I just finished a head gasket repair on my 2015 Prius. Everything was torqued to spec, car runs great now! I did a dye test on radiator and dye stays blue. I let the car idle and coolant level stays exactly the same.
Im now having milky oil. I’ve done 2 oil changes (changed filter before first oil change) and oil was milky the second flush. I haven’t done a third flush yet. Also I’ve only let the car idle.
should I drive the car a bit to move things around? Then do another oil change and oil filter replacement? Is this pretty common after a head gasket repair?
Did you retorque after some heat cycles?
Did you replace the head bolts? Head bolts should only be used once due to stretching.
@boot I didn’t but like I said the combustion test is good. No yellow in dye. So I can confirm that’s good. Engine runs beautifully. And no codes
Looks like you're going to have to do the job over. Milky oil will kill your engine.. Replace the bolts and get the heads milled in order to do the job right. It ain;t cheap but it still beats a new car payment.
No yellow in dye.
Irrelevant. That just means exhaust isn't getting into coolant (probably). It says absolutely nothing about about a failed gasket between oil and coolant channels.
Is this pretty common after a head gasket repair?
Not if it was done properly. That milky oil is destroying your engine bearings.
@chucktobias
I did the torque specs to a T. Did an x pattern starting from middle to out. Got the head checked, no warp, resurfaced everything..
From what you are reporting it appears that coolant is getting into the oil somewhere regardless. If you want to be certain you could send an oil sample out to a lab for analysis.
the combustion test is good. No yellow in dye. So I can confirm that’s good.
That does not confirm it's good. Head gaskets have a number of different failure modes. Depending on the nature of the leak you can have coolant leaking into the oil without combustion gases getting into the coolant. In such a case the dye test would not detect the leak.
@chucktobias right but what I’m saying is the head gasket wouldn’t be the problem. So problem could be elsewhere sure.. but head gasket can be ruled out correct?
No, that does not rule out the head gasket. It's not really possible to know where the failure occurred without a post-mortem examination. However you might look at other possible places where coolant can get into the oil such as a leak in an oil cooler integrated into the cooling system, if your car has one.