Either ready mixed coolant.
Or.
A 50/50 mixture of antifreeze and water.
10w/40
Drain it out.
Get in car. Put key in ignition switch. Turn key.
Don't bother. Assuming it's stuck open (running cold temperature), put another in-line thermostat (Quintin Hazel QTH205) into the radiator hose.
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a 1.4 is 3.55 Litres, so i would say put in 4.50 Litres.
Put it in the radiator but also make sure the overflow tank is full. Follow the overflow tube from the radiator and you will find the tank.
put ignition on and hold in the as button above the number pad on the console for 10 seconds then let go and use 1,2,3 and 4 numbes to enter it.
Remove the bottom hose from your 1995 Chevy Corvette radiator. Allow the coolant to drain out. Put a hose into the top of the radiator. Run water through the radiator until it runs clear.
General Motors recommended 10w40 synth or semi when the car was built. They then chaged to 5w30. Either should be fine.
u put it in recovery tank if need it only!
Unless someone has put oil in the water bottle in error, there is an internal failure in the engine. The most common (but not the only) cause is that the head-gasket has failed.