[caroholic1]

Guys 5-6 days back i got a new set of wheel caps for my santro. Now,
after i got them installed the next morning when i was going to delhi
whenever i pressed the brakes i noticed a sound coming from my rear
wheels. So, what sound can this be guys? But guys after commuting 5-6kms
the sound disappears. So, after 2 days of getting those wheelcaps
installed i took my car to a local mechanic & he told me that it was
mainly because my rear wheelcap was not tight enough. But guys even
after that the sound from my rear wheels is still coming.
Please suggest me experts what should i do to get rid of this problem?
Is it because of the wheelcaps or something else? According to the
local mechanic this sound must be coming before also but i noticed it
only after i got this new set of wheelcaps.
Here's the pic of the wheelcap

[headers]

what is the kind of sound you hear..humming / squeaking / ???

[caroholic1]

Originally Posted by headers

what is the kind of sound you hear..humming / squeaking / ???

As if something is touching the rear wheels(only when i apply the brakes).

[SLK]

i *think* ... its nothing but the rear drum brakes... this happens if the rear brake system is too old and not serviced... or at times could be b'coz of rainy season (this one will disappear everytime after a few kms of driving)

[sumitkalindi]

Is the area you park your car has waterlogging problem??

[gr8guzzler]

Just remove the wheelcaps and drive for a while. This way you can be sure whether the problem is of the wheelcaps or something else...

[Ram]

Without hearing the sound, nor its exact description from you, it's difficult to trouble-shoot.

Nevertheless, let me take a shot at it:

1) If the lip of the steelwheel is a little out-of-round or dinged, the plastic wheel cover will not make contact with it uniformly. There can thus be periodic friction between edge of the plastic wheel cover and the wheel, which will make a squawking sound, better heard when you drive parallel to a stone wall with your windows rolled down.

2) As my other friends, SLK and sumitkalindi suspect, there may be a little rust on the drum inner surface due to driving through a few inches of water. This rust which dries after standing overnight will cause a metal-against-metal squeal, until repeated use of the brakes causes the brake-shoes to wear away the rust and gives you a bright metal surface inside the drum.

Another thing, your car wash man may be washing your wheels with a garden-hose.
Sometimes they even throw the last litres of spent water at the wheel. That water can find its way into the drum and cause a fine layer of rust.

Ram

[sajo]

A few days ago, my 800 was also emitting a sort of "whoop whoop whoop..." sound from the driver side rear wheel. It dissappeared when I applied the brakes.The friendly neighbourhood mechanic said problem was due to a brake liner with lots of dirt. The problem went away on cleaning.

[caroholic1]

Originally Posted by gr8guzzler

Just remove the wheelcaps and drive for a while. This way you can be sure whether the problem is of the wheelcaps or something else...

I went to the wheelcap guy & asked him to do that but he gave a complete check to the wheelcaps again & checked it whether they are completely tight or not & told me that its mainly because of the monsoons.

@ Sumitkalindi- No buddy the area where i park the car does'nt have a waterlogging problem.

[caroholic1]

Originally Posted by ram

Another thing, your car wash man may be washing your wheels with a garden-hose.
Sometimes they even throw the last litres of spent water at the wheel. That water can find its way into the drum and cause a fine layer of rust.

Ram

I saw him doing that once .