Welcome to the world's #1 Volvo forum!

Volvo Fixes & Advice since 2001.

Login Register

rattle from suspension or something else? 1998 S90

Help, Advice, Owners' Discussion and DIY Tutorials on all Volvo's "mid era" rear wheel drive Volvos.

1975 - 1993 240
1983 - 1992 740
1982 - 1991 760
1986 - 1991 780
1990 - 1998 940
1990 - 1998 960
1997 - 1998 V90/S90

Post Reply
thefisch
Posts: 47
Joined: Thu Jan 10, 2019 8:16 pm
Year and Model: 1998 S90
Location: West Central FL
Has thanked: 17 times

rattle from suspension or something else? 1998 S90

Post by thefisch »

For background, the front struts started leaking on our 1998 S90 about 3 months ago. Ride is bouncier and struts groan over speed bumps. We are planning to address in a few months after saving up.
viewtopic.php?f=2&t=96221&e=1

In the past few days, we started to notice a rattling sound over rougher surfaces - seems like metal on metal. While driving, it mainly occurs when the road surface gets rough or going over road pavers/bricks or little bumps in the road like manhole covers. Accelerating, braking or steering input doesn't seem to cause the rattle. And we don't hear it on smooth roads until we it a rougher patch. I recorded an audio file below.
Volvo rattle1.mov
(239.09 KiB) Downloaded 34 times
Control arm bushings, sway bar links, etc are older but all seem to be intact - not gone enough to allow metal to metal contact. Heat shielding along exhaust path is not loose either. Wonder if this could be coming from strut bearing plates. Any suggestions based on the sound?

lummert
Posts: 1366
Joined: Tue Jan 29, 2008 5:39 pm
Year and Model: 760 1988
Location: Portland Indiana, USA
Been thanked: 24 times

Post by lummert »

I'm guessing lower control arm inner bushing. My 1988 760 turbo wagon has a similar issue when turning into rough driveways. Upon inspection the lower control arm inner bushing appear worn.
1988 Volvo 760 Turbo Wagon

thefisch
Posts: 47
Joined: Thu Jan 10, 2019 8:16 pm
Year and Model: 1998 S90
Location: West Central FL
Has thanked: 17 times

Post by thefisch »

Here are some close-ups on the lower control arm bushings on the driver and passenger side. Yup, they are cracking but the rubber is still there. Perhaps they are cracked up enough to allow for contact sometimes.
driver side (should have used flash)
driver side (should have used flash)
passenger side
passenger side
passenger side taken with flash
passenger side taken with flash

thefisch
Posts: 47
Joined: Thu Jan 10, 2019 8:16 pm
Year and Model: 1998 S90
Location: West Central FL
Has thanked: 17 times

Post by thefisch »

Played the audio for a mechanic friend today and he though the frequency of the rattle indicated the strut bearing plates. Those will be replaced when the front struts get done so will know then.

Post Reply