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-   -   REAR STRUT KNOCKING...BEST TYPE OF GREASE? (https://www.scoobynet.com/suspension-12/881008-rear-strut-knocking-best-type-of-grease.html)

jase128 23 March 2011 06:58 AM

REAR STRUT KNOCKING...BEST TYPE OF GREASE?
 
hi...i have a my05 wrx and at low speed/pulling away i get a knock/thud from one of my rear shocks,im led to believe its a common thing due to grease in strut drying up.i've been using the quick fix and greaseing under the dust boot on the strut and this works fine for a month or so..so now im gonna try the long term fix and repack the grease in the shock body,has anyone done this or know which kind of grease is best?

davedipster 23 March 2011 01:53 PM

Any multipurpose grease will do, as it's a sealed unit.
I re-packed mine, but unfortunatly the knocking means the damage is done to the top bush so a waste of time.

Do what I did,
Remove
Throw in bin
get some aftermarket struts, NOT KYB's

dipster

Tidgy 23 March 2011 01:54 PM


Originally Posted by davedipster (Post 9950289)
Any multipurpose grease will do, as it's a sealed unit.
I re-packed mine, but unfortunatly the knocking means the damage is done to the top bush so a waste of time.

Do what I did,
Remove
Throw in bin
get some aftermarket struts, NOT KYB's

dipster


had kyb adjustables on my classic for 5 years now, awesome bit of kit. why so anti them?

DT-SPD 23 March 2011 07:56 PM

As a preventative measure I have repacked my rear struts and fitted grease nipples. Its quite an easy job, in fact the hardest part was removing the bottom nut from the strut, had to make some mods. I used Lucas Red n tacky grease HERE that I got from ebay. But to be honest any good grease will do the job. I would recommend fitting grease nipples as you can then fill the chamber between the bushings.

s70rjw 23 March 2011 10:11 PM


Originally Posted by DT-SPD (Post 9950857)
As a preventative measure I have repacked my rear struts and fitted grease nipples. Its quite an easy job, in fact the hardest part was removing the bottom nut from the strut, had to make some mods. I used Lucas Red n tacky grease HERE that I got from ebay. But to be honest any good grease will do the job. I would recommend fitting grease nipples as you can then fill the chamber between the bushings.

How long did it take you to do ?
Are they silent again?
Mine are silent again after a good spray of white lithium grease

DT-SPD 23 March 2011 10:45 PM

Took a good 2 hours a side but I did have trouble with the bottom nuts and I cleaned up the struts and painted them etc. It turns out that they were not the source of the noise I had ( car needed new outrigger bushes ) but at least I now know that they are not going to start knocking as they are packed full of grease.

Rich 300 23 March 2011 11:21 PM


Originally Posted by Tidgy (Post 9950291)
had kyb adjustables on my classic for 5 years now, awesome bit of kit. why so anti them?


KYB are the oem supplier, iirc

davedipster 24 March 2011 08:56 AM

As above, KYB make the dreadful std shocks.

dipster

Tidgy 24 March 2011 10:44 AM

ahh that makes sence, yeah the standard shocks are kyb, but there pretty crap lol

the uprated ones are much much better.

s70rjw 25 March 2011 08:58 PM


Originally Posted by DT-SPD (Post 9951253)
Took a good 2 hours a side but I did have trouble with the bottom nuts and I cleaned up the struts and painted them etc. It turns out that they were not the source of the noise I had ( car needed new outrigger bushes ) but at least I now know that they are not going to start knocking as they are packed full of grease.

Did you replace with OE or uprated items. If so what did you use, from where and how much. Thanks Bob

DT-SPD 26 March 2011 01:06 AM


Originally Posted by s70rjw (Post 9954157)
Did you replace with OE or uprated items. If so what did you use, from where and how much. Thanks Bob

The outrigger bushes ??

I used PowerFlex items, about £20 each from ebay, PFR69-124 here http://cgi.ebay.co.uk/POWERFLEX-BUSH...item45f32d041d and PFR69-118 from the same seller.

Quite a big job to fit, cost me £260

wrx sti ppp 26 March 2011 10:51 AM


Originally Posted by s70rjw (Post 9951192)
Mine are silent again after a good spray of white lithium grease

:thumb: white lithium grease as a temp fix.

Arch 29 March 2011 01:50 PM


Originally Posted by DT-SPD (Post 9950857)
As a preventative measure I have repacked my rear struts and fitted grease nipples. Its quite an easy job, in fact the hardest part was removing the bottom nut from the strut, had to make some mods. I used Lucas Red n tacky grease HERE that I got from ebay. But to be honest any good grease will do the job. I would recommend fitting grease nipples as you can then fill the chamber between the bushings.

Can you post some pics of exactly where you put the grease nipples, interested in this.

DT-SPD 29 March 2011 10:23 PM


Originally Posted by Arch (Post 9960256)
Can you post some pics of exactly where you put the grease nipples, interested in this.

I followed a process I found online here http://forums.nasioc.com/forums/show....php?t=1911692

Here are some pics, one is of the finished struts ( you can see the grease nipples ) and the other is the mod I made to help me to undo the lower nut.


http://members.multimania.co.uk/dant...rearstruts.jpg

http://members.multimania.co.uk/dant...tbottomnut.jpg

davedipster 31 March 2011 12:47 PM

fitting grease nipples is not the best idea, over time the lower part of the shock cavity could become overfilled with grease and with nowhere for the grease to go this will become an issue preventing the shock compressing.

dipster

DT-SPD 31 March 2011 03:56 PM


Originally Posted by davedipster (Post 9963785)
fitting grease nipples is not the best idea, over time the lower part of the shock cavity could become overfilled with grease and with nowhere for the grease to go this will become an issue preventing the shock compressing.

dipster

Its almost impossible to overfill with grease as it is only injected between the upper and lower bushes. When this chamber is full no more grease can be injected ( not using a handheld grease gun at least ). Worst case is that grease goes past the lower bushing over time, however the clearance between the damper and the tube it runs in is plenty big enough for any stray grease to simply pass over the damper as it moves down. As the damper then moves back up the lower bush will simply wipe the grease back into the lower chamber.

budgie smuggler 30 May 2011 11:16 PM

So what's the cause of the noise i have it on my rear passenger strut is it one of the bushes on the top mount is that all that needs replaced.Mine goes up and down ok and stays in position just want to get rid of noise can i do that by replacing a bush in the mount.:thumb:

fpan 31 May 2011 08:53 AM

Having spoken to a Subaru specialist, the rear struts knocking happening when you start moving from stationary doesn't really affects the car's handling but it can be annoying I suppose.


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