Rod knock or Main bearing knock?

[redyarisgirl]

Hi, I have an 08 Y and everything has been great up until about 10 days ago. I noticed a "high pitch" zing type noise, sort of random.. whether in Gear, Neutral, Reverse, etc. Now it has gone to a steady knocking, and yesterday for the first time, I could feel the knocking in the shifter. I have an appt with my Dealer,... who thought it might be the Alternator or Water Pump? I have been reading about the Alternator.. and doesn't seem at all what it is.... and the Water Pump.... I don't think so either (but what do I know) lol

Anyways... let the GONG begin

[Flipper_1938]

My wife's 05 corolla has made a similar noise since shortly after new. It hasn't changed in the last 150,000 miles.

[bronsin]

Originally Posted by redyarisgirl

Hi, I have an 08 Y and everything has been great up until about 10 days ago. I noticed a "high pitch" zing type noise, sort of random.. whether in Gear, Neutral, Reverse, etc. Now it has gone to a steady knocking, and yesterday for the first time, I could feel the knocking in the shifter. I have an appt with my Dealer,... who thought it might be the Alternator or Water Pump? I have been reading about the Alternator.. and doesn't seem at all what it is.... and the Water Pump.... I don't think so either (but what do I know) lol

Anyways... let the GONG begin

Have your mechanic take the alt/wp/ac drive belt off. With the engine stone run the engine and see if the noise goes away. Dont run it any longer than it takes for the cool enngine light to go out.

If the noise goes away its one of those components gone bad.