22 replies to this topic

[buzzda]

Hey guys, I'm trying to get rid of the "waterfall feature" that installed itself when I changed the turbos. I've got the front end jacked right up, eng is cold, just wondering if I should have the cap on the header tank on or off when I do the 2-3K warm up?? Workshop manual says to have it on but when looking round the forums everyone says that having it off is the best way. So, on or off? Cheers.

[Alex]

Off. You don't want to pressurise the cooling system, as that will trap more air. Also, it'll give you a rather warm and invigorating green shower when you take the cap off after it has reached operating temperature. Best avoid those. First and second degree burns aren't much fun. Make sure the fans come on for at least three cycles (AC off, of course.) Don't forget to switch the heater on to max. Some argue against this, as it isn't necessary... Won't hurt you to have it on though, and every Subaru mechanic I've seen do it.

[buzzda]

Cool, thanks mate.

[alexGT]

Cool, thanks mate.

also try sticking it on an incline (driveway) can also help out.

[buzzda]

Ta, I had it on stands at the front (my drive's flat). Fingers crossed in the morning all will be good.

[Aaron.W]

have the heater full on hot to open the heater tap you dont need to have the heater fan on but i always do just for good measure and to make sure the heater is working nicely

[RX25SE]

.......and open the bleed nipple at the top of the radiator. (B4's have them dont they???)

[buzzda]

Nah mate, header tank cap and o/flow bottle are the only openings.

This is the method I've used this time (copied & pasted from "Reggy", RSLC)

Ok
tried and tested way of removing air pockets

Jack front of car up undo radiator cap

fill with coolant water untill its full

start car and run for 2 cycles of thermo fans comming on with heater on hot fan flat out

turn car off leave for 3-4 hours or overnight

next morning adjust coolant level

run car for 2 cycles of thermo fans again with heater & fans on

Radiator cap on then drive

should solve any air pockets

very very time consuming but it works ever time u have that persistent pocket

[B4TT]

Subaru cooling systems = a disgusting joke. I hate changing the coolant in mine, pain the ass - but what the guys have said is about the only way to get it right - persistence. Mine has a habbit of trapping air around the thermostat which means I often get boilage/coolant start to spit out before the thermo's cut in.. right pain in the ass when that happens. BTW if you are standing at the front of the car, look to your right of the engine and you will see a black rubber cap, this is also a bleeder nipple that you can use while initially filling the coolant.

[Delete This Account]

I had the waterfall feature installed about a month ago, but mine was an easy fix. Found one of the little hose clamps had slipped off and it was letting coolant out/air in. Removed Subaru's useless little clamp and added a decent one, problem solvered. What this has to do with your problem, i don't know.

[buzzda]

Did you do anything to get the air out Waltzy? or did it rectumfy itself?

BTW if you are standing at the front of the car, look to your right of the engine and you will see a black rubber cap, this is also a bleeder nipple that you can use while initially filling the coolant.

Behind the dipstick? (the oil one... of course it's in front of the one standing in front of the car ).

[Delete This Account]

Did you do anything to get the air out Waltzy? or did it rectumfy itself?

Not really, took the cap off and bashed the header tank a couple of times.

No waterfall since.

[buzzda]

Lol, Waltsy and his hammer!!

[Delete This Account]

Lol, Waltsy and his hammer!!

I showed it who's boss.

[buzzda]

Hahaha. Think it's fixed... I let it cool down, just started it then and no waterfall

[Alex]

Hahaha.


Think it's fixed... I let it cool down, just started it then and no waterfall

Wait a couple of days

Usually waterfall happened to me after restarting a warm engine.

[legacy rsk]

Subaru cooling systems = a disgusting joke.

I hate changing the coolant in mine, pain the ass - but what the guys have said is about the only way to get it right - persistence.
Mine has a habbit of trapping air around the thermostat which means I often get boilage/coolant start to spit out before the thermo's cut in.. right pain in the ass when that happens.

BTW if you are standing at the front of the car, look to your right of the engine and you will see a black rubber cap, this is also a bleeder nipple that you can use while initially filling the coolant.

never had a problem with my cooling system. i use a 2 ltr drink bottle with the bottom chopped off and pour the coolant into that

[Delete This Account]

I use a 2 ltr drink bottle with the bottom chopped off and pour the coolant into that

Then do you drink it?



I don't get it...

[buzzda]

I'd say he's using it as a funnel... I'm just wondering if it would screw into the header tank (or fit tight enough) to prevent overflow.

[Delete This Account]

I'm just wondering if it would screw into the header tank to prevent overflow.

Then you would need exactly the right amount, if you had too much it would spill everywhere when you unscrew it