hope u people can help me sort this problem. i recently bought this ek 1.5exi. so many problem. now got problem again, d car seems to overheat 3/4 n then drop when d car stay at traffic. driving is ok. funny thing is when i c overheat i off d engine. less than a sec i start temp back to normal then temp rise n drop. i change d radiator n fan same result too. any help? while i change d radiator i spill d trans oil. no luck. wat oil shud i use?