Oil sump full of coolant, WHYYY??

[bartsscooterservice]

Any chance you have a head bolt or two bottoming out? Torque wrench working incorrectly? Dry bolt threads giving high torque wrench readings? Warped head?

good point. Since he's poiting out there's coolant in each cylinder, it must be a head gasket failure.

[Reverend]

Well I have new gasket on place so faulty gasket won't explain symptoms. I loaned a leakdown tester and results were confusing. I can hear loud hiss coming from below timing chain (oil sump) IN EVERY CYLINDER. Has the head cracked or what? I did test twice, second time after i retorqued bolts. No change to results.

[Reverend]

Well my mechanic friend confirmed that it "should" leak a little from every cylinder, pressurised air gets trough from pretty small places. But still no resolution to cyl 2 and 3 behavior.

[Reverend]

Figured out reason for low pressure, exhaust valve leaks like he**. Must be bent valve? Cause lash is set by the book. Luckily i have set of new exhaust valves, thanks to Arne But im taking it to machine shop, they can do it better. Still doesnt explain why the oil was mixed with coolant... :/

[bartsscooterservice]

Is the head gasket oem nissan or some immitation brand? Some gaskets can give troubles.

[Reverend]

it was (and new one as well) MSA gasket.

[bartsscooterservice]

try another head gasket brand than MSA..

[Reverend]

Well.. too bad none available right now. Not THAT common car, nor part around these latitudes :/ Taking the head to machine shop today, hope to hear some good news soon. I've took the head off so many times now that i can do it with eyes closed.

[hr369]

Did the machine shop perform a pressure test on the head or just check it for straightness?

I had a casting flaw by the exhaust valve that let water into the engine. You are having problems with the exhaust valves sealing. I'de check for cracks around the exhaust valves.

felpro head gasket will work just fine.

Edited May 13, 2013 by hr369

[siteunseen]

Felpro from amazon.com $18 with free shipping to me, I'm not sure about your latitude.

Edited May 13, 2013 by siteunseen

[Reverend]

They just checked the straightness. Well its back on the shop for valve job, hope they do not find anything scary out there.

[240260280z]

I just read that a hidden hole can develop behind the water pump and let coolant into the oil.