Archive for the ‘vw polo’ Tag

Bushes, suspension and steering


Rubber bushes are used nowadays on the majority of vehicles to isolate and dampen road noise whilst at the same time allowing suspension and steering components some flexibility and movement.

Problems begin when the bushes deteriorate or become unbonded, when this happens the suspension component is no longer retained in its correct position, excessive movement occurs and noise increases.

The above are all examples from the front suspension, the rear suspension can also have rubber bushes and mountings, again when the bush deteriorates excessive movement and noise occurs. Laguna-rear- subframe

The above image is that of a Laguna rear arm mounting bush.

Also subject to checking for excessive movement  are the rubber bushes that steering racks can be mounted with, again the criteria when being checked is is there excessive movement or is the component insecure. The image below is of a pair of new steering rack mounting bushes beside a pair of worn bushes, two pairs are needed to mount the rack in this case a 54 reg mercedes c class.c-class_steering

In the above case the steering rack was moving enough to cause the ESP light to illuminate and for the ECU to limit the power produced by the engine.

Since the 20th of this month the ESP light being illuminated is a reason for rejection (failure)

Witness marks


Often when conducting an mot I notice something before I begin to concentrate specifically on a set  of components.

Such an item were the presence of these polished spots on the subframe and driveshaft on a VW Polo as an indication or “witness” that something was amiss.

polished spots on driveshaft and subframe

Further investigation by looking at the driveshaft revealed that it was bent as you can see in the image above.  However the full extent of the distortion and runout is best shown in the following video.

Hearing the constant knocking from this area once in the roller brake tester made me question the hearing, common sense and sanity of the driver !

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