The low pressure AC port can be found on the passenger side engine compartment. The port is located near the oil cap for the engine.
Where is the OBD port 1992 Toyota Corolla?Read more: Where_is_the_OBD_port_1992_Toyota_Corolla
You can refill your air conditioning system from the low pressure port on the air conditioner compressor. The low pressure port will be labeled as such.
The low pressure port should be on the passenger side of the engine compartment. It is at the back right against the firewall.
In the engine, usually in an oil pressure port
standing in front of the car, the low pressure port is on right hand side near the fuse box. the high pressure port is on the left hand side near the windshield washer fluid tank.
The 1997 Toyota Avalon air conditioning low pressure switch can be found on the top of the air conditioning compressor. The low pressure switch will be labeled as the low pressure port.
It will be mounted to a pressure port on the service (foot) brake valve
Ive heard its near the passengerside front under the hood near the firewall...
standing in front of truck, on left by blower housing
left side on firewall should be on the side of ac condencer
Well, if the noise is coming from within the engine, it could be a piston rod. If it has ever run low on oil for an extended or cumulative amount of time - or sludge has built up in an oil port (low oil pressure), the crankshaft journal bearings will wear thin. My wife let this happen and the piston rod wound up cracking the block. Replacing a block is very expensive and time consuming. Also, there are no manuals available for Paseo's any more. However, there are forums available for Toyotas and the folks are generally very helpful. You can also look for information on a 5EFE engine. It could be something else, but that is where I would start looking immediately.
look for the port with the black cap on it, it's the low pressure port.