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97 850 NA - Regular soft knocks/clicks -- repeated pattern of movement

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

xHeart
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97 850 NA - Regular soft knocks/clicks -- repeated pattern of movement

Post by xHeart » Tue May 29, 2018 1:09 pm

The moment key is inserted in to ignition, clicks or knocking sound is heard inside the dash. The pattern is repeated endlessly -- click click - pause - click click. It is a gentle sound of plastic object trying to engage. More towards the passenger -- kick board than the glove compartment.

I am suspecting, it has started to stress the battery.
Heater works fine, fan is great, but AC hasn't worked for two years.

TIA!


--
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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bmdubya1198
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Re: 97 850 NA - Regular soft knocks/clicks -- repeated pattern of movement

Post by bmdubya1198 » Tue May 29, 2018 6:17 pm

Weird... that location of the noise would lead me to believe the blend door arms are the culprit, but that shouldn't do anything right when you insert the key.
I'd drop the kick panel and look around.


1998 V70 GLT Black/Beige 191k
2000 V70R Venetian Red/Black M56 Swapped 188k
2007 XC90 V8 AWD Sport Titanium Grey/Black 151k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green/Gray 158k Parting out... feel free to PM me if you need anything!
1988 744 Turbo M46 Beige Metallic/Beige 188k- Still kicking myself for getting rid of this one

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Re: 97 850 NA - Regular soft knocks/clicks -- repeated pattern of movement

Post by scot850 » Tue May 29, 2018 8:08 pm

Check the servo motors in the heating system as suggested. Whilst not guaranteed in your case, that is what I had with a bad servo motor as it wasn't able to find its home position. It was the one on the RHS of the center section to the back in my case.

Neil.


2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

xHeart
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Joined: Sat Dec 03, 2011 8:05 am
Year and Model: 1997 854 NA
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Re: 97 850 NA - Regular soft knocks/clicks -- repeated pattern of movement

Post by xHeart » Wed May 30, 2018 9:11 am

CORRECTION bmdubya: Not at inserting the key, rather at POSITION I & II.

#17 in this diagram is a motor. Does this motor controls shutter underneath the charcoal filter assembly?

Image

Details here:
http://volvopartslisle.com/assembly/253 ... eater-Unit


--
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: 97 850 NA - Regular soft knocks/clicks -- repeated pattern of movement

Post by scot850 » Wed May 30, 2018 10:36 am

Number # 17 is one of the motors. That controls the cold air intake and mounts to the side of the cabin fan housing. It should have a plastic rod that rotates and turns the flap behind the cabin fan motor and below the cabin filter.

Being an 850 there are 4 (?) more motors if I recall. There are 2 on the RHS of the center section. One where the arrow for #49 is pointed to and the other where #45 points to. The one at #45 goes into a plastic sleeve than can split open. You can try gluing it and then tightly wrapping a small zip-tie around the shaft to prevent it breaking again. You used to be able to buy a replacement part that could be replaced with an internal flap on that side of the center section. Not sure if it is still available.

The other 2 (?) motors are on the other side of the center section above your right knee.

Neil.


2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

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bmdubya1198
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Re: 97 850 NA - Regular soft knocks/clicks -- repeated pattern of movement

Post by bmdubya1198 » Wed May 30, 2018 11:29 am

Gotcha, that makes more sense. Number 17 is for going between recirculation and fresh air. You could probably test that by turning recirc on and off and seeing if you hear the noise.
Otherwise, the other motors/arms are for changing the zones. So, you could rotate the knob to change between the main vents, the floor vents, defrost, etc. and see if the noise stops on any of those settings. Or if you notice that the zone of air flow doesn't change when going from one setting to another, especially on the passenger side, that could point to that arm being an issue.

Hopefully that made at least a little sense, I'm trying to figure out how to word it!


1998 V70 GLT Black/Beige 191k
2000 V70R Venetian Red/Black M56 Swapped 188k
2007 XC90 V8 AWD Sport Titanium Grey/Black 151k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green/Gray 158k Parting out... feel free to PM me if you need anything!
1988 744 Turbo M46 Beige Metallic/Beige 188k- Still kicking myself for getting rid of this one

xHeart
Posts: 2381
Joined: Sat Dec 03, 2011 8:05 am
Year and Model: 1997 854 NA
Location: Great Lakes - USA
Has thanked: 12 times
Been thanked: 18 times
United States of America
xHeart

Re: 97 850 NA - Regular soft knocks/clicks -- repeated pattern of movement

Post by xHeart » Wed May 30, 2018 2:45 pm

It is the #17 motor. It stopped when switched from fresh air to recirculation. So at recirc it no longer clicks.

Thank you bmdubya and Neil.


--
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

User avatar
bmdubya1198
Posts: 2751
Joined: Tue Dec 30, 2014 10:45 am
Year and Model: '98 V70 GLT
Location: Charlotte, NC
Has thanked: 25 times
Been thanked: 64 times
United States of America
bmdubya1198

Re: 97 850 NA - Regular soft knocks/clicks -- repeated pattern of movement

Post by bmdubya1198 » Wed May 30, 2018 3:53 pm

Inspect the arm (#18). That's likely where your problem is.


1998 V70 GLT Black/Beige 191k
2000 V70R Venetian Red/Black M56 Swapped 188k
2007 XC90 V8 AWD Sport Titanium Grey/Black 151k
1998 S90- Silver/Gray 207k
1995 850 GLT Tropic Green/Gray 158k Parting out... feel free to PM me if you need anything!
1988 744 Turbo M46 Beige Metallic/Beige 188k- Still kicking myself for getting rid of this one

scot850
Posts: 5461
Joined: Mon Apr 05, 2010 2:46 pm
Year and Model: 2000 V70 R
Location: Calgary, Alberta, Canada
Has thanked: 6 times
Been thanked: 128 times
Canada
scot850

Re: 97 850 NA - Regular soft knocks/clicks -- repeated pattern of movement

Post by scot850 » Wed May 30, 2018 4:27 pm

It is the first thing that breaks that arm. It can still be bought new, or it was about a year ago.

Neil.


2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

xHeart
Posts: 2381
Joined: Sat Dec 03, 2011 8:05 am
Year and Model: 1997 854 NA
Location: Great Lakes - USA
Has thanked: 12 times
Been thanked: 18 times
United States of America
xHeart

Re: 97 850 NA - Regular soft knocks/clicks -- repeated pattern of movement

Post by xHeart » Wed May 30, 2018 4:41 pm

Thanks Neil!
I'll check with Volvopartslisle, meanwhile eBay shows:

Image


--
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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