Heater Bypass
Senior User
Joined: Jun 2003
Posts: 475
Likes: 1
From: La Habra, CA
Did a little more research, the excursion shares the compressor with the following vehicles
EXCURSION 00 - 01 10-415 (6.8L)
EXCURSION 00-01 8-330 (5.4L)
EXPEDITION 97 98 99 00 01 02
FORD VAN 97-00 10-415 (6.8L)
FORD VAN 97-00 8-280 (4.6L)
FORD VAN 97-00 8-330 (5.4L)
NAVIGATOR 98-02:
The truck must get a smaller compressor. The condenser is the same for both. The evaporator (inside part) is the same for both the EX and truck. Might be a second evaportator in the back of the EX somewhere.
Eric
EXCURSION 00 - 01 10-415 (6.8L)
EXCURSION 00-01 8-330 (5.4L)
EXPEDITION 97 98 99 00 01 02
FORD VAN 97-00 10-415 (6.8L)
FORD VAN 97-00 8-280 (4.6L)
FORD VAN 97-00 8-330 (5.4L)
NAVIGATOR 98-02:
The truck must get a smaller compressor. The condenser is the same for both. The evaporator (inside part) is the same for both the EX and truck. Might be a second evaportator in the back of the EX somewhere.
Eric
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Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
Originally Posted by etcetera
Did a little more research, the excursion shares the compressor with the following vehicles
EXCURSION 00 - 01 10-415 (6.8L)
EXCURSION 00-01 8-330 (5.4L)
EXPEDITION 97 98 99 00 01 02
FORD VAN 97-00 10-415 (6.8L)
FORD VAN 97-00 8-280 (4.6L)
FORD VAN 97-00 8-330 (5.4L)
NAVIGATOR 98-02:
The truck must get a smaller compressor. The condenser is the same for both. The evaporator (inside part) is the same for both the EX and truck. Might be a second evaportator in the back of the EX somewhere.
Eric
EXCURSION 00 - 01 10-415 (6.8L)
EXCURSION 00-01 8-330 (5.4L)
EXPEDITION 97 98 99 00 01 02
FORD VAN 97-00 10-415 (6.8L)
FORD VAN 97-00 8-280 (4.6L)
FORD VAN 97-00 8-330 (5.4L)
NAVIGATOR 98-02:
The truck must get a smaller compressor. The condenser is the same for both. The evaporator (inside part) is the same for both the EX and truck. Might be a second evaportator in the back of the EX somewhere.
Eric
Senior User
Joined: Sep 2005
Posts: 159
Likes: 0
From: Rancho Cucamonga, CA
Originally Posted by krewat
If you increase the pressure in the high side of the system (bigger compressor) you get more cooling action as it hits the evaporator. Check if the orifice is different between the EX and F-series.
Thanks!
Senior User
Joined: Jun 2003
Posts: 475
Likes: 1
From: La Habra, CA
Does anyone know a parts site that gives ford parts numbers? It's kind of hard to tell on the sites I'm looking at if the parts are actually different.
There's a kit that includes the following, taken from ebay # 8064643096
KIT INCLUDES ABOVE NEW COMPRESSOR FILLED WITH ULTRA PAG OIL, NEW ACCUMULATOR/DRIER, NEW EXPANSION VALVE/ ORIFICE TUBE AND ALL ORINGS
The compressor includes pulley and clutch. It's available cheaper than this auction. All for the Excursion.
If my compressor ever fails I'll give it a try. I don't think I'll be spending the money when it works ok now.
Some excursions have an auxillary AC unit as an option. It's the same compressor and condenser with either system.
Eric
There's a kit that includes the following, taken from ebay # 8064643096
KIT INCLUDES ABOVE NEW COMPRESSOR FILLED WITH ULTRA PAG OIL, NEW ACCUMULATOR/DRIER, NEW EXPANSION VALVE/ ORIFICE TUBE AND ALL ORINGS
The compressor includes pulley and clutch. It's available cheaper than this auction. All for the Excursion.
If my compressor ever fails I'll give it a try. I don't think I'll be spending the money when it works ok now.
Some excursions have an auxillary AC unit as an option. It's the same compressor and condenser with either system.
Eric
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
Likes: 20
From: Washington State
FWIW...
All Excursions have a recirculating system in the back. It has it's own evaporator and draws in NO outside air. It only recirculates the air in the truck.
There are no vents on the Excursion's console. We have the same dash with the same vents. The only difference is the rear AC pushes air through the vents up top (for cold air) and out a vent on the floor (for hot air) by the left, rear passenger door.
One of the major problems with the Super Duty's AC stems from the lack of refrigerant. Most who complain about it's performance find that the refrigerant level is too low. The Excursion has more refrigerant since the system is essentially twice as big (to run the back). That is why it can cool down the cabin much faster with just the front on. (I rarely use the rear AC since the front works so well)
I'd check R134a levels first, then do the by-pass mod (if needed) before I started swapping out identical parts with each other.
Every year right about this time, the boards get swamped with poor AC performance questions!
Wonder why that is? 
All Excursions have a recirculating system in the back. It has it's own evaporator and draws in NO outside air. It only recirculates the air in the truck.
There are no vents on the Excursion's console. We have the same dash with the same vents. The only difference is the rear AC pushes air through the vents up top (for cold air) and out a vent on the floor (for hot air) by the left, rear passenger door.
