White Smoke Coming From The Exhaust Of My 1997 Kia Sephia After Two New Head Gaskets?

Question

We bought a 1997 Kia Sephia RS last year. It has recently been blowing white smoke from the exhaust pipes..which we obviously thought was either the valve seals or a blown head gasket. We have replaced both of these things and yet the smoke keeps coming out constantly for about 30 minutes and then it lightens up until you rev the engine. We have done a compression check and we have 165 -170 PSI. We are unsure of the air/fuel mixture as we thought that was computerized and are not sure how to check this. The car runs smooth other than the smoke. The smoke smells rich... but no oil smell. What else could be the problem?

Answer 1

i own a repair shop,and when they did the heads on it they should have replaced the 0-2 sensor also,,this will make it tun rich on fuel,,the sensor got messes up probably from it running bad,and it may need to be replace,if they didn't put a new one in it,,id check my repair bill and see if it does have a new one in it,,if not i think that will fix your problem with it,,the moisture that was going through the pipe before is what ruined the 0-2 sensor to start with,,good luck,i hope this helps you.

Answer 2

I don't know much about a KIA,but it sounds like a head when you replaced the heads did they true them flat did the people that did the work put have the heads checked for cracks.Does the car use oil white smoke is oil.How long did you run the car after head gaskets it takes a long time for all the antifreeze to dry up out of the muffler,catalytic converter if the car runs good and don't miss drive it for a while see if the smoke clears keep check on oil and water.You don't need fuel aid adjustment computer takes care of that.If you get antifreeze in oil pan take car and trade off fast.

Answer 3

Kia Exhaust

Answer 4

Probably coolant leak. Chect the oil cap, if it has whitish crystals on it might be a cracked head. Is the cooland magicaly dissapearing? Also, might be the oxygen sensor, maulfunctioning fuel pressure regulator, or just the fact that you bought a disposable car. Hit the air flow meter with a hammer, that might solve the problem. Maybe the water temp sensor, air pressure sensor.

Answer 5

I used to change alot of head gaskets working at a large chev dealer and sometimes it took an hour or so of driving it around to burn all of the coolant out of the exhaust system afterwards.

Answer 6

White smoke is definitely oil burning, maybe the seal around your plugs is leaking into the chambers or could be your piston rings are just done and oils getting by them. But it is most definitely oil. Hope this helps

Answer 7

You may have just got bad head gaskets. Take the car back to the shop and get new ones put on. Then, trade the thing!

Answer 8

Sorry to say this but you need to replace the rings.When you take the head or heads off if you are not real careful you will get micro bits of carbon in & around tho rings.When you start it up ,it washes the moly coating off the the rings It acts like sand paper!!

Answer 9

Did you not ask this yesterday? Best check the head for cracks and or warpage. Was new head bolts used the last time the head gasket was changed?

Answer 10

white smoke is water
blue smoke is oil
black smoke is hydrocarbins (unburned fuel)

theyre may be condensation in your tailpipe or somewhere leading out of the engine
that will blow white smoke until its one
it happens more on colder days because there is more condensation there and it takes longer to evap out. if it goes away when your engine is starting to get warm there is no problem