Antifreeze Question

[wrongturninwv]

Need to drain and change mine on a 95 Impreza 1.8 but can not find drain plugs for block. Is it ok just to warm car up with heater on till temp goes up turn off and wait a few min then pull bottom hose and drain from there ??? And it gets pretty cold up here so how much Presstone would I use To be safe ??? Thanks

[1 Lucky Texan]

Need to drain and change mine on a 95 Impreza 1.8 but can not find drain plugs for block. Is it ok just to warm car up with heater on till temp goes up turn off and wait a few min then pull bottom hose and drain from there ??? And it gets pretty cold up here so how much Presstone would I use To be safe ??? Thanks

 

Probably any way to get the majority of the fluid out is OK. Search for low silicate AF. Subaru and many foreign cars call for it - something about waterpumps/aluminum rads. (also available at the dealership I'm sure)

 

I doubt much over a 60-40 mix will buy you anything, there's sometimes a chart on the back of the bottle.

 

Also! search this site for refilling procedure. Not sure on your engine specifically, but many soobs need a little xtra help getting the air out of the coolant system - otherwise you can get localized boiling/warped heads/blown gaskets,etc.

[NoahDL88]

the EJ's are finicky when it comes to coolant RnR, make sure you burp it or it will over heat.

[NOMAD327]

They tend to drain a bit better aimed downhill, and fill a bit better aimed uphill. I always did it on level ground without any problems though. I pull the thermostat to get a pretty good block drain. (it's a good idea to replace the thermostat anyway, use only a Subaru one). The trick for a painless refill, is to put a few quarts of new mix into the radiator, and then remove the upper radiator hose at the radiator. Now pour mixture down the hose into the top of the engine. When the hose is full, install and tighten it and then top off the radiator. You will get at least a 90% fill in this manner, and the cylinder heads and block will be adequately filled for the initial heat up. After the thermostat has opened on heatup, it will be possible to add a bit more to top it all off. There is a screw in vent plug on top of the radiator on the passenger side, but I have never needed to use it.

[Bill90Loyale]

http://www.ultimatesubaru.org/forum/showthread.php?t=39838&highlight=drain+plugs

[Commuter]

I like the approach of flushing the system a couple of times with water. Do it 2 or 3 times until the water is clear. Use distilled water. Then drain and fill with the right amount of 100% anti-freeze. That is... (and I don't recall the exact numbers) say the system holds 6L. About 2 will be left in the system (~100% distilled water). Put in 3L of 100% anti-freeze for a 50/50 mix. Top up whatever is remaining with distilled water. Good to go.

 

Personally, I prefer the long life stuff (Havoline, not GM Dexcool). You will not have a problem if you fully flush out the old stuff. The problem people run into with sludge and stuff is because they don't get enough of the old stuff out. I don't know about this new Prestone stuff that mixes with anything. Not sure what they are doing there.

 

Careful with disposal. Anti-freeze is not good for the enviornment and just a little bit can kill a pet.

 

Commuter.

[Setright]

I like this one

 

http://www.ultimatesubaru.org/forum/showthread.php?t=21681&highlight=coolant