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I have a 75 nova engine inline 6 250 in my 78 chevy truck when i started it this morning there was a high pitched shrilling noise followed by a constant grinding noise while driving.Any solutions or ideas what the cause may be. The motor has 72 thousand miles on it Te noise seems to be coming from the front of the motor.
 

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floyd dunster said:
I have a 75 nova engine inline 6 250 in my 78 chevy truck when i started it this morning there was a high pitched shrilling noise followed by a constant grinding noise while driving.Any solutions or ideas what the cause may be. The motor has 72 thousand miles on it Te noise seems to be coming from the front of the motor.
My first guess would be the water pump.
 
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