jujofields

Personally, I always use distilled water....but, as mentioned before, as long as the tap water you used isn't well water and is clean & drinkable, I think you should be fine. Not to mention your car is better off now with tap water & Dex than before you flushed the system!

Grimes

iTrader: (3)

Exactly, depends on the water in your area. If your tub and sink are always full of hard water deposits, then you should not use that tap water in your car. Luckily, my town has nice water, lol.

Sharpe

iTrader: (7)

People run distilled water in their radiators? Huh. New to me.

vtirocz

Deposits in tap water can cause abrasive wear on the waterpump shaft seal. To be safe, I would use distilled water.

99monguse

Have any of you had issues with your waterpumps going out right after a coolant flush? I am reading all these posts about you guys flushing your cooling systems and yet when I did mine on my 98 Z28; the waterpump took a **** like a couple days later. I have heard the Dexcool may have caused it; what do you all think?

Grimes

iTrader: (3)

I know I am just one case, but I flush my coolant every year, fill w/ 50/50 mix of dexcool and tapwater, and my pump has been fine for the last 100,000 miles, lol.

LS6427

iTrader: (2)

Never heard of that. I've flushed my system about 10 times, plus when my engine was removed twice the coolant was drained, and when I changed my radiator because it cracked once it was drained, and a couple condensor cleaning days the coolant was drained......and its my original factory water pump from 1998, still good.

Dave 96TA

iTrader: (10)

There's a thread of people saying their pump died almost right at 100k. I know mine did. It might just be a coincidence that they're flushing the cooling system at the second interval (50k + 50k) and hitting that 100k mark.

koolaid_kid

iTrader: (21)

There is a actually a class lawsuit going on about Dexicrap, which is why I will never use it again. GFGI.
However, AFA coolant, I have run distilled water since destroying a radiator on my RM125 in 1981 with chemical reactions (used city water at the time, not well water). Distilled water = No chemicals, no minerals. Other water, where are the dice?
I will flush it with tap water, but always rinse all that out with distilled water b/f starting to fill the system. Distilled water is inexpensive compared to an engine or cooling system rebuild. And they make coolant that claims to be Dexi compatible without all the Dexi issues.