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Discussion Starter #1
Just after I've pretty much figured out my cooling system problems on the suburban the sierra decides to act up. When I shut the truck off or when it is idling, I notice a substantial leak coming from what looks t be just behind the serpentine belt/pulleys. If it is shut off the liquid seems to run down the back of the center pulley and onto the ground. The Upper hose and thermostat look to be fine as does the bottom hose (at least what I could see of it). Any ideas why it may be leaking??? :neutral: It's a 99 old body style 5.7 vortec.
 

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what color is the liquid? if its orange its coolant....it might be coming from your water pump... I just had to replace mine it did the same thing..... check that out... it was only like 150 for parts and labor but you could prob do it yourself.... however if it is a water pump i suggest buying a high flow one from edelbrock.. they are like 150 but they will lower your engine temperatures substantially
 

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Discussion Starter #3
damnit pete your a genius! yeah its orange coming out and I didnt even think about the water pump. Thanks.
 

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I love it, members helping members! BOO-YAA. :great:
 

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if you are replacing the pump why not the thermastate as well. i run a stock flow pump but drop the therm to 172 or i like the 160 degree and not worry about it. and not to add to the pain but if the pump is on the way out i bet you are ready for new upper and lower raditor hoses and heater hoses and do not forget a new raditor cap. all can be swapped for the added cost of the high flow water pump but for a street drive beast and some towing you not have any issues. i hate to swap out a part to have a hose fail the next month. you will hear some say do not drop the thermastate temp but it added 3MPG to my beast (and does on most vehicles i do this to) and makes him feel more peppy. i still tow and run Brutis hard and now the tem guage stays on the 1st quarter of the guage arounf 120-160 on real hot days and with the ac running......mike
 

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yeah my truck is from georgia now living in CT and already stays in that first quarter. I'm pretty sure someone already switched out the thermostat before I got it. I'll check the hoses and cap though. Has anyone ever done a water pump before on this engine? what's involved? Thanks for all the help so far. :great:
 

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yeah my truck is from georgia now living in CT and already stays in that first quarter. I'm pretty sure someone already switched out the thermostat before I got it. I'll check the hoses and cap though. Has anyone ever done a water pump before on this engine? what's involved? Thanks for all the help so far. :great:

Sure doesn`t hurt to have or borrow that special wrench to get the fan off. I have used a chisel and hammer but the wrench would be easier. With a small deposit O`Reilly`s may have one that you could borrow for a few hours that is if theres a store close by.
 

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glad i could help!!
 
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