how to properly flush coolant from b series?

**bennjamin** · 04-01-2009 11:53 PM

Originally Posted by Limbo

b16s in ek4s don't have them i've been looking before. Only b18s have a bleed nipple

Not true. The b18c7 does not have a bleed nipple.
the DC2 vtir , does (b18c2)

Besides , you misread what just said.Refer to what vinny said directly above.

**Limbo** · 05-01-2009 09:12 PM

yeah ok my bad, i thought the b18c7 also had it.
Ok I didn't know about the bolt to bleed.

Vinny - u stalking me man???? LOL

**destrukshn** · 05-01-2009 09:28 PM

Originally Posted by mclovin

this not only sounds dangerous to the engine but to the unskilled person that is about to reqd this and attempt to drain their cooling system while its really hot and under a lot of pressure. i wouldn't recommend this method to anyone.

just carry out the coolant fluch while it is cold as pouring cold water to into the engine may caus serious damage eg. crqcked or warped cylinder head.

now, you don't pour it back in straight away.
what happens when you bust a hose on the highway or radiator pops?
coolant pisses out everywhere anyways, while it's hot.
also, how would you get a hose and put it though the top hose, when the thermostat is closed.
another point, if you want to do it cold, take off one of the heater hoses and the bottom drain tap.
plus you don't want water sitting in your motor after you have finished flushing it out with water. then you'll just mix coolant with water.

**destrukshn** · 05-01-2009 09:31 PM

Originally Posted by vinnY

isn't this the bleed bolt ona b16? same as b18 afaik

spotted you today limbo

that is not the bleed bolt, that is the drain plug to drain the coolant out of the motor.
to bleed you system, jack your car up until your rad cap is at the highest point of the cooling system, put the lever to hot on the heater, take off the radiator cap, start the car, and let it run until the bubbles stop coming out of the top of the radiator mouth, or when the fan kicks in about twice.

**vinnY** · 05-01-2009 09:50 PM

oops got my terminology wrong, i meant drain bolt
i believe only d series had the bleed nipple where the top rad hose connects to the engine block

is there a way to completely drain the motor of cooland without removing it or is just plain bleeding and getting 90% out of it the best you can do without spending heaps of time?

**destrukshn** · 05-01-2009 09:52 PM

bleeding it is really for the air to come out.
if you do it the way i told you, you will get alot of it out.
or just do it from that bolt.
lol.

**mclovin** · 06-01-2009 05:35 PM

Originally Posted by destrukshn

now, you don't pour it back in straight away.
what happens when you bust a hose on the highway or radiator pops?
coolant pisses out everywhere anyways, while it's hot.
also, how would you get a hose and put it though the top hose, when the thermostat is closed.
another point, if you want to do it cold, take off one of the heater hoses and the bottom drain tap.
plus you don't want water sitting in your motor after you have finished flushing it out with water. then you'll just mix coolant with water.

i wasn't saying that any of the above was entirely wrong but my point was that for an inexperienced person to just stumble upon this thread and read that you can just change coolant while hot wothout taking pre cautions it could be dangerous.

now a busted rad hose or rad u cant help. so ofcourse u have to work on it hot if u can or just get the thing towed if its on the side of the road.

and some coolant u mix with water anyways, thats why they label it as a concentrate as it has to be mixed with water - mixes differ from car to car also.

**destrukshn** · 06-01-2009 05:47 PM

Originally Posted by mclovin

i wasn't saying that any of the above was entirely wrong but my point was that for an inexperienced person to just stumble upon this thread and read that you can just change coolant while hot wothout taking pre cautions it could be dangerous.

now a busted rad hose or rad u cant help. so ofcourse u have to work on it hot if u can or just get the thing towed if its on the side of the road.

and some coolant u mix with water anyways, thats why they label it as a concentrate as it has to be mixed with water - mixes differ from car to car also.

honda coolant you do not mix it, it's already premixed.

**philip_pc** · 07-03-2010 06:04 PM

when people say put the fan on hot full blast to encourage uptake of coolant into the motor and aide bleeding, do they mean just fan hot or aircon hot??