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Ask Toyota Service Your Own Question
Toyota Service
Toyota Service, Toyota Expert
Category: Toyota
Satisfied Customers: 4819
Experience:  30+ Yrs of auto experience, Award Winning Svc. Manager; Just Answer Customer's Choice Award Winner
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It sounds like marbles in a tin can in the front right hand

Customer Question

It sounds like marbles in a tin can in the front right hand side
JA: What is the model/year of your Toyota?
Customer: 1999 Toyota Corolla
JA: Are you fixing your Corolla yourself? What have you tried so far?
Customer: Just some spray on the belt and was going to replace the pully.
JA: Which belt are you dealing with? And have you changed one before?
Customer: The surpentine belt and no I have not replaced one
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 9 months ago.
Category: Toyota
Customer: replied 9 months ago.
I'm not sure if the noise is coming from the engine or the pully
Expert:  Toyota Service replied 9 months ago.

Hello. Welcome to Just Answer. Please allow me to assist you. A 'marbles in a tin can sound' can be one of two problems:

1) the belt pulley could have worn out bearings

2) the water pump impeller shaft bearings may be worn out.

The easiest way to determine this is via a mechanic's stethoscope. Or a long metal rod. Taking care to not touch the rod to the moving parts when the engine is running, touch the scope probe (or the end of the long rod) to the pulley bracket and listen to the 'scope or place the other end of the long rod to your ear. The noise will transmit thru the probe or the rod to your ear. If the pulley is not noisy, touch close to the water pump where it meets the block, again being careful to not touch the moving belt. If the water pump is bad, it will be very easy to tell via the rod or the 'scope. If you are not careful here, your rod or scope will get caught in the belt and this could be dangerous. If you are not comfortable with the recommended diagnosis, a trip to a shop will be in order. It will only take them 5 minutes for this diagnosis.

Expert:  Toyota Service replied 9 months ago.

If you have any questions, please feel free to reply. Please do confirm that you have received my input. Thanks.