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According to the chart, your target values should be:
Low: 30-32
High: 180-235
Center Vent Temp: 47°F- 53°F
Are you sure? With everythig off and at rest (in equilibrium), both, low and high, should be at the same pressure
Please, recheck this.
Doesn't seems too far off... If anything, the low is just a little low. You could try to add just a little, but keep an eye on the high!
Did you close the couplers before attempting to remove them?
Fixed the Schrader issue by depressing them just a little vey quickly. Seemed to re-seat them. I did close the couplers too..maybe they have been sitting for so long they wernt happy !
And yes the values don't seem far off with the engine running so may need a top up but that engine off reading is a bit weird.. the system hasn't been run for a good few weeks but I did warm the car up before attempting any measurements..I will go do another static engine off reading and report back !
Fixed the Schrader issue by depressing them just a little vey quickly. Seemed to re-seat them. I did close the couplers too..maybe they have been sitting for so long they wernt happy !
And yes the values don't seem far off with the engine running so may need a top up but that engine off reading is a bit weird.. the system hasn't been run for a good few weeks but I did warm the car up before attempting any measurements..I will go do another static engine off reading and report back !
Success ! L95psi and H100 psi!
Outside temp not really changed 75F but engine still warm. About 2.00 hours has elapsed since I started testing so cant work out why such a difference on the static pressures unless they go out of equilibrium over time ?
As for a top up with gas I am stuffed cos I can't buy the gas here
I am in the good old U and K London if you hadn't already realised and we have got new environmental laws here and they have banned R134a sales to us peasants!
Also this doesn't quite explain what I am gonna do about that little leak on the compressor which now turns out to be the o ring behind the pressure relief valve on the bottom of the compressor body its not bad but it sure is annoying
Success ! L95psi and H100 psi!
Outside temp not really changed 75F but engine still warm. About 2.00 hours has elapsed since I started testing so cant work out why such a difference on the static pressures unless they go out of equilibrium over time?...
That's good! A system in equilibrium should have both pressures the same. Perhaps the gauges needed some "exercise" to regain accuracy after storage and shipping
And no, equilibrium shouldn't be lost over time. It's the other way around: after using the A/C, pressures seek equilibrium as time passes by.
Originally Posted by weslp00
...As for a top up with gas I am stuffed cos I can't buy the gas here
I am in the good old U and K London if you hadn't already realised and we have got new environmental laws here and they have banned R134a sales to us peasants!...
No, I hadn't realized you were in the UK. OMG, those draconian laws are killing you!
Originally Posted by weslp00
...Also this doesn't quite explain what I am gonna do about that little leak on the compressor which now turns out to be the o ring behind the pressure relief valve on the bottom of the compressor body its not bad but it sure is annoying
As I mentioned before, you may want to consider adding
. It's supposed to stop small leaks and condition seals and o-rings. Comes like a regular can of refrigerant and at the same time it should also add a couple ounces of R-134a
That's good! A system in equilibrium should have both pressures the same. Perhaps the gauges needed some "exercise" to regain accuracy after storage and shipping
And no, equilibrium shouldn't be lost over time. It's the other way around: after using the A/C, pressures seek equilibrium as time passes by.
No, I hadn't realized you were in the UK. OMG, those draconian laws are killing you!
As I mentioned before, you may want to consider adding one of these. It's supposed to stop small leaks and condition seals and o-rings. Comes like a regular can of refrigerant and at the same time it should also add a couple ounces of R-134a
Yes draconian they are.. the law really is an *** over here. but I wont give in to them!
anyway leak stopper sounds like a plan..STP do an equivalent over here
That's the only way I can get R134a... and its got additives as well as oil. They also do a leak stopper but I just feel concerned about "extras" in the recipe ! Will have to have a think about this one. Least I know everything is working ok!
I have put the dust caps back on till I know what to do..
Stuart..
It will seem bass ackwards, but GM considers the dust caps to be the primary seals for the system. No kidding.
I feel terrible for not saying this before. I bought the Harbor Freight gage set, and the first time I used it on my Toyota pickup I bent one on my Schrader cores by turning the engagement **** a bit too tight. Not difficult for me to change, since I did not (at that time) have dust caps, and a day or so later it was quite simple to change the core...
