Mike "Wuzzy121". Rest in peace, brother

Go Back   Tacoma World Forums > Tacoma Discussion > 2nd Gen. Tacomas

Notices

Oil Leak Up Top

Reply
 
Thread Tools Search this Thread
Old 05-02-2013, 01:32 PM   #1
Junior Member
Gordon Leverich is on a distinguished road
Name: Gordon
Joined: May 2013, #103348
Location: Los Angeles
Gender: Male
Posts: 4
Gordon Leverich's Tacoma Gallery
Oil Leak Up Top

Hi,
Does anyone have experience with oil leaking around the coil packs on a 2006 2.7L 4 cylinder engine? I have 40K miles. It seems PCV related. It gets worse with a new PCV valve installed. The PCV intake hose path is clear when I blow into the crankcase, and the PCV vacuum is strong when I take it off of the PCV valve. Right now I am running a drilled out PCV valve with a hose venting the crankcase to the outside, with the PCV Vacuum line plugged. This gives me the minimum oil leak. When I open the oil filler cap while the engine is running, there is lots of air coming out there. My other car (Buick V6) has no air coming out when I do this test. I don't think my Tacoma air out the filler is normal but it runs great, especially with the PCV vacuum line plugged. Any insight would be appreciated.

Thanks all. Gordon
  Reply With Quote
Old 05-02-2013, 02:02 PM   #2
AKA ::1
127.0.0.1 is one of the sharper tools in the shed127.0.0.1 is one of the sharper tools in the shed127.0.0.1 is one of the sharper tools in the shed127.0.0.1 is one of the sharper tools in the shed127.0.0.1 is one of the sharper tools in the shed127.0.0.1 is one of the sharper tools in the shed127.0.0.1 is one of the sharper tools in the shed127.0.0.1 is one of the sharper tools in the shed127.0.0.1 is one of the sharper tools in the shed127.0.0.1 is one of the sharper tools in the shed127.0.0.1 is one of the sharper tools in the shed
 
127.0.0.1's Avatar
Air Force: 12th TIS
Joined: Dec 2012, #93641
Location: /etc/hosts
Gender: Male
Posts: 1,048
127.0.0.1's Tacoma Gallery
oil where it shouldn't be, oil cap off, feel small wind ? head gasket has blown
  Reply With Quote
Old 05-02-2013, 04:17 PM   #3
Senior Member
Jimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shed
 
Jimmyh's Avatar
Navy: MT1 (SS) retired
Joined: May 2012, #78991
Location: SC
Gender: Male
Posts: 2,382
Jimmyh's Tacoma Gallery
Quote:
Originally Posted by Gordon Leverich View Post
Hi,
Does anyone have experience with oil leaking around the coil packs on a 2006 2.7L 4 cylinder engine? I have 40K miles. It seems PCV related. It gets worse with a new PCV valve installed. The PCV intake hose path is clear when I blow into the crankcase, and the PCV vacuum is strong when I take it off of the PCV valve. Right now I am running a drilled out PCV valve with a hose venting the crankcase to the outside, with the PCV Vacuum line plugged. This gives me the minimum oil leak. When I open the oil filler cap while the engine is running, there is lots of air coming out there. My other car (Buick V6) has no air coming out when I do this test. I don't think my Tacoma air out the filler is normal but it runs great, especially with the PCV vacuum line plugged. Any insight would be appreciated.

Thanks all. Gordon
You should not be able to blow through the PVC into the "crankcase" valve cover. The PCV acts as a metering valve and check valve. The check should allow flow from the valve cover to the intake and prevent flow from the intake into the valve cover. It seems that you have the PCV backwards. The PCV being installed backwards or plugged will cause this excess pressure which will blow oil past the gaskets and seals.
  Reply With Quote
Old 05-03-2013, 01:37 PM   #4
Junior Member
Gordon Leverich is on a distinguished road
Name: Gordon
Joined: May 2013, #103348
Location: Los Angeles
Gender: Male
Posts: 4
Gordon Leverich's Tacoma Gallery
Sorry I was not clear - when I said the PCV intake was clear to the crankcase, I meant with the PCV valve removed. When I blow into the hose (disconnected) from the air cleaner to the valve cover I get air out the PCV valve opening with the PCV valve removed. It appears that the PCV system is working properly but that I have too much pressure underneath the valve cover.
Thanks.
Gordon
  Reply With Quote
Old 05-03-2013, 04:07 PM   #5
Senior Member
Jimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shed
 
Jimmyh's Avatar
Navy: MT1 (SS) retired
Joined: May 2012, #78991
Location: SC
Gender: Male
Posts: 2,382
Jimmyh's Tacoma Gallery
Well that can't be good. If you truly have excessive blow by as evidenced by the windstorm coming out of the oil fill cap opening the rings could be shot. Have a compression test done.

