ok so iv had my car for 9 years and its done 242K it has never overheated or let me down. last monday i went to swap out my new radiator and when i droped the bottom hose i got a nasty supprise of milky white water with a nice streak of oil through it!!! f-in spewin!!! now the exhaust has no water or steam coming out and there's no signs of water in the oil!! I had a mate who owns a mechanic workshop come over after work and do a pressure test on the rad and with 10 psi pressure and the car running/ revving we got pressure spikes on the guage. so by by gasket/s!!

the only probable cause we found was we couldnt blo/suck through the overflow bottle tube so it couldnt overflow or drawback any coolant!!

ill be doing all the work myself to save money. My question is are these kits any different to the australian models??

http://www.ebay.com.au/itm/Mitsubishi-V6-3-5L-SOHC-24V-MLS-Head-Gasket-Kit-6G74-/370462021280?pt=Motors_Car_Truck_Parts_Accessories&hash=item564141d6a0

Try rockauto.com for parts. Equivalent year Diamante. I buy parts for a 2001 Diamante for my 2001 TJ.

Are you 100% sure that it's engine oil in the coolant and not transmission oil?....I'd be expecting some other signs of gasket failure such as missing, overheating or loss of coolant before I confirmed it as head gasket failure. A blocked overflow hose should not cause a head gasket to fail as the gas pressures on the combustion side of the gaskets by far exceed the pressure that a blocked overflow hose could cause. You can get the coolant tested for combustion gas contamination by some mechanical places.

Let me know how you go... It takes a fairly extreme condition to blow the metal head gasket fitted to a 6G7X 24V engine.

deff not transmission fluid as i have 5sp manual. and the pressure tester showed positive pressure in the cooling system when revved. also when revving we seen bubbles form in the radiator..and after a full flush of system including heater box and new rad there is still oil in the new coolant.. dont know anyone with a color dye gas tester

Take the rad cap off, pop a condom over the opening (not a colored one :D), run the car upto temp look for exhaust gasses in the condom. If you dont see any but still think its gone go for a TK test.

Also if the head has really gone you will have milk under the oil cap as well.

It is necessary to measure the value of the compression in the cylinders. Where blown gasket, compression setting will be significantly lower than in the other cylinders. This is a very simple, but effective way.

To do a compression test on a Gen 3 magna is a bit of a problem because to get to teh rear bank of spark plugs, you have to dismantle the car. it is not feasible if you want to test the compressions when the engine is hot.

I had a Range Rover which ahd a blown head gasket. Which one? I didn't know. It used to blow water out into the overflow bottle and suck it back (sometimes). The problem was that it only started to blow when the engine got really hot eg climbing up a long hill. I could even notice a dropoff in power. I did compression tests and all were identical. Eventually, I bit the bullet and took off the heads and found a small tracking in one cylinder. Heads shaved and new gaskets - problem solved, but the original diagnosis was nowhere near conclusive as to it being a blown gasket.

Some stop leak type of coolant additives also contain a soluble oil to lubricate the water pump. Could be what you are seeing.
I would suggest you just keep driving and see if the problem gets worse. Might not.

.. the oil shown in mine is very clear in colour in top... but when tiped out of the old rad had a slight color streek in it. may be what im seeing?

Could be. I'd see how the car runs over the next few weeks. If something really is wrong, the symptoms will only become clearer as time goes by.

Was it rusty watery goop dribbling out your bottom rad hose, or definately oil that seperated away from the water in a container?

the water from the hoses was defiantly a solid mercy white in color with a shiny oil color "streak" through it and there was also oil bubbles settled on TOP haha.
Was it rusty watery goop dribbling out your bottom rad hose, or definately oil that seperated away from the water in a container?

The radiator that you were swapping out, was that the same radiator that was in the car when it had an auto box in it?
Was the in/out lines on the radiator for the transmission oil plugged up after the conversion?
If not, then over time, air and water may have gotten in and started corroding, allowing enough corrosion over time to allow water to enter the little reseviour tank and oil seeping through into the radiator itself.
May not be it, but is something to consider.

The radiator that you were swapping out, was that the same radiator that was in the car when it had an auto box in it?
Was the in/out lines on the radiator for the transmission oil plugged up after the conversion?
If not, then over time, air and water may have gotten in and started corroding, allowing enough corrosion over time to allow water to enter the little reseviour tank and oil seeping through into the radiator itself.
May not be it, but is something to consider.

nah the doner car has a completely smashed in front. The rad is a brand new ebay one. none of the doner car parts are on my car yet.. but thanks for the input.