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Knocking Noise Detected (Eventually Decided to Jack the van up)

19K views 25 replies 8 participants last post by  Andy Birks  
#1 · (Edited)
Well after having my Febi Bilstein Top Strut mouts lying in the back of the van for about 6 months and putting up with a knocking noise for about a year lol, I decided to finally jack up the van, investigate and fitted one top strut mount whilst i was there.

Top Strut Mount fitting was quite easy, didn't bother taking photo's as theres already a good guide for it on here. But as a quick note for torque settings (fresh from memory, I hope lol but please correct if my memorys incorrect)

Also to note, the bearing fits the smoother side facing up, where the spacer sits on.

Hub to Strut Nuts (The Splined ones) - 180nm
Top Piston Nut (The one that sits on top of the spacer which is on top of the bearing) 60nm
Drop Link Nut 44nm
Wheel Bolts - Sorry I forgot, my memory isn't that good then haha, but off top of my head was 108nm or 130nm?
The top nut that holds the top of the strut to the bodywork, does not have a torque setting in my Haynes, but I tightened it by a spanner and holding the center with the allen key, till it stopped, and used the other side as reference to how many threads were sticking through the nut.

The problem I encountered is the splined bolts, after removing them, have lost there "splinedness" Either the bolts, or the carrier, I'm not sure which. As my nuts were not nyloc nuts from factory, I just re used them.

Im hoping that being splined anymore isn't going to cause any bother down the line, as most other struts that have 2 bolts going through in this assembly are just standard nuts and bolts anyways. Time willl tell lol.

Anyways whilst the front end was up, both wheels dangling, I decided to check for my knocking. Anti Roll Bar bushes need replacing, as theres freeplay there and can get a knocking just by hand, and on the other side that I didn't do the Top strut mount, the drop link has also gone. This is the reason I decided to leave that other side till I pick a pair of drop links up, so I can kill 2 birds with one stone.

I've ordered the Poly bushes for the anti roll bar, as decided they will probably last longer, and worth the bit extra money. Anyone used them? and can recommend them over the rubber bushes?

I must admit, my steering feels better after just replacing the one top strut mount, mine were sticking through by about an inch lol. The old one I took out, had rubbed away at the rubber doughnut mount, and the bearing itself was quite gritty and not smooth anymore. Can't wait to get the otherside done, with new bushes and drop links, will feel like a new van lol.

One thing I did notice whilst under there was the driveshaft oil seals. Although there was none leaking out as such, nor any dripped anywhere, they seemed shiny/damp. However the gearbox last year was recon'd so wonder if its just possibly where the driveshafts were removed and some spilliage, but definately something Im gonna keep a eye on, and maybes replace when I do a gearbox oil change next summer. (2 years since box recon'd)
 
#22 ·
yeah i followed the seam to cut (same location as the split on the original) as had to split just the o/s. Yes ben only the O/S that is held in place was the only bush that was worn on mine too, hoping these poly ones will last a good long time. Ive got new Drop links to fit too, as one side was damaged, so gonna replace them as a pair on Monday when my supplier opens, but already removed the old ones so just a 2 minute job, then take for a ride. Hopefully the nice feeling :D
 
#21 ·
That knocking noise has been getting me down for a couple of years now. There WAS an advisory on one MOT for steering rack arms so I had that done thinking the knocking would go away but it didn't cure it.
A couple of weeks back I changed the drop links and ARB bushes (rubber) and it's like riding in a Roller now :)
I recommend changing those bushes even if you don't have knocking, especially if you have a few miles on the clock. For the price it's a no-brainer.
 
#20 ·
Ive just done the same as you and as you said you have to cut them first. Did you notice the line marked in them for cutting. They don't have the bit on the bottom that help locate the ARB into place until its bolted in to place either.

The ARB is a bit of a stupid design the way its only held from moving right and left on one side. The side that is held will get pounded and in the past I've swapped the bushes over as the one thats held wears on the outside quicker than the inside!

This is my first poly type bushes so lets see how they go.
 
#19 ·
Done the other side today, and whilst I was at it fitted the poly anti rolll bar bushes. Very easy to do, I removed just the one drop link, and pushed both bushes on the one side and slid one to the other side, rather than having to jack the other end up and disconnecting the drop link.

The only problem I came across, N/S just slides on and clamps down, but for some reason the O/S has a "section for the bush" where it has 2 raised edges, and then the bar recesses for the bush to sit into. The new poly bush isnt split like the rubber ones, and no matter how much force, lubrication etc I used I couldnt get it over the raised edge, So I neatly put a split in it, just like the Original bush and fitted it that way. Would be easier to do the split before sticking it on the roll bar for anyone else that fits these. If anyone fit them without putting the split in then please tell me how you managed to do it?
 
#13 ·
Yeah will do, I served my time as a mechanic when i left school but i only did my 4 year then got out of it. It's 13 year since i left so i'm a bit rusty but i still know how to get most bits done... i'm just stuck if i need a press or special tools but theres always a way!

Might just be bad habits from the garage but the only time i ever used a torque wrench was head bolts! its probably done differently now though!
 
#11 ·
Thanks for the offer Tommy but i have a couple of weeks off so i'll just do them myself, Euro car parts are showing the Febi Bilsteins for ÂŁ37 and they have them in stock so i'll try and pick some up today, i'll get two bottom ball joints as well while i'm on.

Its got a few rust spots where stone chips have never been touched up that i'm going to sort and then im looking for some nice clean silver steel wheels. Think i'll be pretty happy with it once all thats done!
 
#10 ·
I run a mobile mechanic business in the North East Stuart. If you want a quote for them done at your home then give me a pm, or search for tg mobile mechanics.
Personally I would get the Febi Bilstein ones off ebay, cheaper and better quality than local motor factors, and cheaper than the genuine ones from dealer. They do take a week or so to come as they come from Europe.

Ah I binned them mate, but still got the other side to do when my Poly bushes for the ARB come and my drop links. When I take my other side off I will photo them, but to be honest they didnt look that bad, bit of rubber dust where it has been rubbing but thats about it lol. The bearing did not feel nice and smooth anymore though.
 
#4 ·
Polly bushes are well worth the money IMO. I put a set of powerflex bushes on the rear of my vectra after one of my axle/trailing arm bushes was on its way out. Made a noticeable difference to the rear end and came with a lifetime warranty. Going to get my front D bushes done in the near future as my ARB seems to have moved to the left slightly.