White smoke out tail pipe

[SwampFox]

I did a search and did not find what I needed so if it is here sorry. I bought a 1999 Camaro Z28 with 106K. I have LT heads, K & N air charger, off road y pipe to what appears to be flow masters. I don’t know if there are any other mods. I have found that the car seems to have the white smoke coming out the tail pipe in small amounts after it has run and up to temp. I know what it looks like head gasket or intake gasket but there is not oil in water or water in oil I check before I bought it and I have change the oil in it now. Is there anyway to check if it is one or the other or should I do both to be safe? The car runs great except for the white smoke and the 1153 code on the computer which I look and was told it is contamination on the o2 senor. I did change the senor just in case it was that for the code but it came back. If I have to change both is there any surprises and how do I adjusted the valves? If you have a better idea let me know.
Thank you

[Orcus79]

well the valves don;t need adjustment unless something has been bent and or broke.

As for the white smoke are you sure it is smoke and not condensation? what conditions did this smoke show under? If it is a head gasket an "easy" check is to pull the oil dip stick and see it has been contaminated, then start pulling the plugs and seeing what they look like.

[FORD RECOVERY EXPERT]

can also air up the cylinders and see if any bleed off...

[SwampFox]

The smoke will be coming out a 24 mile trip and it will be in the middle of the day 50-60 degrees. It is small puffs not very noticeable unless you are looking for it. The valve adjustment I am talking about is after install of the heads and you have to tighten the rocker arms up with the push rod. I know they are hyd liters. There is no oil and water mixed

[Smittro]

The smoke will be coming out a 24 mile trip and it will be in the middle of the day 50-60 degrees. It is small puffs not very noticeable unless you are looking for it. The valve adjustment I am talking about is after install of the heads and you have to tighten the rocker arms up with the push rod. I know they are hyd liters. There is no oil and water mixed

Oil and water dont have to mix to burn coolant! It could be leaking directly into the combustion chamber. It may not be mixed with the oil because the leak is so slight that it's being burned. Check the torque on your head bolts. This can sometimes be caused by "out of sequence torqueing, over torqueing, or under torqueing. It sounds like the smoke is happening after the thermostat opens at operating temp. It will get worse. The "blow by" pressure will eventually open an area of the head gasket. Then you WILL have oil and coolant mixing. I would just do a new set of gaskets. Get new head bolts and make sure the tapings are clear of oil and or debris before you torque them down.

[Smittro]

can also air up the cylinders and see if any bleed off...

Yes I've also used this method to change valve springs without pulling the heads too.

[Poppn]

wouldn't you be missing coolant if it was a leak?

check your coolant level over an extended period of time

[Smittro]

wouldn't you be missing coolant if it was a leak?

check your coolant level over an extended period of time

Yeah. But not till the rez is empty I'd think.

[JaycenK]

Pulling the plugs will tell the story.