1998 Chevy Prizm Orifice tube

HOMERBSHARP

MEMBER
1998 CHEVROLET PRIZM
4 CYL
FWD
AUTOMATIC
160,000 MILES

I have 380 high side and 35 low on a hot day and it doesn't change when I run the car and ac. Nothing gets cold. I am assuming I have a high side blockage. Does that sound right, and can you tell me where the orifice tube would be located?
Thanks!

3 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Hi Homerbsharp, Welcome to 2carpros and TY for the donation

System Operating Pressure (3)
High Side270-305 psi (18.9-21.4 kg/cm2 )
Low Side34-40 psi (2.3-2.8 kg/cm2

I am assuming I have a high side blockage. if it is the high side will be low and so as the low side.

Could be air in the system or its overcharge

Removal Procedure

Disconnect the negative battery cable.
Discharge and recover the refrigerant.
Important: Cap the open fittings to prevent dirt and moisture from entering the refrigeration system.

Disconnect the union (4) of the evaporator liquid hose (5) and the evaporator liquid tube (3).

Carefully remove the orifice tube with needle nose pliers.
Installation Procedure

Important: Use new O-rings lubricated with 525 viscosity mineral oil.

Install the orifice tube to the evaporator liquid hose.

Connect the evaporator liquid hose (5) to the evaporator liquid tube (4).
Tighten
Tighten the evaporator liquid hose (5) to the evaporator liquid tube (3) union (4) to 25 N.m (19 lb ft) .

Connect the negative battery cable
Evacuate and recharge the refrigerant system
Operate the A/C system and check for leaks.