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Can too much oil cause a blown gasket

Tiny
CHAD RUSSELL
  • MEMBER
  • 2009 MINI CLUBMAN
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 72,000 MILES
I recently put about a quart too much oil into the car (stupidly I know) it developed a small oil leak then today the oil leak became huge. It seems to be from coming from the passenger side somewhere under the valve cover. The oil pressure warning nor the temperature warning has gone off yet, but I am sure it is on it's way to overheating the next time it is driven. Some symptoms include either blue or white smoke out the exhaust, it is hard to tell, a slightly rough start up, and, of course, the profuse amount of oil leaking out of the side of the engine. What are some possible fixes for this. Also, I recently replaced the radiator and I am not loosing coolant at all.
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Sunday, January 15th, 2017 AT 12:52 AM

19 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
If you have too much oil it can cause oil to burn out the exhaust and rough running. Have you reset to oil to the proper level yet? Also, it is hard to say what is leaking oil without seeing where the oil is coming from.
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Sunday, January 15th, 2017 AT 2:17 AM
Tiny
CHAD RUSSELL
  • MEMBER
  • 11 POSTS
I am going to be draining it today, but I thing the leak actually dropped it down to a normal level after checking the dipstick. I am going to be looking at it in a few hours to see exactly where it is coming from. I will post an update as soon as I know where.
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Sunday, January 15th, 2017 AT 11:40 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Okay, sounds good.
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Sunday, January 15th, 2017 AT 2:43 PM
Tiny
CHAD RUSSELL
  • MEMBER
  • 11 POSTS
I believe the oil is coming from the blow by and if I take the oil cap off while the car is running, I can hear air release. If I am not mistaken I think this means I have crankcase pressure. Any ideas?
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Sunday, January 15th, 2017 AT 3:03 PM
Tiny
CHAD RUSSELL
  • MEMBER
  • 11 POSTS
I believe the oil is coming from the blow by and if I take the oil cap off while the car is running, I can hear air release. If I'm not mistaken I think this means I have crankcase pressure. Any ideas?
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Sunday, January 15th, 2017 AT 3:03 PM
Tiny
CHAD RUSSELL
  • MEMBER
  • 11 POSTS
I think the PCV might be clogged.
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Sunday, January 15th, 2017 AT 3:13 PM
Tiny
JOHNNY G.JR
  • MECHANIC
  • 320 POSTS
Very well could be clogged.
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Sunday, January 15th, 2017 AT 6:27 PM
Tiny
CHAD RUSSELL
  • MEMBER
  • 11 POSTS
Is any of that milky build up cause for concern? I know about cold water sludge, but that seems a bit much to me. Though there is none on the rocker arms or in the dipstick.
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Sunday, January 15th, 2017 AT 7:02 PM
Tiny
JOHNNY G.JR
  • MECHANIC
  • 320 POSTS
Change oil next chance you get. Get it nice and hot first and be careful.
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Sunday, January 15th, 2017 AT 7:27 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
Ye ole milky goop,

May be the combustion gases (which includes water) not being evacuated out of the crankcase via the PCV system.

As the others said, the vacuum to the PCV may be stopped up (carbon/ kinked/ old hose is sucking flat). Or even the fresh air line may be kinked/ stopped up/ or it has been plugged off. In some cases I have seen folks use a second PCV as an elbow for their fresh air, the problem doing that is the air flow is backwards and the PCV "checks" (basically it closes the second PCV and no air can flow).

The Medic
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Sunday, January 15th, 2017 AT 8:21 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Check and see if there is any blockage in the PCV, if there is excessive engine crank case blow by caused by engine that can take into plug oil leakage from there. If the oil is not milky then I would not worry so much about the milky stuff. How often do you change the oil? Also, when was the last time you changed the oil?
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Sunday, January 15th, 2017 AT 10:45 PM
Tiny
CHAD RUSSELL
  • MEMBER
  • 11 POSTS
The oil has not been changed in a while, this is my fairly new girlfriends car and I have not seen an oil change on it. Though I did take it to a mechanic and he said that the tensioner came loose and was spitting out oil onto the exhaust. There is a TSB specifically for that so I had him replace the tensioner and the seal. No more oil leak or smoke. The milkiness was just from making short trips where the engine could not heat up enough to burn away condensation in a cold very wet area. Thank you all for the replies and help!
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Monday, January 16th, 2017 AT 12:35 PM
Tiny
SATURNTECH9
  • MECHANIC
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You are welcome. Like I said there can be some milkiness, but when you get it on the oil dipstick then that is really not good.
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Monday, January 16th, 2017 AT 12:38 PM
Tiny
CHAD RUSSELL
  • MEMBER
  • 11 POSTS
No head gasket problems. There is a TSB on the tensioner. In some models, including this one, it comes loose and lets oil out over the exhaust. It is in the shop now getting replaced.
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Monday, January 16th, 2017 AT 1:12 PM
Tiny
JOHNNY G.JR
  • MECHANIC
  • 320 POSTS
Well done, glad to hear.
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Monday, January 16th, 2017 AT 1:54 PM
Tiny
CHAD RUSSELL
  • MEMBER
  • 11 POSTS
The PCV was kinked so I replaced it. But that wasn't the main problem. There is a TSB on mini's about their tensioners loosening and causing a massive oil leak. The oil then leaks onto the exhaust. I resealed it, oil leak and smoke out the tailpipe stopped. Thank you everyone for your replys and your help!
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Friday, January 20th, 2017 AT 11:50 AM
Tiny
CHAD RUSSELL
  • MEMBER
  • 11 POSTS
Sorry for the multiple replies, my Internet was acting strange and I didn't see that they actually posted!
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Friday, January 20th, 2017 AT 11:51 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,840 POSTS
No problem,

Thanks for using 2CarPros we are to help, tell a friend.

Best, Ken
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Monday, January 23rd, 2017 AT 12:14 AM

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