Suddenly my heater was not getting hot so I checked for blockage of the heater core and hoses and they were all clear. So I pulled the heater hose off from the water pump then the intake connection and was surprised that it seemed not to shot water out with the engine running with any force just a dribble . Need help, why isn't the pump blowing out water at the intake hose connection ?
-
-
Re: C1Water pump pressure
Roy,
The only thing that comes to mind other than an impeller failure, is that the thermostat is either failed wide open or is missing all together. Without the restriction in the thermostat the pressure at the intake fitting would be very low indeed. I presume that the engine is not running hot, so you can rule out the water pump impeller and a collapsed lower radiator hose. If you have a good flow into the top tank from the upper hose, it must be the Thermostat.
Regards, John McGraw -
Re: C1Water pump pressure
I've seen all manner of 'funnies' over the years including engine block water jacket 'crud' that's rusted free and migrated finding a 'home' in the water pump's outlet passage! About the only way to really get to the bottom is to pull the pump, disassemble and inspect. Not the most 'fun' job on a C1 considering its Rube Goldberg motor mount technique, but there ARE short cut methods including building a 'saddle' to jack & support from below as well as building special 'holders' (chop the heads off intake bolts and cut slots in the ends for installation/removal with a conventional slot-head screw driver) to replace existing water pump bolts one-by-one and pry, slide, wiggle the water pump forward and off the engine with the 'holder' bolts maintaining front motor mount support....Comment
-
Re: C1Water pump pressure
Jack thanks for your in-put . The engine never gets hot, I even drove it to N.Y and back.Comment
-
Re: C1Water pump pressure
Hey Roy,
Did I read your post right that it is the fitting on the intake manifold that does not seem to be putting out much pressure?
Regards, John McGrawComment
-
Re: C1Water pump pressure john
Yes neather the intake or pump out letComment
-
Re: C1Water pump pressure john
Roy,
My only thoughts are that the pump nipple would have no pressure since it is on the suction side of the pump and would normally operate at a negative suction head pressure anyway. This brings us back to the intake nipple, and if the nipple is not clogged then it almost has to be the thermostat or lack thereof. A substantial restriction would be necessary in the t-stat neck to asure good flow through the heater. When the t-stat is closed the flow rate is much more than when open and a missing t-stat would make for almost no flow. Keep in mind that since the suction probably is operating at a negative pressure it is not necessary for the intake nipple to have much pressure since what is really important is the difference between the two ports and not what pressure they have as compared to the atmosphere.
Regards, John McGrawComment
-
Re: Thanks John *NM*
Comment
Comment