Cux350z

iTrader: (162)

Check dip stick.
Oil change is cheap compared to HG.
Its not uncommon for the bottom of your oil cap to be milky.To me...its gonna look like melted milk chocolate.

Signs of HG failure could be pushing coolant out your overflow tank, milky oil.

If you do have milky oil...don't run it. Your entire engine will get dirtied up.

Get you a no spill funnel. Jack the front end up as high as you can! Bleed it through the radiator cap..not that rear vent.

yosip1115

I'll drain the oil tomorrow

bealljk

iTrader: (13)

post pics of your oil cap ... here's what mine looked like:

yosip1115

Jeez bealljk, mine looks similar but there isn't as much foamy oil. Same color though, just less.

As some other members said though, this is not a definite indication of a blown head gasket since the moisture could be from condensation inside the crankcase from previous cooldown. I believe you actually may be getting at that point?

What's killing me is that I've bled five or six different VQ before. Full flushes or just regular maintenance requiring a drain of coolant.
I've even bled this engine in a different vehicle. I have never had one give me this much trouble before. I ordered a spill free which will be in tomorrow, but when I drain the oil in a few minutes I have a feeling it's going to be some really black stuff for only a few hundred miles from what I saw on dipstick and in oil sample.

Any other tests/suggestions would be appreciated

yosip1115

Looks pretty normal I guess. All of the bubbles settled out of the oil after it sat in the drain pan for a few minutes. It doesn't look too bad, no layers of water or glycol that I can see

I have a Blackstone uoa bottle coming for the hell of it

bealljk

iTrader: (13)

I popped my HG circa 2015 (on my setup)

I would do what cux said and drain the oil(obviously) put fresh oil in, rebleed (pain in the @$$) the system and see where you're at. Check your dipstick and your oil cap and if the milky-ness continues consider sending an oil sample to blackstone labs and they can confirm whats making it into the oil.

yosip1115

Dip stick is looking normal, oil is good. So that's good.

I'm back to the radiator cap seal the. Bubbles/fluid come out of the overflow before the system has good Pressure. Will update.

yosip1115

Alright fellas, in the end it all boiled down to the radiator cap. See what I did there.

I threw a second seal under the radiator cap and it overcame the imperfection on the sealing surface that I was working to smooth out the other night.

Now the coolant doesn't come out of the reservoir as it's expanding. It builds pressure first and expands a more reasonable amount.

All that because I broke a cheap aluminum barb fitting off of the radiator and had to tap the hole...

Just beat some ~600cc street bikes, haha

Thanks for the help guys

Logiqal

iTrader: (1)

^Good thinking on using another seal. You didn’t need that Koyo radiator cap anyways.