HT4100 4.1, 4.5, 4.9 Discussion, Water pumps...Generally speaking. in Cadillac Engine Technical Discussion; Generally speaking and on average from experience, What have any of you here seen as to about how long the ...
Automobile(s): Cadillac 1993 Deville 4.9, 1991 Eldorado Touring Coupe
Water pumps...Generally speaking.
Generally speaking and on average from experience, What have any of you here seen as to about how long the life span is of O.E. water pump on the 4.9?
My 1993 Deville was dripping some coolant where it collected around the bottom of the radiator mount frame on the fill cap side.
I looked around and saw no leak from overflow tube, No leak from cap or any of the hoses or lines to the radiator. Sipe panel of radiator on cap side was a little wet but cant see any cracks. Was wondering if the water pump may be starting to pass coolant and it whipped it on to the radiator where it was wet. My radiator was down about a pint after always being neck full when i checked. overflow bottle empty also.
On my 1993 Eldorado (4.9L), the OE water pump lasted 90k, the Napa Reman water pump lasted 100k.
I've found the best way to find a leak is by using a coolant system pressurizer. Simply hand pump the system to 15psi w/ the engine off and look for leaks....better yet, listen for bubbling. I've found everything from loose hose clamps to loose water pump bolts to a slight crack in the radiator by the trans cooler inlet. The pressurizer can be borrowed from AutoZone for $75....the $75 is returned when you return the tool to the store.
is there alot of serpentine noise with a bad water pump? I cant determine if my noise is related to power steering pump or water pump . I already replaced the belt tensor and second idler wheel. Spun the power steering and water pump without the belt and couldnt tell if they were bad.