what to do when car engine began to warm ?

check your antifreeze if it is low other wise pending how you drive your car it could need a thermostat

i dont get it...how warm? "overheating temp" warm, "cruising" or "running speed" warm or just idle after ignition? you just cant get a thermostat without pointing out on what the real problem is...

get bigger hoses..if you see the little hoses connected from your air filter to your engine block (they are used for getting cold air into the block to cool the pistons from over-friction, and cold air means more power...), get bigger ones and make sure install atleast a short ram with it... if it's an overheating problem, make sure you check your radiator regularly...always have a gallon of water or a bottle of coolant handy...overheating will damage your radiator and it'll blow up...the heated water might rise and flood your engine block and that's gonna be nasty(check the hose connected from your radiator to your engine)... other than that, you really dont need a thermostat...that's why there's a TEMPERATURE GAUGE on your dash...what's the point of having one if you don't check it? unless it's not working, you HAVE TO get it fixed...