Right boys, this has been bothering me now since I bought the car, and I still haven't been able to cure it.
The outline of the problem, is that any driving style, be it normal or giving it some abuse, upto around 110mph, the water level stays perfect regardless.
As soon as I take the vehicle above 115-120mph, the coolant system decides to begin emptying itself, via the overflow on the expansion bottle.
The coolant is NOT being consumed in the motor, as it's usually all over the engine bay.
Before anyone jumps in and says, "mate mate your headgaskets fucked", this is what's been done in the various phases.
Phase One was a completely stock motor with the following,
JAM ECU,
ZEP Downpipe,
Full HKS System,
HKS Mushroom,
HKS Actuator,
HKS SSQV,
Stock Radiator.
On this set up, the car ran fine, had 160PSI on all four pots, and the coolant system was pressure tested and the result was fine.
Phase Two was the same setup, but with a brand new Toyota Headgasket, waterpump and radiator.
Phase Three was the same, but in addition, it ran a TRD 0.6mm HG, a WEPR manifold and 1.1BAR.
Phase Four, which is the current state, the spec is as follows.
JAM ECU @ 1.2BAR.
4e Block, decked by 0.40mm.
Standard Pistons and Rods.
New Toyota Piston Rings.
ACL Duraglide Crank Barings, Big Ends & Thrust Washers.
Fully Overhauled Cylinder Head with 0.05mm skimmed, all new Valve Stem Seals, Valves recut.
WEPR Manifold.
CT9A.
ZEP Downpipe.
Full HKS System.
Injectors Overhauled.
New Oil Pump.
All New Gaskets, from Toyota.
Toyota Headgasket, 1.2mm.
New Waterpump.
New Thermostat.
Heatrange 7 NGK's.
New Stock Radiator, with Fan continually on.
Standard Expansion Bottle.
TRD RAD CAP, 1.3bar.
The same problem is still occuring..... :shoot:
Possibilities for cure that I have thought of...
Bigger Ally Radiator?
Lower Temp Thermostat?
Bigger Expansion Tank?
Use of a coolant like "Wetter Water" ?
All of the above?!
Just really lost for ideas now, any help would be greatly appreciated.
Thanks, Tommy.
The outline of the problem, is that any driving style, be it normal or giving it some abuse, upto around 110mph, the water level stays perfect regardless.
As soon as I take the vehicle above 115-120mph, the coolant system decides to begin emptying itself, via the overflow on the expansion bottle.
The coolant is NOT being consumed in the motor, as it's usually all over the engine bay.
Before anyone jumps in and says, "mate mate your headgaskets fucked", this is what's been done in the various phases.
Phase One was a completely stock motor with the following,
JAM ECU,
ZEP Downpipe,
Full HKS System,
HKS Mushroom,
HKS Actuator,
HKS SSQV,
Stock Radiator.
On this set up, the car ran fine, had 160PSI on all four pots, and the coolant system was pressure tested and the result was fine.
Phase Two was the same setup, but with a brand new Toyota Headgasket, waterpump and radiator.
Phase Three was the same, but in addition, it ran a TRD 0.6mm HG, a WEPR manifold and 1.1BAR.
Phase Four, which is the current state, the spec is as follows.
JAM ECU @ 1.2BAR.
4e Block, decked by 0.40mm.
Standard Pistons and Rods.
New Toyota Piston Rings.
ACL Duraglide Crank Barings, Big Ends & Thrust Washers.
Fully Overhauled Cylinder Head with 0.05mm skimmed, all new Valve Stem Seals, Valves recut.
WEPR Manifold.
CT9A.
ZEP Downpipe.
Full HKS System.
Injectors Overhauled.
New Oil Pump.
All New Gaskets, from Toyota.
Toyota Headgasket, 1.2mm.
New Waterpump.
New Thermostat.
Heatrange 7 NGK's.
New Stock Radiator, with Fan continually on.
Standard Expansion Bottle.
TRD RAD CAP, 1.3bar.
The same problem is still occuring..... :shoot:
Possibilities for cure that I have thought of...
Bigger Ally Radiator?
Lower Temp Thermostat?
Bigger Expansion Tank?
Use of a coolant like "Wetter Water" ?
All of the above?!
Just really lost for ideas now, any help would be greatly appreciated.
Thanks, Tommy.
