Water Pump-Join In The Fun
 

Well, after reading several postings about 5.7L water pump failures I guess my '99 Tahoe is stepping up to the plate also. 111K miles and been seeping some for last week or two. I had looked it over and could not really tell if it was the pump or another problem so took it in and had it pressure tested. Yep, you need a w/pump Bud. Now I'm thinking would be a great time to ditch the pink Dex-Cool and go back to the ol' green stuff I've used for years. Thinking to flush and re-fill with the green, replace upper and lower radiator hoses, new 195 degreee thermostat and re-useable gasket. Do the drain and flush before the new pump install and any recommendations of a flush kit? Haven't had to use one for years, most likely have changed since the last flush kit I bought. Any thoughts much appreciated as this is Momma's ride and we all know "If Momma ain't happy, ain't nobody happy!"

Re: Water Pump-Join In The Fun
 

Someone help him keep Momma happy...TTT

Re: Water Pump-Join In The Fun
 

I always just take a garden hose in every opening until they all run clear. This includes flushing the rad top to bottom, take out T-stat and water top to bottom in engine and then remove the heater hoses and flush the heater core. Then make sure everything is drained and refill with a 50/50 mix. No problem so far for me using this method.

Re: Water Pump-Join In The Fun
 

Thexton has an adapter (#356IIRC) for your garden hose to go into heater hoses. remove stat and reinstall housing, remove one heater hose, place adaptor into hose, attach a 4' length to nipple, flush into container until it comes clear. drain radiator and block. the block has 2 plugs. one on driver's side (9/16 swivel) and knock sensor on pass. side (7/8 deep socket). make sure the knock sensor get torqued to 15 foot lbs. refill with 50/50. then 3 months later get angry about intake gaskets leaking coolant. LOL

Re: Water Pump-Join In The Fun
 

Well the water pump, thermostat and coolant change has been accomplished. Now, hopefully the intake gasket likes the new coolant and doesn't give problems. Time will tell. :chevy: