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PV, 120 (Amazon), 1800 General Forum for the Volvo PV, 120 and 1800 cars |
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Front suspension noise....Views : 1808 Replies : 18Users Viewing This Thread : |
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Oct 22nd, 2009, 18:07 | #1 |
Amazoniste
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Front suspension noise....
My old heap is kindly making an interesting noise from the front end - I think it's the left hand suspension, especially under heavy braking. Best described as a graunching sound.... It's not rotational - more of a metal to metal contact?
Brake pads are fine (plenty of meat on them), caliper bolts are fine, and I think the damper bushes are ok too. Certainly no free play / movement in the latter. What are my likely culprits? I'm thinking top wishbone bushes, caused by the braking drag on the wheel taking up slack in a knackered bush, in particular as the nose dives under braking? Is that logical? Thanks
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Paul - 1967 Amazon 222S B20 o/d Estate & 1961 A-H Sprite Mk2 948cc WANTED - For '67 Amazon estate - offside rear quarter, preferably new old stock. |
Oct 22nd, 2009, 19:38 | #2 |
Schrödinger's Cat Cph!
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Very easy to check: (And yes, you're most likely on the right track)
Jack up the left hand wheel, by lifting it under the shock-mount - jack up wheel 'till it's free off ground - this way, you'll release all weight on the upper A-frame - and now it's easy to check for play in bushes etc.
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Oct 22nd, 2009, 21:42 | #3 |
Trader Volvo in my veins
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If it is wishbone bushes tehy will have had to worn all teh way through to make a grinding noise. Do check them but you may well need a big bar to pull enough onthem to see movment. Also check the crossmeber where the bottom wishbone bolt goes through. If that moves the crossmember is shot.
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Oct 23rd, 2009, 09:37 | #5 |
Amazoniste
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Thanks chaps - will take a look at those tomorrow. However after my drive to work this morning, I'm starting to have doubts about it not being rotational, as the noise is not a clonk or rattle.
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Paul - 1967 Amazon 222S B20 o/d Estate & 1961 A-H Sprite Mk2 948cc WANTED - For '67 Amazon estate - offside rear quarter, preferably new old stock. |
Oct 23rd, 2009, 12:59 | #6 |
VOC Member
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Is this a very short (time) graunch or does it continue for a while? Does it go away when it's wet?
I'd add the main anti roll bar bushes to the check list. |
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Oct 23rd, 2009, 13:19 | #7 |
Amazoniste
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Don't know about in the wet. It's not a short noise (i.e. like an impact of some kind) - lasts maybe a second or so.
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Paul - 1967 Amazon 222S B20 o/d Estate & 1961 A-H Sprite Mk2 948cc WANTED - For '67 Amazon estate - offside rear quarter, preferably new old stock. |
Oct 23rd, 2009, 13:56 | #8 |
Schrödinger's Cat Cph!
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Paul,
Play in front wheel bearing - the sound is from the disk adjusting itself when brakes are aplied.. Or you do have something wrong with brake pads - some play or lose pad.. Don't gamble to much on the way home from work..
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Oct 23rd, 2009, 14:58 | #9 |
Amazoniste
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Now that makes a lot of sense. The front wheel bearings were all new at the beginning of August, and unusually for me, I haven't used the car much since then. There's no rumbling / roughness when spinning the wheel, so if it's the bearings, presumably it's just the torque figure on the centre nut(s) that needs checking & tightening as appropriate?
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Paul - 1967 Amazon 222S B20 o/d Estate & 1961 A-H Sprite Mk2 948cc WANTED - For '67 Amazon estate - offside rear quarter, preferably new old stock. |
Oct 23rd, 2009, 15:36 | #10 |
Schrödinger's Cat Cph!
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Sounds right, yes.. And as I sad in first answer - jack it up as described - this way you'll have no weight (other than wheel itself) on the system - and therefore easy to spot even tiny play's/faults etc. (Don't caunt on a simple spin of the wheel - it could be, that only under 'heavy' load/braking that the micro-play reveals itself).
Volvo Service Manual on Part 6 Front end, has all details of torque etc. you need.
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