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Coolant

RCZIain

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Mine never used any.
There is an issue with I think the thermostat housings which can leak.
Whether that is an engine specific thing, or any RCZ can have it I'm not sure.
 

neilgsxr69

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Yes some do tend to use a little but if your topping up weekly then you’ve probably got a leak or a faulty expansion bottle cap. There are a few places that seem common for leaks but as mentioned above the plastic thermostat housing is a usual suspect.
 

Verminator

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If its the head gasket when you take off the filler cap and look under it and if it's got sludge in then this is a tell tail sign if it is clean or just black and oily it all OK and as other's said it a faulty expansion bottle cap....
 

neilgsxr69

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Short journeys will sludge up the oil filler cap so don’t mistake this for a blown head gasket
 

Pedro

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Head gasket failing is a serious problem on any car you will get coolant temp engine warning lights ECU codes & generally it will run like crap because the plugs will be getting damp as the coolant mixes with the fuel as the gasket fails It may be a coolant system leak relating to the water pump (mine has been changed as the bearing gave up) which are a generic fault on the RCZ s plus coolant sensor/thermostat housings are another know suspect to die off
 

Lisaal123

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Head gasket failing is a serious problem on any car you will get coolant temp engine warning lights ECU codes & generally it will run like crap because the plugs will be getting damp as the coolant mixes with the fuel as the gasket fails It may be a coolant system leak relating to the water pump (mine has been changed as the bearing gave up) which are a generic fault on the RCZ s plus coolant sensor/thermostat housings are another know suspect to die off
The Z still runs like a dream I'm confused
 

neilgsxr69

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If your still losing coolant and your car is running fine then it’s not going to be the head gasket more likely a leak somewhere
 
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