Hey guys,

I'm planning on changing my radiator fluid as soon as my DEI Radiator Relief gets here. I spoke to one of their reps and he suggested I also add a water pump lubricant, so I'm wondering what product you guys recommend for that?

Thanks in advance for any feedback.

R.

 

What vehicle is this on? Year, make, model.

 

its on a 02 Tahoe LT 5.3 flex fuel

 

I've always just used cheap Supertech coolant and I'm at 225k on the stock water pump. I did add some kind of coolant booster once or twice I think.

 

Get rid of the dexcool and put the cheapest green coolant u can buy in it.

 

Hey guys,
I'm due to flush and replace the coolant on my 02 Tahoe LT 5.3L.

In the manual it says to remove the cylinder block plugs and drain the coolant. Here's my question, I've looked all over the bottom of that engine and I can't find any cylinder plug. Could it be possible that my truck doesn't have them. As per the book there's supposed to be 2 of them, one on each side.

If I dont' have them, what i was planning on doing to flush the system was to drain the radiator by the drain plug, then disconnect the main radiator hose, stick the water hose in the radiator turn the water and engine on, put the heater on high and let everything flush out. Am I on track here?

Thanks guys.
R.

 

the are big plugs.. i think a 14mm allen head fits them?

but dont worry about them... ive always used the water hose trick.


and dont have to worry about the heater being turned on, its gonna circulate thru their anyway.


now for the live of me i cant rem the circulation path. .

 

ive flushed mine a few times.. filled it up and drove it for a couple days.. reflush a few more times and then put some coolant in it.



had a jeep grand cherokee i worked on for a friend one time.
we flushed then back flushed the heater core for 30 minutes to get most the crud out.
stuck the water hose in the radiator and held it at 3000rpms.
it finally started coming out clean..
then did the same thing the next weekend.

new water pump and thermostat then called it good.

 

Its a 17mm allen, and the plug is directly over your oil filter/cooler line block. You have to remove the block to access the plug. If it has a block heater, its a 24mm IIRC socket you need to turn it out. I pulled the plug and stuck a heater in my yukon last summer, and it definately drains out there.

I really wouldnt worry about it myself, just use the garden hose and flush all the crap out.

Also, I actually like dexcool. My vehicles that had been running the green stuff get all sorts of crap buildup, but the ones with dex have always been good. Then again I also end up changing it sooner than 5 years doing other work.