Where is the High-Side Service Port Located?

[SWTomlinson]

I'm working on the vehicle of a friend of mine. It's a 2000 (?) Volvo V70, L5 2.4 Air Conditioning System.

I'm not 100% sure that it's a 2000 Year Model, but the Manufacturer Date is 11/99, and there is no Vehicle Emissions Control Information Label on the inside of the Hood or the Engine Compartment to help differentiate as is the case with the majority of other OBDII Systems in the current market.

However, the Repair Guides I use indicate that procedures are the same on all U.S. and Canadian models of Volvo Cars 1999-2005. (Too, I understand that there are times when information such as this is erroneous.) The 10th digit of the VIN is 'Y' if this helps (YV1LW61J4Y2687242).

The problem is that the Compressor shuts off intermittently after running for a while, and the system then blows warm air [of course]. Then, after a little while longer (times vary) the compressor will come back on, and the System cools sufficiently.


I found the Low-Side Service Port down next to the High-Pressure Switch, hooked up my Gauges, and the reading is 55 psi @ Engine Idle (clutch-engaged). The Low-Side then pulls down to only 35psi @ approximately 2000 rpm, which indicates to me that the system is over-charged.

However, I really do prefer to be positive about this by being able to monitor the system performance simultaneously from the High-Side Service Port, because the Orifice Tube may in fact be clogged instead of the System being over-charged . . . provided there is an Orifice Tube (no Expansion Valve shows up in Parts Listings).

On a day such as it's been today, with the Temperature & Humidity Mild/Low, the Low-Side should have pulled down to any where between 15-24 psi.

I've looked all over the Firewall from where the Evaporator Lines come out, all the way down the P/S Wheel-Well Frame to the Receiver/Dryer & onto the left side of the Condenser, to the right side (D/S) of the Condenser, and back to the Compressor . . . and all the way back again. I've done this twice.

Still I cannot find the High-Side Service Port.


Can anyone help? I would greatly appreciate it.

Thanks.

SWT