Mgerrie147

Hi,


I have a forged Hawkeye with a MDX321T just remapped to 1.6 bar with 11mm Headstuds. I was driving at max load the other morning, when suddenly the car started overheating.


I pulled over and opened the bonnet, I found the car had lost oil and it looked thin like it had coolant in. I noticed that coolant had shot out the expansion tank (But the car had done this before without overheating as it has the small expansion tank with a big aftermarket radiator).


The car started perfectly no smoke so I don't think it is the ringlands.


Does it sound like it has lifted the heads?


Regards


Matthew

trevsjwood

iTrader: (2)

sounds like the head gasket. coolant moving into the expansion bottle, there should be none other than the normal level rise and fall due to hot/cold of the engine temps.
If the OEM water temp gauge has gone up above halfway at anytime is bad news for the future of the engine.
Trev

ScottyPPP

Doesn't sound too promising. Is it a semi closed or open deck?

Mgerrie147

Yea it is a 2010 sti scdb pal, sounds like gaskets to me

Mgerrie147

Luckily no clouds of smoke and starts and runs sweet off boost so block should be ok

Mgerrie147

Going for cdb how much did you pay for inserts scotty?

Steve001

iTrader: (7)

Also worth considering 14mm conversation on the block too, I've gone this route with 14/12mm studs

alcazar

iTrader: (2)

Nope.
Sounds like headgaskets. Get a "sniff test" done to confirm.

I'd avoid driving it at all until you know for sure, on, or off boost.

Oil in coolant, probably coolant in oil: thin oil, bearings?

These have a habit of doing main bearings after headgaskets. Ask me how I know?

ScottyPPP

When my 2.1 lifted the heads it only leaked from the cylinder to the water jacket.

ScottyPPP

I specced an entire engine to be built, 2.5 CDB drilled for 14mm studs, AVCS heads etc. So I can't say just how much the block was as I'm not entirely sure.

Mgerrie147

Hi,

Well the car got driven hard today as oil looked good (Think dipstick got wiped with a cloth with bio ethanol on) and coolant looked good.

No overheating, under max boost, however ambient temps were higher then at
6am when it done it, this has lead me to think either-

1.Due to the warmer air there was less pressure on engine e.g less air so heads did not lift

or..........................................

2.I have noticed the car gets colder when going fast like the other morning, now run on Bio-Ethanol, so have lower combustion temps and run a Alloy Radiator with an extra 3.0lt of coolant,

I think that the car may have got so cold the thermostat shut, heating the coolant on boost rapidly.

I think I may be lucky and there was just to much fluid expanding due to the big radiator and the car just got to cold with a mixture of Bio-Ethanol, Cold Weather and the Big Radiator.

Going to fit a OEM Rad before winter, think it may fix issue!

cheers for your help guys

alcazar

iTrader: (2)

OK guy, you know best.

Steve001

iTrader: (7)

Did he get a sniff test?

alcazar

iTrader: (2)

Nope, he know best.

Steve001

iTrader: (7)

No doubt he'll be back soon enough for engine builder contact detail

alcazar

iTrader: (2)