Engine/Transmission (1994 - 1998) Radiator/coolint making noise

[TNTNANCE]

when rpm picks up. noise comes from heater,like rushing water.

and then air with it . replaced thermostat and getting ready to replace

a flowrestricter elbow.

I also have antifreeze spraying from overflow tube and heater does not

get very hot.



twin turbos,370 inj,and many more!

 

[tgordon]

Is it just when you start or all the time? My truck does it when I start it after the block heater has been plugged in. One of the guys I work with said that was because of the heating with out flowing, but all I know is that it does not do it during the summer. My other guess is have you ever changed/backflushed the cooling system? My father never did and his chevy had the same symptoms and the heater core had scale build-up so tight we could hardly get anything to flow through it.



just my . 02 worth of ideas on it



Troy

 

[TNTNANCE]

yes it does it all the time . at first just when it was cold and on start up only .

now it just keeps gettig worse. now it makes a whistling noise sometimes.

 

[bdcraig]

Mine had the same rushing water sound and lack of heat untill I put a new heater core in. It returned when the head gsk started leaking and allowed air into the system. Put new head gsk on it and it is back to no noise.

 

[TNTNANCE]

do you think head gsk is blowen, because I dont see oil and antifreeze mixing.

oil is at same level and so is antifreeze

 

[Signal73]

it could be from a small leak in one of the hoses supplying the heater core also. Its loosing vaccum and filling with air.