928SS

I'm bored waiting for the AC guys to wrap up an AC service.

AC just quit yesterday, and driving a greenhouse isn't fun in socal. so here I sit, 2nd guessing the "pros".

85 928 w/the dual ac system. alledgedly the expansion valve is plugged after over 6 yrs no issues. can it be cleaned or is it a replacement only item?

thx!

dr bob

Rob--

The valve is ~$35. Buy a new one and be secure.

Rob Edwards

My '99% sure' answer is replacement only.

928SS

good point. got bored waiting for the replacement to show, but new one being installed as I type. just monday quarterbacking the call. kinda stupid for a guy that did a stroker to be sure all the "bad" parts got replaced, huh? must be the heat making me more retarded than usual.



ps, nice wheels rob

Jim bailey - 928 International

They can be cleaned it costs $100. .....

dprantl

Pretty much anything can be cleaned. But if the new part costs so little, it would not be worth the effort or risk if it was not cleaned properly.

Dan
'91 928GT S/C

928SS

thx jim... too late to worry about that one now, new it is..

but now it sseems the compressor blew up while refilling... argh... guess it's time to figure out what to do w/that little item. I keep saying, "everything is new, nothing is left to fail". then I find another old part that fails... oh well, 20+ years was a good run for that item I suppose.

think I'll pass on a used 20 year old unit or reseal effort just so I don't have to mess w/it for a bit longer - is there a conversion kit or ??? iirc, the GT unit is smaller and puts out better, yes?

thx!

RyanPerrella

for the time it takes to remove and replace it, spending the extra $35 seems like a no brainer. This is one of those jobs that you just replace the part. Its so cheap in relation to the cost to remove and reinstall it.

Mrmerlin

flush the lines before you install any new parts esp a compressor

Bill Ball

You mention you have dual AC. Is the rear AC working? If the rear works and the front doesn't, a plugged front expansion valve is highly likely. If both failed simultaneously, expansion valve would be less likely, but system pressures can be used to determine that. If both front and rear have failed, then you would need TWO expansion valves.

928SS

ya know bill - the same thought hit me after reading a thread that noted there are 2 parallel circuts for the AC units. seems to me it'd have to be a common denominator of some kind - compressor or a hose leak.

then after watching the compressor blow up. I think it was the compressor all along as it passed the leakdown test w/no issues.

so I threw a major tantrum over it and now they are willing to "make it right". whatever that means is beyond me though. not so sure I want them touching anything that connects to the motor after mis-diagnosing a simple AC issue and start yet another chapter of "why didn't I just bring the car to greg in the 1st place".

I suppose if I watch every move like I did for the expansion valve, the odds would be improved - but what a PITA.

car must be really pissed at me after the trans fiasco, ha!

too bad 928 intl isn't open today. I'd run down and snag a unit from them.

Bill Ball

So, both front and rear AC went out? The shop should tell you how they determined it is the expansion valve(s). They should also know there are two involved and the chances of both going out at the same time with nothing else seriously wrong to cause it, are quite small.

928SS

front worked fine till I activated the rear unit. I suspect the pressure drop killed the compressor w/the low pressure switch being activated cause the pressure was low to begin with.

prolly was low cause the compressor was leaking/slowly. the refull blew the already weak seal, or thats my guess at this point anyway. there was a low side pressure issue on the test, so he thought it was either the valve or compressor. didn't see any leaks, so the valve was tagged. but if he'd listened and knew that the 2nd ac was on a seperate circut, he'd probably have wanted to go for the compressor.

typcial 928 knowledge void. I repeatedly told him there was a rear AC and I still don't think he gets it is more than just a vent.

unfortunately, I didnt know about the parallel circut till after reading while I was waiting around. thought the recommended guy would have known that much. stupid me. looks like I'm gonna have to learn every damn thing about this car before contemplating taking it anywhere new, then give a prospective wrench a written and verbal exam before letting them within 100' of it. maybe should make him take a rennlist exam.. hmmm might be an interesting thread: things to ask a prospective wrench before letting him within 100' of your car.

time to find another shop before this gets any uglier. he was recommended by jules, but I think jules needs to be updated. looks like another trip to OC where folks don't think 928's are from mars... everyone knows they are from uranus. hahaha (I know, I know, I shoulda taken it to doc brown to begin with)