I rarely use my a/c in my R, but recenly I turned it on for a while on the interstate. I pulled up to a drive-through and heard an intermittent clicking noise coming from the engine bay. After I got my aRby's I pulled off to a parking spot and opened the hood. It sounded like a bearing rubbing or something. The only time I've heard a similar noise was in my 300zx days before my power steering pump bearing blew out= a mess. Anyway, I turned it on again today and immediately noticed the same noise. It doesn't happen when the air is on, only when a/c in engaged. I was thinking my compressor may be going bad, although it blows cold. Any idea's? Thanks

 

check your ac lines.. could be a leak..

 

Are you sure the intermitted "click" is not your compressor clutch engaging?

 

Any chance it's the A/C fan by the radiator, not the compressor itself?

-Chris

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98Itr-0448 &raquo;</TD></TR><TR><TD CLASS="quote">I rarely use my a/c in my R, but recenly I turned it on for a while on the interstate. I pulled up to a drive-through and heard an intermittent clicking noise coming from the engine bay. After I got my aRby's I pulled off to a parking spot and opened the hood. It sounded like a bearing rubbing or something. The only time I've heard a similar noise was in my 300zx days before my power steering pump bearing blew out= a mess. Anyway, I turned it on again today and immediately noticed the same noise. It doesn't happen when the air is on, only when a/c in engaged. I was thinking my compressor may be going bad, although it blows cold. Any idea's? Thanks</TD></TR></TABLE>

Its due to the fact you do not use the a/c often. By occasionally using the a/c keeps the system lubricated. You may also want to check for belt tensioner and perhaps a belt replacement.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MUTANT X &raquo;</TD></TR><TR><TD CLASS="quote"> You may also want to check for belt tensioner and perhaps a belt replacement. </TD></TR></TABLE>

I agree, most likely the tension on the A/C belt.

 

I have a similar sound also only when I turn the A/C on. Sounds like a repetative clicking/chattering. I was thinking it was the belt as well.