Milky substance on my oil cap

mag_black · 02-01-2018, 01:09 PM

I'm going to use the block tester out, I just watched some videos. Then it's off to the shop once I figure out what it is or if I can't figure out what it is. Thanks everyone. I'll report back soon.

Quote:

Originally Posted by Jhill

Well I wouldn't think 25mi as too short, can't help you on the climate as all my experiences is Ca and if it hit so 7 here then something seriously is wrong. Wouldn't hurt to pick up a block checker kit, super easy to use and will probably cost you less than the labor at a shop.

@Jhill, do I put the block tester on the oil fill or on the radiator?

mults · 02-01-2018, 01:34 PM

Happened a few times on my wife's Sonata...short trips, cold ambient temperatures. Had the oil changed and it never showed up again. Let's hope yours is the same...

Chuck33079 · 02-01-2018, 01:37 PM

Really stupid question, but is it possible that the ARC combo tank is letting the goop from the catch can mingle with the coolant?

Felix 808 · 02-01-2018, 01:45 PM

You've got coolant mixing with your oil. Not good. I've been there before, Mine was a cracked cylinder on an old CJ5 not fun.

Jhill · 02-01-2018, 01:56 PM

Quote:

Originally Posted by mag_black

I'm going to use the block tester out, I just watched some videos. Then it's off to the shop once I figure out what it is or if I can't figure out what it is. Thanks everyone. I'll report back soon.

@Jhill, do I put the block tester on the oil fill or on the radiator?

Goes on the radiator fill.

abm89 · 02-01-2018, 02:19 PM

Oh boy. I hope it is not serious.

gomer_110 · 02-01-2018, 05:42 PM

Quote:

Originally Posted by V8Nissan

When you drain the oil, I would let the engine sit at least overnight and then not start it before draining it. See if the water / coolant separates to the bottom. Blackstone oil analysis is also an option if you can get a sample container quick enough or use another clean container for the oil until you can get one. They would be able to tell you exactly what it is most likely.

Another easy way of checking oil for water contamination is to CAREFULLY drizzle the suspect oil onto a hotplate or similar. If the suspect oil snaps, crackles, and pops then it has water in it. If is just flashes/evaporates away its not contaminated.

*J*ap***V*et* · 02-01-2018, 05:57 PM

Hope it isn't too serious but I've seen an MR2 with a blown, well cracked head gasket and his oil cap looked the same. Also the exhaust fumes and thickness of the cloud was off as well. Any difference in exhaust smoke? As in an extreme excess..

RumbleFish · 02-01-2018, 06:42 PM

I remember seeing the same thing in my '76 Subaru in HS, blown head gasket.

Rusty · 02-01-2018, 07:12 PM

Looks like condensation. Moisture evaporating, and the cap is the cool spot where the moisture collects. Common problem with some oils with short trips. My one 5.7 Hemi is great at doing this Possible cause could be the ARC tank also. You can go to a shop and have them check the cooling system for combustion leak into the system.

mag_black · 02-01-2018, 08:46 PM

Quote:

Originally Posted by Chuck33079

Really stupid question, but is it possible that the ARC combo tank is letting the goop from the catch can mingle with the coolant?

That is a possibility. I plan on inspecting it this weeks when I use the block tester as well. I hope it’s not serious, it’s really depressing.

If it’s worse case scenario, what is the cost of replacing head gasket. I know the head needs to be sent out to check for any warping.

Such a drag. Super bummed right now. Thanks everyone for the replies and advice.

mag_black · 02-01-2018, 08:47 PM

Quote:

Originally Posted by Jhill

Goes on the radiator fill.

Thank you sir.

mag_black · 02-04-2018, 05:21 PM

Reporting back that I found the issue. My ARC catch can had water in the tank and it pulled it through the tubes. I have a video of me emptying out about 2-3 oz of water. I took it out and cleaned tubes and tank and left to dry. Tomorrow I will use the block tester after I put it back together just for comfiirmation.

The next step is change oil out. Should I change oil and let it run a bit and then change again or will I will be fine with one oil change?

SouthArk370Z · 02-04-2018, 05:52 PM

Oil's not that expensive. I'd change twice if for no other reason than peace of mind.

Rusty · 02-04-2018, 06:12 PM

If you change the oil twice. You will not get the moisture out. Unless you get the engine hot enough to evaporate the moisture that's on metal.