It will seem bass ackwards, but GM considers the dust caps to be the primary seals for the system. No kidding.
I feel terrible for not saying this before. I bought the Harbor Freight gage set, and the first time I used it on my Toyota pickup I bent one on my Schrader cores by turning the engagement **** a bit too tight. Not difficult for me to change, since I did not (at that time) have dust caps, and a day or so later it was quite simple to change the core...
I was careful with the gage adaptors as I could see that they could bend the valve stem.. My problem was when I removed them. The high was hissing but a soft jab with a cloth covered allen key stem fixed it!
My problem now is a top up ..I cant get gas here as I would need a license.
The only stuff is this..what y'all think? Evidently according to the factory it is a R134a blend with other stuff which is the only legal way of selling...any good?
That should work! Though I have to admit I do not understand why one form of R134 is O.K. and another is not.
Air duster/cold spray is generally R134 in a spray can!
You're in London? I did two years in England in the military. You sure you need A/C?
As I recall, in two years I failed to take a jacket to work twice -- and regretted it both times.
That should work! Though I have to admit I do not understand why one form of R134 is O.K. and another is not.
Air duster/cold spray is generally R134 in a spray can!
You're in London? I did two years in England in the military. You sure you need A/C?
As I recall, in two years I failed to take a jacket to work twice -- and regretted it both times.
Yes I am confused too..I think STP have got a way round the regs ...
And its not all that bad here..spring has sprung and it was a barmy 78f today and more tomorrow... we even have bbq's here too !
Just for the record I did another static pressure check with engine off and both gages came in at 65psi with the engine cold and the outside temp as mentioned so cant be all bad seeing as they are reading the same now..think its top up time..after the bbq and a few beers!
I seem to recall that static pressure should be pretty much the same as ambient temperature (in F, of course), so you may indeed be a tad shy of refrigerant.
Yes I am confused too..I think STP have got a way round the regs ...
And its not all that bad here..spring has sprung and it was a barmy 78f today and more tomorrow... we even have bbq's here too !
Just for the record I did another static pressure check with engine off and both gages came in at 65psi with the engine cold and the outside temp as mentioned so cant be all bad seeing as they are reading the same now..think its top up time..after the bbq and a few beers!
I was wondering if you finally got around to putting the STP product in the system, BBQ and beers not withstanding
That STP product is supposed to stop leaks, among other benefits. Did it work? Have you noticed if the oily residue has decreased or completely stopped?
I was wondering if you finally got around to putting the STP product in the system, BBQ and beers not withstanding
That STP product is supposed to stop leaks, among other benefits. Did it work? Have you noticed if the oily residue has decreased or completely stopped?
Cheers!
Well believe it or not I was going to post a progress review on here and you have prompted me
So here goes..
After much head scratching I decided to find/speak to an AC guro over here and hopefully a trusty one who is mobile in case a visit to me is needed.
Well everyone including him said don't go near leak stoppers as a leak is a leak and a fix is only a short term remedy. So I shelved that idea.
Well they are bound the say that (because they want to tinker with your AC and make you pay) and he recommended a drain, vac and refill first.
The leak is from the control valve on the compressor ( google Delphi compressor control valve and you will see it)
He diagnosed it over the phone and said that I was indeed low on gas ( as I had verified using you guys help ) I thought to hell with it and give him a chance so a regas was planned for last week.
Job took about and hour or so..weighed the gas coming out and he calculated I was down by nearly a quarter of the capacity. So he refilled and weighed it as it went back in to the correct capacity and we got the centre vent temp down to 3.3c or about 38F and pressures up a bit on the low and high side. Being mobile he came to me and his panel van was crammed with kit.
So what about the pesky leak me thinks??? Well we got the car up in the air for the second time and climbed underneath with his UV light and there was no visible leak but I hadn't driven the car.
So Saturday out I went in a barmy 80F (I know its nothing by your standard) and ran the AC for about 45 mins... I got the car back in the garage and after cool down got the car up in the air and checked the compressor and it still looked dry .. BUT will it stay like that? Could a recharge reseat the control valve ??
AND he even checked over my WS6 Trans AM for free but said the pressures were fine and temperature ok so no need to recharge.
This guy you can really trust Sort of thing we are short of over here!
Sorry for so being long winded but this is how it went and I live in hope
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