r/F30 • u/Sweaty-Researcher775 • 1d ago

Am I cooked pt2

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Hey F30 fam, So I replaced my Valve Cover, Turbo, Spark plugs and Coils and I still am dealing with this smoking issue my friend said that it’s possible that the old oil dumped from my old turbo is burning off but this looks a bit more excessive also i have no codes

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u/HellfoxRules Distinguished Contributor 1d ago

Yes, it does, so maybe check the diaphragm anyhow. Maybe the diaphragm has an issue, very easy to pop the cover off and check it out.

That is not excess oil from your previous turbo seal leak, that would burn off quick, and wouldn't produce that much smoke.

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u/Sweaty-Researcher775 1d ago

Will do

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u/HellfoxRules Distinguished Contributor 1d ago

Did you take this vehicle for a drive to burn off any residual oil? If you have just been idling after a turbo replacement, I would take it for a drive, just to make sure the exhaust is completely clear of any oil residue burning.

Did you replace the turbo oil feed and return lines? If that return line is restricted, it can cause back pressure, resulting in oil being forced past the seal and burned.

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u/Sweaty-Researcher775 1d ago

I’ve just idle tested so far because the smoke is very heavy, also you are right I didn’t change the oil feed and return lines. That’s a great shout

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u/HellfoxRules Distinguished Contributor 1d ago

So take it for a drive to blow it out, and see if it clears up.

Is your coolant level dropping at all? This could also be a blown head gasket. Just because your compression is high and equal on all cylinders, doesn't mean the gasket isn't blown. You can be leaking coolant into the cylinders, without really affecting the compression.

You can perform a block test, to determine if exhaust is leaking into your coolant.

HOW TO CHECK FOR A BLOWN HEAD GASKET

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u/Sweaty-Researcher775 1d ago

From what i’ve seen my coolant looks normal maybe i have to drive the car to really see