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1996 850 - Crunching sound from front

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

Teddy1975
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Year and Model: 850 1996
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Teddy1975

1996 850 - Crunching sound from front

Post by Teddy1975 » Wed Apr 13, 2016 4:21 pm

When ever I drive over the slightest bumps and no matter what speed, I get some crunching sound from both front wheels. Other than that, nothing really happens, so I'm not overly worried about it being serious. I'm thinking maybe it can be the plastic part on the wheel bearing arms, that is misplaced/misaligned so it rubs up against the frame. I don't have access to lift the car here at home, but planning to go visit my parents where my lifting tools are.

Is there a reason for having this plastic "lids" in place or is it simply cosmetic?
Capture.JPG
It's the plastic piece inside the red line I'm talking about. What is the correct way to install it, the flap side can either go upwards and sit towards the frame where it bolts onto it, or it can sit underneath the frame. I had to undo the arms to get the drive shafts out and put new ABS wheels on the shafts. Which was dead simple.

I know it could probably also be the struts, spring, spring seats or something completely different.

Thanks a bunch.
I am getting stuff done on the car, and the repairs are seemingly going well. Until the next thing pops up. So far, nothing too serious to ground the car. Soon I will be getting stuff ready for changing TB and SB, which will be my first, but feeling quite confident after reading and watching how-tos both here and on youtube. After that job is done, I'll be having a closer look at PCV, as it's beginning to act up a little. Blue smoke at start up and some oil escaping the oil filler cap. My guess is the oil trap is either full or close to it and some of the hoses are probably blocked up. Talked to my indy parts guy and he basically said to find a piece of lawn hose and a smaller vacuum hose for the small hose that runs to the air intake housing. Lots of info regarding PCV changes on this site and as this is a N/A, I anticipate the worst part of the job will be to remove the intake manifold using only normal handtools.
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Current: 850 2.0L N/A, 4 door 1996 manual
Previous: 740 2.3L N/A, 5 door 1992 manual, and S70 2.5T 1999 manual

huzzsaba
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huzzsaba

Re: 1996 850 - Crunching sound from front

Post by huzzsaba » Wed Apr 13, 2016 4:44 pm

My guess is bad spring seat or strut mount. I am replacing those on my xc90 tomorrow as it is making a crunching noise over bumps.
2004 Volvo xc90 2.5t
1998 Volvo s70 T5M

blandis
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blandis

Re: 1996 850 - Crunching sound from front

Post by blandis » Wed Apr 13, 2016 6:30 pm

My guess is spring seats. I think most are putting the XC90 seats on the 850/s70. Spend the few extra bucks for Volvo seats and not aftermarket or another brand. Never had to replace them on my current s70... knock on wood.
Brad
Dallas, TX
1999 S70 T5
2006 XC90 2.5T

mecheng
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mecheng

Re: 1996 850 - Crunching sound from front

Post by mecheng » Thu Apr 14, 2016 8:11 am

I think it is a shield to keep salt water from drying the bushings and spraying inside the wheel well
1998 Volvo S70 T5 - SE - 240km - Sold July 2018
1997 Volvo 850 GLT - 190km
Boost is my drug of choice

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E Showell
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E Showell

Re: 1996 850 - Crunching sound from front

Post by E Showell » Thu Apr 14, 2016 8:20 am

I always assumed the plastic covers were to keep road debris from being thrown up and cutting the axle boots, but that is just an assumption.
'98 V70 NA FWD 5 spd, silver sand metallic (sold)
'99 V70 NA FWD Auto, dark blue (actively for sale)
'99 S70 NA FWD Auto, black (sold and resurrected -- Don't cry for me Argentina . . . )
'07 S80 3.2 FWD Auto, Barents Blue Metallic
'06 V70 R AWD Auto, Sonic Blue Metallic
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erikv11
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erikv11

Re: 1996 850 - Crunching sound from front

Post by erikv11 » Thu Apr 14, 2016 9:05 am

I agree :)

Crunchy over bumps sounds like spring seats, crunchy when turning the wheel even when the car is not moving sounds like strut mounts (= strut bearing plates). Plastic piece for some kind of debris protection, I try to keep it installed as long as possible.

FYI you don't need to be afraid of the stock P80 spring seat anymore, as long as you buy the Volvo part. About 4 or 5 years ago Volvo eliminated the old P80 part (and old part number) and now sell only one spring seat for the XC90 and the P80 cars (the 850 and 98-00 x70s). Same part number, same price, same part. They all use 30683637.
http://volvopartslisle.com/part/OEM-Vol ... pring-Seat
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 285k
'06 S60 R, 165k
'99 Camry V6 :shock: 125k
gone: '96 NA 850 210k, '98 NA V70 182k

polskamafia mjl
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polskamafia mjl

Re: 1996 850 - Crunching sound from front

Post by polskamafia mjl » Thu Apr 14, 2016 11:00 am

erikv11 wrote:Same part number, same price, same part. They all use 30683637.
http://volvopartslisle.com/part/OEM-Vol ... pring-Seat
That's fantastic news!
'All my money is gone and I have an old Volvo.' - Bamse's Turbo Underpants

Current: 1995 Volvo 850 T-5R Manual - Bringing it back from the brink of death
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Teddy1975
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Teddy1975

Re: 1996 850 - Crunching sound from front

Post by Teddy1975 » Thu Apr 21, 2016 10:00 am

Great news indeed regarding the OEM part now being the same.

However, I have checked the spring seat now, sorry for the delay, and it seems to be fine. The shock absorber needs to be replaced and I wonder if that could be the source of the crunching sound. When I push down on the wing, it creaks quite a lot from the wheel well and the car wobbles like jelly two, three times before coming to rest. I guess the crunching sound comes on impact when the strut hits the stop.

This car needs more TLC than I can afford at the moment.
Current: 850 2.0L N/A, 4 door 1996 manual
Previous: 740 2.3L N/A, 5 door 1992 manual, and S70 2.5T 1999 manual

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