Following on from this old thread. . . http://www.aussiemagna.com/forums/showthread.php?t=45505

I have the same problem as him, or did until a couple of days ago.

A couple of weeks ago my car started sucking the water out into the overflow but not giving it back when it cooled, the coolant has no traces of foreign liquid.

I havent got around to getting the new bottle for various reasons yet. Anyway yesterday I noticed lots of coolant coming out of the overflow part of the lid and onto the ground after I got out of the car after trip to the supermarket instead of just it dumping itself into the overflow bottle for me to put back into the radiator later.

I'm really hoping this is most likely just a case of I now need a new bottle AND lid. With my extra problem now is it likely to be anything else?

Thoughts?

Cheers.

have you checked to see whether your thermo-fan is working?water might be boiling inside the overflow and coming out. Happened to me, was simply a relay that was screwed and stopped the fan from working, resulting in a cracked head :doubt:

i'd be checking the radiator cap

i'd be checking the radiator cap

+1 For new radiator cap

have you checked to see whether your thermo-fan is working?water might be boiling inside the overflow and coming out. Happened to me, was simply a relay that was screwed and stopped the fan from working, resulting in a cracked head :doubt:

I didnt think of it but I know the noise of the boiling from under the bonnet if it was, My old old '89 Laser used to love it on hot days, but I wouldve picked up on it for sure if it was :doubt:



+1 For new radiator cap

Interesting, it was replaced probably 6 months ago from an over-zealous mechanic imo but I had noticed some strange loose wear on the lip when I take off the cap. Since it was replaced so recently though I dismissed it. May have to look into that as well. Thanks.

[QUOTE=phoenix5]I didnt think of it but I know the noise of the boiling from under the bonnet if it was, My old old '89 Laser used to love it on hot days, but I wouldve picked up on it for sure if it was :doubt: [QUOTE]

Mine didn't actually make any noise though mate, just water on the road under the car-alot of it. I found out when I opened the bonnet and ran the car. I noticed that the water was steaming when it came out of the overflow tube.

I didnt think of it but I know the noise of the boiling from under the bonnet if it was, My old old '89 Laser used to love it on hot days, but I wouldve picked up on it for sure if it was :doubt:

Mine didn't actually make any noise though mate, just water on the road under the car-alot of it. I found out when I opened the bonnet and ran the car. I noticed that the water was steaming when it came out of the overflow tube.

Ah ok. I'll have a serious look at that tomorrow on my list to check as well then.

Cheers.

You may have a cracked head, they tend to crack near the exhaust ports, this will not cause the normal oil in water etc.

To a co test to determine.

As for cap, if it is not the std ND cap from Mits, Toyota etc, chuck it and get one, the CPC caps are crap

You may have a cracked head, they tend to crack near the exhaust ports, this will not cause the normal oil in water etc.

To a co test to determine.

As for cap, if it is not the std ND cap from Mits, Toyota etc, chuck it and get one, the CPC caps are crap
THanks, yeah that's my worst fear that I've tried to block and am doing the basic things first before a compression test which might just have it fail right there and then which I'm not keen on.

I doubt the Mech would've got an authentic cap so I'll order one of those from mitsubishi tomorrow.

Thanks.

I do not mean comp test as this will now show cracked head, you need to do a monoxide test to the cooling system

I do not mean comp test as this will now show cracked head, you need to do a monoxide test to the cooling system

Sorry my misunderstanding, Im not the most savvy and co led me straight to compression. :redface: :cool:

And now a monoxide test goes way over my head. :redface:

Radiator cap or even a hole or crack in the hose from the radiator to overflow could cause that. Hope it aint something serious.

i have seen brand new radiator caps not set at the correct pressure. and there fore just because the cap is new/6mths old doesnt mean its not the problem.

And a monoxide test is to se if there is any exhaust gas in your cooling system, meaning there is a crack in the head/ head gasket......

Anyway yesterday I noticed lots of coolant coming out of the overflow part of the lid and onto the ground after I got out of the car after trip to the supermarket instead of just it dumping itself into the overflow bottle for me to put back into the radiator later.

I'm really hoping this is most likely just a case of I now need a new bottle AND lid. With my extra problem now is it likely to be anything else?

Thoughts?

Cheers.

Mate, mine did that too. Left stains all down the outside of the bottle. If the overflow lid goes porous the flow of hot, expanded water from the radiator will gush through the actual pores in the lid rather than push down against the weight of water already in the bottle.

Mine went porous in the plastic elbow going into the lid. I eventually hacked it out and fed a longer rubber hose down a new hole. Sealed up nicely and worked perfectly.

Under normal running conditions all being good there should be no flow. In general the cap pressure will hold what is in the rad where it is.

When you start having pressure issues, then you will have the over flow bottle work and then you will have leakage.

Caps will pressuruse and then eventually bypass, when all cools down the cap will allow coolant to flow back to the radiator.

So the bottle arrived on Thursday ($20) but I haven't got around to doing it until today so I postponed the radiator cap buy until I saw if this fixed the problem.

So just for starting overs sake I flushed the radiator and put new coolant in, put in the new bottle and lid and warmed it and then left it on idling at normal temp for 10 minutes. Switched it off and no overflow onto ground. An extended time on the highway will probably test it further tonight as the motor want to run hotter but at the moment I hope this is the be all and end all and a nice cheap fix. :pray:

Thanks all.