02-01-2018, 01:34 PM	#17 (permalink)
mults A True Z Fanatic Join Date: Aug 2011 Location: Cleveland, OH Age: 69 Posts: 1,830 Drives: 2010 (40th) #706 Rep Power: 16885	Happened a few times on my wife's Sonata...short trips, cold ambient temperatures. Had the oil changed and it never showed up again. Let's hope yours is the same... mag_black likes this. __________________ mults 40th Anniversary 'Z', 312.06HP/260.58TQ (Dynosty EcuTek Tune) Build Date/Number: 1/27/2010 #706 Berk HFC + CBE, R2C CAI, Clear Bra, Cleveland Z Club

02-01-2018, 01:37 PM	#18 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	Really stupid question, but is it possible that the ARC combo tank is letting the goop from the catch can mingle with the coolant? Rusty, mag_black and sx moneypit like this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

02-01-2018, 01:45 PM	#19 (permalink)
Felix 808 A True Z Fanatic Join Date: Oct 2011 Location: Camarillo, CA Posts: 1,063 Drives: 2011 PW/Grey T/S 7AT Rep Power: 2806	You've got coolant mixing with your oil. Not good. I've been there before, Mine was a cracked cylinder on an old CJ5 not fun. __________________ Semper Fi Μολὼν λαβέ Last edited by Felix 808; 02-01-2018 at 01:48 PM.

02-01-2018, 02:19 PM	#21 (permalink)
abm89 A True Z Fanatic Join Date: Feb 2013 Location: Austin, Texas Posts: 1,307 Drives: 11 370Z \| 24 EL450 Rep Power: 64763	Oh boy. I hope it is not serious. mag_black likes this. __________________ Complete Parts List: https://github.com/abm89/ztouge-build

02-01-2018, 05:57 PM	#23 (permalink)
Jap**Vet* Enthusiast Member Join Date: Nov 2017 Location: Illinois Posts: 479 Drives: 2009 370z Rep Power: 115133	Hope it isn't too serious but I've seen an MR2 with a blown, well cracked head gasket and his oil cap looked the same. Also the exhaust fumes and thickness of the cloud was off as well. Any difference in exhaust smoke? As in an extreme excess.. mag_black likes this.

02-01-2018, 06:42 PM	#24 (permalink)
RumbleFish Premium Member Join Date: Oct 2013 Location: Los Feliz, Ca. Posts: 1,212 Drives: '10-Sport-M6 Rep Power: 8239	I remember seeing the same thing in my '76 Subaru in HS, blown head gasket. mag_black likes this. __________________ How far, this...Utopia? F.I. CBE V2/Stillen G3 CAI/GTM 25R OC/EcuTek tune (Specialty Z)/ KW V3's/Stillen Sway bars/SPC rear camber kit/Z1 FUCA/Mich. PSS4S 255/35-295/30

02-01-2018, 07:12 PM	#25 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,873 Drives: 2011 Nismo GM 6M Rep Power: 2684436	Looks like condensation. Moisture evaporating, and the cap is the cool spot where the moisture collects. Common problem with some oils with short trips. My one 5.7 Hemi is great at doing this Possible cause could be the ARC tank also. You can go to a shop and have them check the cooling system for combustion leak into the system. mag_black likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

02-04-2018, 05:21 PM	#28 (permalink)
mag_black A True Z Fanatic Join Date: Mar 2013 Location: Massachusetts Posts: 1,400 Drives: 09 370Z MT6 Rep Power: 666	Reporting back that I found the issue. My ARC catch can had water in the tank and it pulled it through the tubes. I have a video of me emptying out about 2-3 oz of water. I took it out and cleaned tubes and tank and left to dry. Tomorrow I will use the block tester after I put it back together just for comfiirmation. The next step is change oil out. Should I change oil and let it run a bit and then change again or will I will be fine with one oil change? __________________ fujimura ≠ abbeyRoadCompany ≠ fastIntentions ≠ motordyne ≠ avantGarde ≠ ecutek ≠ nismo ≠ stillen ≠ stoptech ≠ gtm ≠ spl ≠ carbonfiberelement ≠ stance™ Last edited by mag_black; 02-05-2018 at 03:52 PM.

02-04-2018, 05:52 PM	#29 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324197	Oil's not that expensive. I'd change twice if for no other reason than peace of mind. Felix 808 and mag_black like this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

02-04-2018, 06:12 PM	#30 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,873 Drives: 2011 Nismo GM 6M Rep Power: 2684436	If you change the oil twice. You will not get the moisture out. Unless you get the engine hot enough to evaporate the moisture that's on metal. mag_black likes this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

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