IPD sale Volvo Parts
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

Bad koni yellows?

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
chrillew
Posts: 57
Joined: Sun Oct 27, 2013 7:04 am
Year and Model: volvo 850 T-5R 1995
Location: Sverige
Has thanked: 0
Been thanked: 2 times
chrillew

Bad koni yellows?

Post by chrillew » Mon Feb 25, 2019 10:16 am

Hey

Was changing the top strut mounts both where shot. then i saw that the dampers was really easy to push in when i say easy, i could put the weight of my finger on them and they would compress with no force at all. but getting the shocks out again was another thing, i had to pull for a man and two to get it outwards so i could remount it again.

Sign of a failing shock ?



Ozark Lee
MVS Moderator
Posts: 14747
Joined: Thu Sep 07, 2006 8:24 am
Year and Model: Many Volvos
Location: USA Midwest
Has thanked: 4 times
Been thanked: 35 times
United States of America
Ozark Lee

Re: Bad koni yellows?

Post by Ozark Lee » Mon Feb 25, 2019 8:01 pm

I've never had the luck to have Koni struts so I don't know what is normal behavior is. On the Bilstein struts a good one has decent resistance both compressing and rebounding but the Koni Yellows are usually adjustable. It might be that they just need to be adjusted.

...Lee


'94 850 N/A 5 speed
'96 Platinum Edition Turbo
'99 V70XC - Nautic Blue
Previous:
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

chrillew
Posts: 57
Joined: Sun Oct 27, 2013 7:04 am
Year and Model: volvo 850 T-5R 1995
Location: Sverige
Has thanked: 0
Been thanked: 2 times
chrillew

Re: Bad koni yellows?

Post by chrillew » Tue Feb 26, 2019 2:13 pm

I think they where adjusted pretty hard, seemed like they almost compressed by them self just sitting there. but rebound is very stiff.

Weird that the rebound seems to work, but the compression seems ultra soft.



tardcart
Posts: 208
Joined: Fri Feb 08, 2019 4:17 pm
Year and Model: 96 850t. 93 940t
Location: Pittstown Nj
Has thanked: 0
Been thanked: 9 times
United States of America
tardcart

Re: Bad koni yellows?

Post by tardcart » Tue Feb 26, 2019 7:28 pm

A shock only works on rebound. Its impossible to resist compression, Imagine hitting a pot hole with the shock resisting upward thrust. nothing can resist that. It would blow out the shock or tower.



User avatar
erikv11
Posts: 8845
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, S/V70, 06 S60R
Location: Iowa
Has thanked: 46 times
Been thanked: 145 times
United States of America
erikv11

Re: Bad koni yellows?

Post by erikv11 » Tue Feb 26, 2019 9:41 pm

Actually something can (and does) resist that - the coil spring! Which is mounted to the strut body for that matter.

But yeah, shocks are for dampening vibration, however they can dampen compression and/or rebound. A compressed spring is always rebounding.


'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 205k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 275k
'06 S60 R, 155k
gone: '96 NA 850 210k, '98 NA V70 182k

User avatar
oragex
Posts: 4006
Joined: Fri May 24, 2013 6:20 am
Year and Model: S60 2003
Location: Canada
Has thanked: 76 times
Been thanked: 139 times
Contact:
Canada
oragex

Re: Bad koni yellows?

Post by oragex » Tue Feb 26, 2019 10:44 pm

I find compressing them with but one finger suspicious.. but at least I believe they should return by themselves... but again, each shock may be different. I've had several brands on my hands - but not the Koni - and the good ones were returning smoothly and quite quickly, while the bad ones were rather lazy at it or were taking forever. As for the force to depress, some are much lighter than others, but again, using just one finger seems a bit extreme.

But again, I'm no expert, who knows how the Koni are designed.. I'd say, the best way to tell is on the road: nice damping over street bumps, good quick handling at speed, stability, all these should tell. But if you google Koni problem or 'long lasting' you may find these are not the most reliable, at least not as long as a Bilstein


2003 2.4i S60 automatic 125k miles
DIY Volvo repairs videos https://www.youtube.com/playlist?list=P ... s0FSVSOT_c

chrillew
Posts: 57
Joined: Sun Oct 27, 2013 7:04 am
Year and Model: volvo 850 T-5R 1995
Location: Sverige
Has thanked: 0
Been thanked: 2 times
chrillew

Re: Bad koni yellows?

Post by chrillew » Wed Feb 27, 2019 1:46 am

Yeah well they are kinda old 5-7 years or so. in high speeds they tend to bounce also even what setting. think i should install the bilstein TCs and compare.



Sommerfeldt
Posts: 1045
Joined: Tue Jul 29, 2008 1:25 pm
Year and Model: 1996 850 T5
Location: Oslo Area, Norway
Has thanked: 34 times
Been thanked: 19 times
Norway
Sommerfeldt

Re: Bad koni yellows?

Post by Sommerfeldt » Wed Feb 27, 2019 6:41 am

I have Koni Yellows, and they’re definitely not supposed to be like that. Mine are pretty stiff all-round, even on the softest setting, do not bounce at all, and I’ve never seen the behavior you describe when I’ve had them off. Something is not right with your set. :(

- S


'96 855 T5, R bumper and spoiler, Koni Yellows & blue H&R springs all 'round.

Post Reply