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Old 09-10-2023, 02:53 PM
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Henn28 Henn28 is offline
Join Date: May 2021
Location: Louisiana
Posts: 563
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AC compressor choices

Getting an odd low rhythmic growling noise for a few seconds (best way I can describe it) on start, a second or so after the engine fires up and stabilizes. It’s not happening all the time, but is clearly tied to something spinning and goes away after a few seconds. Both my fan clutch and ac compressor are original, so one or the other is my prime suspect for a bearing starting to go.

I’m trying to narrow it down by only starting the car with the climate control Off, which would point to the compressor if I can’t repeat it in this configuration. That said, I see two makes of compressors at FCP: Denso and Mahle/Behr while ECS Tuning lists a Nissens compressor. Any recommendations between these three, if that’s where I end up? Denso is OEM I think, and while none are crazy money, the other two are about $100 less than the Denso.

I’ll likely throw a new fan clutch and fan (design change at some point after mine was made) at it anyway too, since mine is so old. I worry about the fan coming apart at high rpm.
Original owner 2002 E53 X5 4.4i to 4.6i swap
1993 Mopar 318 Jeep Grand Cherokee - original owner
2015 V6 Jeep Grand Cherokee - the nice car for my wife
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro

Last edited by Henn28; 09-10-2023 at 03:05 PM.
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