Cars Q&A

Hi friend I have 2000 model maruti 800 5 speed car which has done 240000 kms The engine is getting overheated often power has dropped coolant in the radiator needs to be filled often I want to change half engine as I dont want to sell the car I have to check head gasket for leakage and so on can I replace it with Alto half engine I have got mixed opinions from mechanics Some say the blocks are different and a few say they are the same and I can replace it with Alto half engine which costs about Rs 22000 Kindly let me know as the dealer says they will not take back the half engine once sold hence I will not be able to dispose it once purchased Kindly advise before I buy Thanks velavan