Question about 1997 Mercury Mountaineer

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It looks like the ac/climate pulley is not spinning. is this an easy fix? is it ok to drive?

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Yes its okay to drive if you are referring to the A/C compressor clutch. The outer part in front of the belt is a magnetic clutch. When the A/.C or the Defrost is not turned on, the pulley will freewheel.

If the A/C does not work when turned on, the Safety switches are probably preventing the magnetic clutch from engaging. This is the way it is designed. If you are not having a problem cooling then everything is normal. It is even normal for the magnetic clutch to cycle off and on. When the A/C is turned on, the magnetic clutch should be on more often than not.

If the car does not cool down you have a Freon problem which can be an easy fix depending on the amount of Freon in the system. It is safe to drive with or without the A/C.

Posted on Oct 05, 2010

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1 Answer

If the ac pulley is frozen, can you use a belt for a non ac car and bypass the ac pulley?


NO
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pull the pulley off the compressor and fit new bearings or if the pulley still spins when the ac is not on , disconnect the wire to the compressor

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http://www.autozone.com/cooling-heating-and-climate-control/a-c-compressor-bypass-pulley

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Hi Kirk,

For the outside rib, look at alignment. Not always easy to find, but small amounts make noise and wear, sometimes.
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The tensioner has zero option as to how much it spins. Tensioners and their bearings need close inspection.

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If idle pulley was replaced and still noise what is it


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1 Answer

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no year or brand car stated, you make it 100 times harder..
at all times?
there are 2 easy and cheap tests.
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2: is the pressure at the test port about 40 psi, buy a refill kit
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1 Answer

Install Drivebelt but splits in two


Not sure I follow your question, but I will offer a clarification to what you said.
The compressor clutch is a free-wheeling pulley until you engage it electrically. As long as the ac and defrost is turned off the compressor could be empty of freon and the pulley should still spin. So you should be able to drive the car for several miles or days with the climate control off and see if the belt is going to last.
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1 Answer

AC Clutch noise and vibration


An A/C clutch will not make this concern happen, more likely the A/C compressor is begining to go out. The belt on the A/C clutch Assy. free wheels (spins feree on the pulley) when clutch is not engaged. If concern is not present with A/C off this means the bearings in the puley assy. ok. Once the A/C clutch is engaged it locks the compressor against the spinning pulley and turn the compressor chaft and spins the A/C compressor internal shaft. If you hear a loud "screach" when you turn on the A/C it means the belt slipped for a second, if it continiues to screach it means either the belt is loose or that the compressor is internaly locking up. I wouild start by checking the belt tension (if not equipted with and auto tensioner). You can also remove the belt and turn on the A/C and attempt to turn the clutch/pulley by hand, it should turn with a little effect but should not bind or lock at times if that happens compressor is bad.

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3 Answers

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