my brothers civic is overheating if you drive over 55. no oil water mix. He replaced the temp sensor. his friend put a new head gasket on it(also surfaced the head and put stem seals in)brand new water pump, 3 different thermostats, good radiator, fans working. after the head gasket it now smokes out he pipe white. anyone have any other ideas? i'm going out there sunday to see what the deal is. more than likely will drop in another motor to save time, but would like to know what is wrong. this motor runs perfectly smooth with lots of power.

 

does the exhaust gas smell sweet?

 

start simple...
gut the thermostat.

 

if it started after u changed the headgasket i would suspect that first. might be a crack or something wrong with the head too.

 

man thats nothing

i fried my ecu and ive been running limp mode all week long

ull be white smoke man ill be black smoke man

 

yeah if you cahnged all of that.more than likly one of your water jackets have a hairline crack. i know 84-87 motors alot of people put there headgasket on backwards.

 

well i'll have it figured out soon i hope. gonna blow out there sunday night and see whats up with it. its an 11 hr ride from me.

 

My 1994 Chev Cavalier did that much smoke w/ a cracked head. so watch out for that. (yes i know, you dont have a cav)