As for the oil leak itself, it is pretty normal to get a slight bit up around the spark plugs, but it shouldn't be very much. Post a picture so we can see what we are discussing. You may just need a new valve cover seal set and gasket.
  Reply With Quote
Old 07-06-2013, 12:10 PM   #6
Junior Member
Gordon Leverich is on a distinguished road
Name: Gordon
Joined: May 2013, #103348
Location: Los Angeles
Gender: Male
Posts: 4
Gordon Leverich's Tacoma Gallery
Hi guys,
Having replaced the leaking water pump, I am back to the oil leak problem. Have been unable to log in so I don't know if there are any new posts to my original question. JimmyH - are you referring to the long 4-hole seal that is under the valve cover? It seems odd that it would go out on all 4 seals at once. Does anyone have a 2.7L 4 cylinder they would like to run with the oil filler cap off to see how much air blows out of it? My truck blows so much air I think it has to be the cause of the oil leaking around the coil pack seals, as opposed to the seals themselves. If you do run your engine with the cap off be careful of spraying oil, at least mine does.
Thanks.
Gordon Leverich
  Reply With Quote
Old 07-07-2013, 07:48 AM   #7
Senior Member
Jimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shedJimmyh is one of the sharper tools in the shed
 
Jimmyh's Avatar
Navy: MT1 (SS) retired
Joined: May 2012, #78991
Location: SC
Gender: Male
Posts: 2,382
Jimmyh's Tacoma Gallery
Quote:
Originally Posted by Gordon Leverich View Post
Hi guys,
Having replaced the leaking water pump, I am back to the oil leak problem. Have been unable to log in so I don't know if there are any new posts to my original question. JimmyH - are you referring to the long 4-hole seal that is under the valve cover? It seems odd that it would go out on all 4 seals at once. Does anyone have a 2.7L 4 cylinder they would like to run with the oil filler cap off to see how much air blows out of it? My truck blows so much air I think it has to be the cause of the oil leaking around the coil pack seals, as opposed to the seals themselves. If you do run your engine with the cap off be careful of spraying oil, at least mine does.
Thanks.
Gordon Leverich
I'll check mine in a bit and get beck with you. Yes these arre the seals I am referring to.

Edit:

I just went out and started it up, removed the oil fill cap and checked and there is blow-by. Nothing to the amount I would be alarmed about however. Pretty normal IMO. I did not rev it up, but I imagine that if I did there would be some oil that would get blown out. That is on my 2012 with 7,600 miles on the clock.

That being said have a reputable shop do a compression check on all four cylinders and that will tell the true tale of what is going on. If the compression check is good, I would replace the valve cover seals and gaskets and call it good!
  Reply With Quote
Old 07-08-2013, 01:05 PM   #8
Junior Member
Gordon Leverich is on a distinguished road
Name: Gordon
Joined: May 2013, #103348
Location: Los Angeles
Gender: Male
Posts: 4
Gordon Leverich's Tacoma Gallery
Thanks Jimmy. I do a compression check next weekend and see how she reads.
Gordon
  Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Oil Leak BassAckwardsDyl 2nd Gen. Tacomas 37 01-21-2013 07:42 AM
Oil leak, got worse after changing oil Saltlick 1st Gen. Tacomas 21 10-25-2011 06:30 AM
Oil leak from front crankshaft oil seal? bigmooze Technical Chat 4 07-13-2011 03:19 PM
Oil leak taco_man Technical Chat 1 10-20-2010 05:28 PM
Oil leak a rear of oil pan. airforceone New Members 0 03-16-2010 07:23 PM


Copyright © 2014 Tacoma Forum. Tacoma World is not owned by, or affiliated with Toyota Motor Corporation.