87 My suspension groans when I go over a speed bump/other bumps?
Description
This article is from the VW Technical FAQ, by with numerous contributions by Jan Vandenbrande others.
87 My suspension groans when I go over a speed bump/other bumps?
A: Check for squeaky muffler hangers, and sway bar bushing!
Squeeky Muffler hangers sounds like: eee-eee-eee as you drive along.
Sway bar bushings squeek when you go over a bump slowly, e.g.,
a speed bump. It sounds like: eeee--aaaa, eeee-aaaa.
Start with Si-spray. It usually cures the noise temporarily,
but at least you will be able to identify where the noise is
coming from.
For a more permanent sway-bar bushing noise solution, especially
if you have an aftermarket sway bar with polyurethane bushings:
try the following:
1) Check the alignment of all the components.
2) Relube the bushings with a Silicone-Teflon grease.
APS's sway bars now come with this grease and it works fairly well.
3) Here is a trick that I have not tried as yet: Score the bushings
with coarse sand paper or fine saw. This will leave little
indents where the grease can settle rather than squeezed out when
you reassemble the bushings.
The same tricks can be used for other rubber based suspension components
(e.g., A-arm bushings).
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