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Generic P80 AC clutch shim , bread clip, zip tie thread

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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abscate
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Re: Generic P80 AC clutch shim , bread clip, zip tie thread

Post by abscate » Mon Aug 27, 2018 1:15 pm

My 1999 clutch magnet got weak such that I had to reshim very tight to get it to work. My guess is it eventually touched and the clutch self destructed.

I put a new compressor and clutch in as it was gettting growly anyway

AC was needed this summer and was deeply appreciated


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Re: Generic P80 AC clutch shim , bread clip, zip tie thread

Post by xHeart » Fri May 10, 2019 2:49 pm

A/C maintenance time is here.
I'm looking at the zip tie method, checking the gap first.


--
Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +140mi/225km | 2001 V70XC 1st Owner +190mi/ +305km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
Past: German Shepherd | 1989 Volvo 740 GL | 1979 Volvo 240

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Re: Generic P80 AC clutch shim , bread clip, zip tie thread

Post by xHeart » Sat May 11, 2019 9:27 am

A clutch gap check with steel feeler gauge allow blades 0.3mm, 0.5mm, 0.53 to slide in. It takes gentle wiggle to slide in blades 0.55, 0.63mm. The 0.65mm blade does not fit the gap.

Is this clutch gap difference of +0.15 too wide and needs a fix? What's the limit, is a 0.53mm gap too wide?


--
Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +140mi/225km | 2001 V70XC 1st Owner +190mi/ +305km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
Past: German Shepherd | 1989 Volvo 740 GL | 1979 Volvo 240

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abscate
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abscate

Re: Generic P80 AC clutch shim , bread clip, zip tie thread

Post by abscate » Sat May 11, 2019 9:40 am

Spec is 0.3-0.5 mm, so you can up to 0.2 mm difference and be in range.

Note that the bigger gap isn’t detrimental as long as the clutch closes on demand. Once the clutch closes the rest gap is immaterial.

If your AC is cycling well I would not ziptie it, if you make it too tight, it’s quite spectacular when it breaks


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Re: Generic P80 AC clutch shim , bread clip, zip tie thread

Post by precopster » Tue May 14, 2019 8:16 am

I did this on a customer's 1999 V70NA to get him through Summer a few months ago. I used zip ties. Still working today, even though Vida shows a low AC pressure DTC.


Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

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Re: Generic P80 AC clutch shim , bread clip, zip tie thread

Post by xHeart » Sat May 18, 2019 12:23 pm

Okay, joining MVS P80 Ziptie Club.

One zip tie at each of the tree rings gaps it evenly. Feeler blade 0.25mm slides in like a knife on apple, while 0.30mm saws in with little resistance. Rotating the disk before zip tie was fluid, after, it grinds a hair.

What to expect since it is NOT known if freon is low?


--
Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +140mi/225km | 2001 V70XC 1st Owner +190mi/ +305km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
Past: German Shepherd | 1989 Volvo 740 GL | 1979 Volvo 240

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Re: Generic P80 AC clutch shim , bread clip, zip tie thread

Post by precopster » Sat May 18, 2019 6:39 pm

If AC freon pressure is tolerable to the CCM to turn on the compressor then you're good to go. If freon content goes below threshold it won't fire up the compressor. Best is to put a test lamp on the A/C connector to see if your clutch shim is working properly and that the compressor is firing when commanded by the CCM.

Also you can command the compressor on with Vida ECM Activations even if freon is low if it's a 1999-2000 P80 or a P2.


Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

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Re: Generic P80 AC clutch shim , bread clip, zip tie thread

Post by xHeart » Sat May 18, 2019 10:11 pm

It is our 1997 850 NA. The compressor did not kick in -- suspecting freon below threshold.

Haynes says, "Warm up the engine and turn on the air conditioner. The charging process requires the compressor to be running." For compressor cycle off if pressure is low due to low charge. It recommends "pulling low-pressure cycling switch plug and attach a jumper wire. This will keep the compressor ON." -- Is this about applying 12v directly to the single wire connectors clipped to the compressor housing?

For a more thorough job, would renting a manifold and vacuum pump help service the system following youtube procedure and help restore freon, oil, and dye to recommended levels? Also, could it all be accomplished with just the low-side since 850s do not came with high-side?


--
Golden Retriever | 2014D VIDA DiCE | 2013A XC90 +140mi/225km | 2001 V70XC 1st Owner +190mi/ +305km | 1997 Volvo 850 NA 1st Owner +180mi/ +289km
Past: German Shepherd | 1989 Volvo 740 GL | 1979 Volvo 240

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