[cgbofmfrp]

Hi everyone, my focus AC compressor seemed to be seized if turned on (ie, Car runs fine, but using Defogger or AC will put the engine to stop).
It seems like simply running a shorter belt will hit the water pump (5) and an additional pulley is needed (or convert the AC compressor into a pulley).

I search high and low, and it seems like @Masonu69 had figured out a perfect solution (see below)?

• Any one tried this?
• What belt length is need?
• Doing so reduced the length of the belt driven/wrapped by crankshaft pully(4) and water pump(5), any possible harm?

Thanks

 

[hEaT]

The issue with the changed belt routing you have shown there is the water pump will spin backwards. You would need to get a reverse rotation pump (maybe some RWD applications have one available) so coolant flows the correct way.

I'd rather go with the idler pulley, simpler and more "OEM".

 

[cgbofmfrp]

The issue with the changed belt routing you have shown there is the water pump will spin backwards. You would need to get a reverse rotation pump (maybe some RWD applications have one available) so coolant flows the correct way.

I'd rather go with the idler pulley, simpler and more "OEM".

omg, you are right...water pump is now backwards...btw, do you know what will cause a Car to run fine, but using Defogger or AC will put the engine to stop?

 

[hEaT]

omg, you are right...water pump is now backwards...btw, do you know what will cause a Car to run fine, but using Defogger or AC will put the engine to stop?

I would bet the A/C pump is seized. It sounds like you know, but putting on the defogger forces the AC on too.

 

[Cobranut1]

The issue with the changed belt routing you have shown there is the water pump will spin backwards. You would need to get a reverse rotation pump (maybe some RWD applications have one available) so coolant flows the correct way.

I'd rather go with the idler pulley, simpler and more "OEM".

That routing will NOT change the rotation of the water pump.
Without the additional load of the A/C compressor, the reduced wrap on the crank and alternator pulleys will likely pose no problems. I suspect the same will be the case with the water pump.

That said, if the issue is the A/C compressor stalling the car, just unplug the connector at the A/C clutch, so it will never engage.
Personally, I'd flush the system and replace the compressor, condenser and drier, but I like my A/C. LOL

 

[cgbofmfrp]

That routing will NOT change the rotation of the water pump.
....
That said, if the issue is the A/C compressor stalling the car, just unplug the connector at the A/C clutch, so it will never engage.
.............

1. Odd, I run the arrows again, it seems like you are right. This outing will NOT change the rotation of the water pump.(Not sure what happen last time I did this😂)
2. This is what I did for now, I unplugged connector at the A/C clutch. I also applied 12v at the connector, and the clutch didn't move. So I don't see why when I turn on the Defogger or AC the engine will stop. (Nothing suppose to happen or no???)
Do you think this is a simple clutch/coil issue or it is my compressor?

 

[Cobranut1]

1. Odd, I run the arrows again, it seems like you are right. This outing will NOT change the rotation of the water pump.(Not sure what happen last time I did this😂)
2. This is what I did for now, I unplugged connector at the A/C clutch. I also applied 12v at the connector, and the clutch didn't move. So I don't see why when I turn on the Defogger or AC the engine will stop. (Nothing suppose to happen or no???)
Do you think this is a simple clutch/coil issue or it is my compressor?

View attachment 7759

Does it still stall with the connector unplugged?
If not, than it's likely the compressor locked up.
If so, there may be another electrical problem.