabricated line in front of the radiator support the brazed fittings were warped and don't fit together with the lines. The low pressure hose that came out of the firewall was 2-3" too long and kinked when installed. I reused the stock there, but the other one I need to go and get a new line made. The compressor is also extremely difficult to install without the edge to support the compressor like the stock bracket.
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05-04-2008, 04:03 PM #24
An extra set of hands definately comes in handy when installing the compressor.
Doing it solo sucks, been there done that.
I start the top 2 bolts, just to support it, then the lower 2 bolts, slip in the washers/spacers, take out the top 2, slide in spacers, tighten up, done.
Hardest part on the first install I did was, no pics on how the brackets went.
Alot of trial and error there till I got it figured out.
I didn't have any problem with the line out of the firewall being that long.Joe B.
'89 MK III
05-04-2008, 08:51 PM #25
PhilG just emailed me.
Looks like it was a good time. The evaporator is a pill. If I ever replace one again,
I'm just going to additionally remove the upper dash panel, plus give all the duct work a cleaning.
40-45F at the vents is a good range. I've seen ~40F on mine at idle.
Recirc ON, next to highest fan speed, front electric fan on, 80F outside ambient.
When driving, there's more air exchange as well as the compressor is pumping more.
I recall mine hit 36/37F. BruceM noted as close to 32F on one of his
several status calls to me.
Greg - nice job on cleaning your evaporator.
Compressor Brackets - I used some hold down belts to position it. Still sucked.
Best to have a friend handy, as it will make short time of the install.
Aaron - shoot me an email on what you are having trouble with.
I have heard a few found the evap to EPR hose too long. Other's did not.
I did line them up once I got them, and none appeared too long.
Though I suspect the hose line is rather hard, and a 1/4" variance might
create the situation you encountered.
Leaving it uncharged - certainly it's a good idea to get it charged in a reasonable time frame once installed.
Since Phil keeps his whip stored, he should be ok.
I concur. A few of these pics could have alternate captions.Jim
MK2 Geek Squad Member
05-04-2008, 11:27 PM #26
05-04-2008, 11:40 PM #27
So while it reached 72F today (I know... hardly AC weather), I wanted to further test the system.
I let the car idle in my driveway with the compressor running for approx 20-25miins. Steady 40F blowing thru the vents. At roughly the 25min point, I snapped these pix of the suction lines with a slight frosty coating at the compressor and just forward of the radiator support. Does this suggest freezing up? I ask because the vent temp crept up to 45-48 F. I dont think the Evaporator was freezing because the suction line at the firewall was merely "sweating".
All pix taken approx same time...
05-04-2008, 11:48 PM #28
05-05-2008, 12:13 PM #29
so how bad was changing the condensor and expansion valve behind the dash? i have a brand new mk2 compressor and new toyota hoses coming off it an plan to buy a new heater core, expansion valve, and evaporator and drier and get my 84 7mgte going with real r12 like it was designed for. ill be replacing all o rings and all shrader valves as well just to be safe. just wondering as i am thinking of buyin the rest of the stuff as soon as my tax rebate gets here.william
Black 84 7mgte/R154, MS2, truetrac, bbk, etc...soon to have 2jzgte and t56
Blue 85 Beater. TRD Header, HKS Exhaust, custom 3in intake pipe, cone filter
Black 86 Triple Weber 6m Eventually
Rusty 85 Frankenstein 6M/w58 with DIYPNP
05-05-2008, 12:21 PM #30
Hey William... the condensor is pretty easy. Joe suggested we pull the hood latch and header reinforcement bracket rather than drop the radiator. I think that made things a little easier.
But the Evaporator is a pain in the ass no matter what you do. Seems like everything gets removed from the dash and center console to get it out. On the bright side, I think its a terrible mistake to NOT yank the evaporator when redoing the AC system. After seeing the crap clung to both ours, I doubt it wld ever cool if we didnt clean them out. My sure most all mk2's wld look similar by now.
Whats the going rate for R12 anyways these days?
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