Engine cooling fan

Tiny
JAMES JONES SR
  • MEMBER
  • 1993 FORD E-SERIES VAN
  • 5.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 117,000 MILES
I am considering replacing my five blade radiator fan with a seven blade cooling fan. What problems do I face and would I see any benefits in A/C cooling if the refrigerant pressures are correct?
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Sunday, July 15th, 2018 AT 9:45 AM

13 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good afternoon.

It would increase air flow through the radiator and AC condenser and will benefit when you are pulling hills.

As far as colder AC, no. If it is working correctly, then it will not get colder.

Roy
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Sunday, July 15th, 2018 AT 10:47 AM
Tiny
JAMES JONES SR
  • MEMBER
Thanks Roy. The reason I am asking is I cannot seem to get my A/C colder than 50 degrees on a day that is 85 degrees. I have evacuated the system, cleaned an inline refrigerant filter, changed the orifice tube and vacuumed the system for four hours and held the vacuum for one hour before proceeding to add refrigerant. I loaded the system with five 12 ounce cans of refrigerant which is 60 ounce's a little more than you answered a previous question of 57.3 oz's. The reason I evacuated the system is that before the evacuation I could not get the temperature below 65 on an 85 degree day. In the mornings when it is cooler it will drop the vent temperature to 45 or so. I had a little improvement and I was hoping changing the five blade fan to a seven blade fan and replacing the clutch fan would help with cooling a little better. I also already cleaned the condenser and radiator with a cleaner hoping to improve air flow and straighten any bent fins. This is a system that was converted four years ago and was working fine. I just cannot seem the figure out what the problem is. Oh, and it seems that the A/C clutch does not disengage on either regular or max setting.
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Monday, July 16th, 2018 AT 6:36 AM
Tiny
ASEMASTER6371
  • EXPERT
Okay, can you give me the high and low side readings when the system is running?

Also, when you show 60 degrees, try spraying the condenser down with water from a garden hose and see if the temperature drops.

What filter did you clean?

Roy
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Monday, July 16th, 2018 AT 1:48 PM
Tiny
JAMES JONES SR
  • MEMBER
Sorry Roy, it is taking so long to get back to you. I am on a golf trip. When I get back I will try the water on condenser suggestion and get you the pressure readings.

The filter I am talking about is an add on filter that I added when my system went out prior because all the descendant left the dryer and went all through the system. I had to flush the entire system so to ensure I got all the small particles I added an inline filter made for a different model of Ford. All it is is a three inch long by inch and a half aluminum cylinder with a screen in the middle and compression fittings for attaching it inline. Your help is greatly appreciated and that is no BS.
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Thursday, July 19th, 2018 AT 5:13 PM
Tiny
ASEMASTER6371
  • EXPERT
You are welcome.

Keep me updated.

Roy
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Thursday, July 19th, 2018 AT 5:23 PM
Tiny
JAMES JONES SR
  • MEMBER
Okay Roy, here we go I have a lot of information for you including a few pictures.

Outside temperature 80 degrees low humidity.
Static pressure hoses connected valves closed engine not running HS = 88 LS = 88.
Engine running about 1,000 rpm's (guessing) LS = 40 HS = 165 Vent temperature fan on high speed using max air Front = 53 Rear = 69.
Running and misting with water max air front = 54 no reading for rear air.
Engine off valves on gauges open LS = 88 HS = 85.
Took for test ride and then retested pressures while idling LS = 55 HS = 275 misted with water while idling LS = 53 HS dropped to 200.
Static pressure after running engine for tests LS = 110 HS = 110.

Used a infrared temperature thermometer and got these readings from various parts of the A/C:
Dryer = 77 degrees, filter I added on = 113 and high side connection tank 153. You can see the high side tank I am talking about in one of the pictures.
I hope this information helps.
.
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Saturday, July 21st, 2018 AT 11:35 AM
Tiny
ASEMASTER6371
  • EXPERT
Okay, did you spray down the condenser with a garden hose to see if the pressures drop and the air gets colder?

The low side is high. It should be around 25-30 lbs.

Roy
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Saturday, July 21st, 2018 AT 1:13 PM
Tiny
JAMES JONES SR
  • MEMBER
Running and sprayed with water hose on condenser max air Front = 54 no reading for rear air.

Took for test ride and then retested pressures while idling LS = 55 HS = 275 sprayed with water while idling LS = 53 HS dropped to 200.

Forgot to mention that during the test ride the vent temperature was able to drop to 45 degrees at 60 mph.
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Saturday, July 21st, 2018 AT 6:16 PM
Tiny
ASEMASTER6371
  • EXPERT
Both sides are high. Looks like it is overcharged.
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Saturday, July 21st, 2018 AT 6:57 PM
Tiny
JAMES JONES SR
  • MEMBER
Do you think there is a possibility that there may be some sort of blockage in the rear air since its only going down to 69 degrees?
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Monday, July 23rd, 2018 AT 3:40 AM
Tiny
ASEMASTER6371
  • EXPERT
Pressures do not indicate any blockage, just overcharge or possible moisture in the system.

Roy
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Monday, July 23rd, 2018 AT 3:52 AM
Tiny
JAMES JONES SR
  • MEMBER
Well Roy, I think I have depleted my will to solve this problem and it is time I take it to someone who actually knows about A/C in auto's. Your help has been invaluable it is just I am not smart enough to carry on. I have not the means to evacuate the refrigerant except into the atmosphere which I know is illegal, so I think it is time to seek a local technician. Thank you so much for your help and quick responses.
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Monday, July 23rd, 2018 AT 4:34 PM
Tiny
ASEMASTER6371
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You are welcome. We are glad to help.

Roy
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Monday, July 23rd, 2018 AT 4:42 PM

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