E46Fanatics - View Single Post - E46 not blowing heat when stationary but getting heat when driving
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Old 12-02-2012, 10:30 AM   #35
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Join Date: Sep 2012
Location: Old Greg's Cavern
Posts: 12,797
My Ride: '13 128i STX
Originally Posted by EmFiftyFour View Post
How does a bad water pump sound? Im getting a high pitched whistle sometimes when I give it some throttle.. I know I replaced my water pump with a metal impeller (Graf) about 2 years ago.. Im also only getting heat when I rev to about 4k RPM its gonna be a cold winter.. no its not air. as a side note, due to a hole in between my head and block that shoots coolant out, i was forced to resort to a stop leak product. i was fine for about 2 years like this. looks like that crap has caught up and clogged all types of stuff up.
I thought that a whistle is usually made by a torn intake boot. It varies with RPM (airflow).
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