coolant resevoir tank blew a 5 inch rip i relaced it car ran for 3/4 mile ,and on 1997 BMW 528i

overheated sat it for 2 hours and was able to drive it home, it starts, it runs but if i drive it more than a mile it starts to smell and steam comes out from underhood ive known i have had an oil leak for sometime but have not had the money to fix it i know its not a head gasket because car purrs there is a rainbow color leak rt under drivers side near tire well any advice?

by in Union City, CA on December 26, 2012
3 answers 3 comments
ANSWER by on December 26, 2012
POSS AIR BUBBLE IN COOLING SYSTEM. HAVE CAR CHEMICALLY TESTED FOR HEADGASKET POSS LEAK
COMMENT by on December 26, 2012
oh k i thought that thats prolly what it is thank u for ur answer..
ANSWER by on December 26, 2012
We think it could be an air pocket as well, but if you are seeing steam you must have another coolant leak. We would also recommend checking to see if there was or is any head gasket damage. Oil leak could be PCV system pretty common on BMW's.
COMMENT by on December 26, 2012
Thank you so much
ANSWER by on December 26, 2012
potential causes: AIR — Air in the system. Restricted Coolant Cracked Cylinder Head Leaking Cylinder Head Gasket Loose Drive Belt Defective Water Pump
COMMENT by on December 26, 2012
u all seem to be pointing to a leak in a head gasket so thats what ill shoot to get fixed. ill go for the simpler fixes and go down your list and pray its not the water pump...thank you much