One of the major problems with the Super Duty's AC stems from the lack of refrigerant. Most who complain about it's performance find that the refrigerant level is too low. The Excursion has more refrigerant since the system is essentially twice as big (to run the back). That is why it can cool down the cabin much faster with just the front on. (I rarely use the rear AC since the front works so well)
I'd check R134a levels first, then do the by-pass mod (if needed) before I started swapping out identical parts with each other.
Every year right about this time, the boards get swamped with poor AC performance questions!
Wonder why that is?
Senior User
Joined: Jun 2003
Posts: 475
Likes: 1
From: La Habra, CA
On ther ford parts site there are some parts with 2 listings, with or without a rear AC. Maybe an option not to have one installed then?
One thing for sure, the superduty AC is marginal at best, at least a crew cab in the desert.
Eric
One thing for sure, the superduty AC is marginal at best, at least a crew cab in the desert.
Eric
Senior User
Joined: Sep 2005
Posts: 159
Likes: 0
From: Rancho Cucamonga, CA
Originally Posted by Monsta
Every year right about this time, the boards get swamped with poor AC performance questions! Wonder why that is?
Wonder why that is? My wifes Expy blows cold cold cold... much better, but it has rear AC so that may be the difference, although I think the front vents blow colder than the SD vents (never measured, just hand in the airstream). Interesting though, my company car is a 4 door sedan of the foreign variety and the AC will freeze you right out of the car.
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From: Long Island USA
Monsta! Thanks for reminding me of the "fix" that was discussed here SO long ago!
It is very true that many people had low refrigerant.
I'm one of those people who love to figure out what parts are the same (and different) between platforms.
Theoretically, think about it. The compressor pumps refrigerant through the orifice. As it passes through the orifice and hits the low-pressure side it "evaporates", drastically lowering it's temperature. The "evaporator" gets cold, and we have A/C. Forget the condensor for now. If you up the pressure in the high side (either a bigger compressor or more refrigerant (THANKS MONSTA!)), the drop across the orifice is higher so the temp gets lower.
But, I wouldn't do that without discussing it with an AC guy with more knowledge than I
It is very true that many people had low refrigerant.
I'm one of those people who love to figure out what parts are the same (and different) between platforms.
Theoretically, think about it. The compressor pumps refrigerant through the orifice. As it passes through the orifice and hits the low-pressure side it "evaporates", drastically lowering it's temperature. The "evaporator" gets cold, and we have A/C. Forget the condensor for now. If you up the pressure in the high side (either a bigger compressor or more refrigerant (THANKS MONSTA!)), the drop across the orifice is higher so the temp gets lower.
But, I wouldn't do that without discussing it with an AC guy with more knowledge than I
Mountain Pass
Joined: May 2001
Posts: 246
Likes: 0
From: MT
Krewat, there is a fine line when it comes to adding freon to a unit..If the unit is under charged from the factory (or a leak) then fine, add some freon..If you over charge a system you raise the pressure (which ties with the temp) because you are now pumping too much liq freon into the evap (this is normally is on a fixed metering system, a system with a TXV metering device will only allow, normally, in as much freon is needed to get the evap to the temp it was designed for)..Plus you will run a real good chance of slugging the compressor with liq freon that didn't get a chance to boil off into a vapor in the evap, this will break a valve, piston, rod, or crank..And (this is just an example) you don't want to add a 3 ton (unit for meassuring amount of cooling a system will do) compressor to a 1 ton system..I wouldn't add a bigger compressor to a system unless it is designed to operate that way..JMO..
Last edited by fordfan428; Jun 7, 2006 at 12:09 AM.
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From: Long Island USA
I didn't mean to condone over-filling it with refrigerant
And if there is a larger compressor in the EX, and the evap and condensor are the same, I'd wonder what size the orifice tube is.
And if there is a larger compressor in the EX, and the evap and condensor are the same, I'd wonder what size the orifice tube is.
Mountain Pass
Joined: May 2001
Posts: 246
Likes: 0
From: MT
I just didn't want people running out and adding a whole can of freon because they read that more is better..Use gauges to check the pressures, if they are lower then where they should be then add a little freon at a time to get the pressures up which will help cooling..I think I saw someone posted a chart of what the operating pressures should be..
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Joined: Jul 2002
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From: Long Island USA
fordfan428, THANKS for clearing that up. I neglected to fully explain, and I'm glad you came along to warn people
I personally have to get adapters for my gauges to check the pressure in my system, but it's been working great so far with the heater core bypass, so I haven't even bothered.
I personally have to get adapters for my gauges to check the pressure in my system, but it's been working great so far with the heater core bypass, so I haven't even bothered.
Post Fiend
Joined: Jun 2003
Posts: 5,643
Likes: 8
From: NE Texas
Yeah - I was one of those that had the too-warm problem. Took it back to the dealer, who said all is fine. Took it to a vehicle AC guy, who added more and it's been cold ever since.
Just gotta take it to somebody that really knows.
Just gotta take it to somebody that really knows.
Mountain Pass
Joined: May 2001
Posts: 246
Likes: 0
From: MT
Sarcastic..As to the ? on the size of the fixed orifice tube..According to the motorcraft web site a 01 superduty, 01 exc , and 01 exp all use the same part # for the tube but if you have aux ac you get an expansion valve..Not saying all years are the same, just checked my year..