coolant flush
03-10-2010, 03:14 PM
#1
2nd Gear Member
Thread Starter
Join Date: Oct 2005
Location: south jersey
Posts: 425
coolant flush
can anyone tell me exactly where the drains on the block are i flushed my radiator last weekend and couldnt find them. I want to flush my whole system this weekend. thanks
03-10-2010, 05:32 PM
#2
4th Gear Member
Join Date: Jul 2008
Location: NC
Posts: 1,956
1999-2004 Mustangs do not have a coolant drain on the block. You either have to buy a backflush kit from walmart or an auto store. Or you simply have to drain, refill, run, drain, refill, run, etc until everything in the block has been cycled through. I took the time to do it this way and although it takes forever its all idle time so while you are running it or draining it you can go on about doing other things. I took a nice day last Spring to do lawn work/outside work all day while I kept the flush process going.
03-10-2010, 08:09 PM
#4
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Join Date: Jul 2008
Location: NC
Posts: 1,956
Yes thats fine I just ran a hose straight to my overflow tank....I never added coolant until my final two refill and flushes. If you just add it on top of the last refill you end up with very little coolant in terms of mixture. I recommend just leaving the radiator drain plug open and running water through it for about a minute or so on the first drain. Do not forget to bleed your coolant system of air pockets after this.
03-11-2010, 01:00 PM
#7
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Join Date: Jul 2008
Location: NC
Posts: 1,956
Thats a good question actually, i've never had the heads off of my car. But it doesnt make sense to me to design heads with such a potential for disaster like that. I've never heard of anybody here saying that was a particular issue when removing heads. Theres plenty of guys around here that can answer this for you confidently but i'm just not positive.
03-12-2010, 10:55 AM
#9
4th Gear Member
Join Date: Jul 2008
Location: NC
Posts: 1,956
Once you're done flushing fill her up, leave the overflow tank cap OFF and start the engine. Let it idle until the radiator fan clicks over. This usually takes about 30 minutes if the engine was cold to start with. The air bubbles will work themselves out as it idles. Once the fan clicks over your system is bled. Put the cap back on and test drive.
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