Quote:
Originally Posted by tyl604
.....and have I been doing it wrong all these years by topping it off when I see bubbles in the sight glass?
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Here is the situation... and I do not know if you have an accurate way to measure the amount you add or not... I am assuming you are adding a 12 oz can when you ' top off' ....(?)
IF you are careful AND GO SLOW... and your vent temperatures were NOT what they should be...over a period of time... several days of various types of driving would be my criteria...
and if you have forced air across the condensor, and the engine rpm's at high idle....
and still have bubbles...
AND you add small amounts at a time.. like shoot for a couple of ounces... then go drive the car.... always checking for changes in your vent temperatures... ( keeping in mind that checking low vent temperature is done on SLOW fan ) ....
If you follow these very conservative items... not leaving out any... you should be able to SAFELY add refrigerant to your car's system...
This would be the type of addition which was meant to replace the ENGINEERED LEAK at the compressor which is used to lubricate the front seal on the compressor... NOT TO ADD BECAUSE YOU HAVE A LEAK THAT NEEDS FIXING....
The main point is to add very little at a time and be sure you have given it time and conditions to assimulate itself into the system and show the effect in the vent temperatures....
Remember, your system can work JUST FINE with several ounces less than max.... but one ounce too much overworks the system ALL THE TIME and affects cooling in addition...
Checking for low temp at low fan speed is not what you do when adding and stabilizing the system.. that is at high fan speed, max air with windows open.