- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
low side will be closest to fire wall ,on passengers side,look for a black cap with a mark on cap L the one closest to front of motor or grill is the hi side DO NOT USE THIS ONE if your charging from a can your fitting will only fit on low side . PLEASE follow all safety directions
Near the firewall you have both air cond pipes coming out. There is a black cap on the larger of the two alum pipes. It is under the air filter housing and should be able to see it without removing the air filter housing. That is the low pressure side. The high pressure should run along the chassis rail and near the radiator there is another black cap on a smaller alum pipe. Remember always yes always vacumm the air cond system for at least 3 hours to dry out the air cond system correctly. If you don't if will only work for a short time before playing up again. Some shops don't do this and wonder why a car keeps coming back for more gas. Good for them bad for customer.
It is either under the filter box,where the air cleaner goes,or next to the firewall next to the passengers side fender,look at the ac lines coming from the ac compressor,and follow them,look at the large ac line coming from the ac compressor,to the firewall,it will be on that line,and your single charge hose,will only fit the low side service port,so you can not hook up to the wrong one,if this was at all helpful,please rate,thank you.
I have a 2002 Impala 3.8L
There is one port between the air filter box and strut tower (driver's side). I'm pretty sure that's the low pressure port.
The high port is against the firewall behind the engine, about in the middle.
The ports are covered by black caps.
Newer vehicle come with R134 vs R12. Since the two are not compatible, R134 has larger fittings. AC system has two ports, High and Low. Low is return to AC Compressor and high is output. High port is first following line from compressor to condenser (condenser is at front of vehicle like a second radiator). Keep following line till you find high port (paint cap red). Second port is low (paint cap blue).
Sounds like the A/C system just needs to be recharged. When was the last time you had this done? Just take it in to your mechanic and he can do it for you and if that's not it for some reason, then he will be able to find the problem but most likely you need more freon added.
there are 2 ports one for low pressure and one for high pressure. the low pressure is bigger in diameter and is usually close to the dryer and or fender and firewall. the high pressure is near the condensor on the fron of the vehicle. if there are caps for the ports low will be blue and high will be red. low side pressure should be 35-50 psi and high pressure should be 135-150 psi