Jump to content

2009 GMC 5.3L #7 Cylinder oil consumption

guygodwin

Recommended Posts

guygodwin Enthusiast

guygodwin

Posted
Posted

Good afternoon gear heads,

I've got a 2009 Sierra with the 5.3 Liter engine. I just turned over 300,000 miles two weeks ago. Basically, I've had very few problems but obviously that's about to change.

 

This morning I had an engine mis-fire in #7. I also noted that I was puffing quite a bit of smoke. I wasn't surprised to see the #7 spark plug covered in oil.

 

I'm guessing that oil is probably draining into the cylinder from around a valve guide or something. Does anyone have any simple ideas or suggestions? I've already been looking to replace the vehicle. But, i still need to drive it in the mean time.

 

Suggestions are welcomed.

 

 

Sent from my iPhone using Tapatalk Pro

  • Replies 33
  • Created
  • Last Reply
guygodwin Enthusiast

guygodwin

Posted
  • Author
Posted

104111985034e85dc26a7fcbefd2386a.jpg here is a picture of a brand new spark plug was installed. The misfire wheat away. (Temporarily I assume) it was run for about 60 seconds and pulled out. You can see the oil on the threads and ceramic/electrode tip.

 

 

Sent from my iPhone using Tapatalk Pro

newdude Senior Enthusiast

newdude

Posted
Posted

Ever changed the driver's side valve cover? GM redesigned the PCV baffles inside the cover to control oil on driver's side, especially cyl. 7.

guygodwin Enthusiast

guygodwin

Posted
  • Author
Posted

It hasn't been touched. But, please explain. How does the one reach the threads? I don't see any leakage on the outside.

 

 

Sent from my iPhone using Tapatalk Pro

guygodwin Enthusiast

guygodwin

Posted
  • Author
Posted

From what i can tell it appears the valve cover was already changed. I had some warranty work done back at 90K miles. I assume it was changed then.

 

 

Sent from my iPhone using Tapatalk Pro

733c48479ed915428e506ac6f574587d.jpg

 

 

Sent from my iPhone using Tapatalk Pro

guygodwin Enthusiast

guygodwin

Posted
  • Author
Posted

Could this be a sign that a valve guide is having problems? It is located just above the spark plug in question. I don't see another are of residue like that anywhere.04a8eeb8af262f5e582310d161b4bbd2.jpg

 

 

Sent from my iPhone using Tapatalk Pro

MaverickZ71 Senior Enthusiast

MaverickZ71

Posted
Posted

From the photo, it looks like you do have the newer valve cover with the revised PCV orifice. Frankly, as the owner of an 09 with 63K miles with bad oil usage problems, I'm amazed you made it to 300K without more problems, especially if you don't have the AFM turned off, aren't running an oil catch can in your PCV system, don't have the deflector installed in your oilpan, and aren't using Dexos1-rated oil.

guygodwin Enthusiast

guygodwin

Posted
  • Author
Posted

I think the deflector has been added back when the warranty work was completed. I've dealt with the clogged up oil net under the oil sending unit about 6 times. But other than that. It's been pretty solid.

 

 

Sent from my iPhone using Tapatalk Pro

guygodwin Enthusiast

guygodwin

Posted
  • Author
Posted

With all that being said. I'm buying another vehicle today.

 

I've got a 2009 daily driver on 7/8th of a 5.3 Liter. New transmission, $2K in Enkei/Michelins. Everything else works and is good.

 

I need to fix this motor so I can sell it. Any ideas? Pull the head and check the valves/Guides? I need to fix the oil from bleeding into the cylinder just so I can get it running on 8 cylinders again then I can sell it.

 

 

Sent from my iPhone using Tapatalk Pro

muddkatt Senior Enthusiast

muddkatt

Posted
Posted

Pull the head and send it to a machine shop to re-work. While the head is off, and before shipping it to the shop, check cylinder wall for issues.

 

Have shop locate the problem on the head. If there are no issues after tear down......then you have a real problem.

diyer2 Senior Enthusiast

diyer2

Posted
Posted

MY 2 cents.

Pull all the plugs. Get an inspection camera, rent, borrow one. Run #7 piston to bottom of stroke. Inspect cylinder walls with bore scope.

If good head rebuild as mentioned.

guygodwin Enthusiast

guygodwin

Posted
  • Author
Posted

All the plugs look good except for #7.

 

This also occurred just after pulling a boat for the first time is a couple years. Just an average sized bass boat. But there was a different load put on the engine. Also had a different shift pattern between i the rowing mode.

 

I'm thinking that if Compression is Good then that should be another indicator it is head related. I can't imagine the oil is coming up through the piston/rings from the bottom.

 

 

Sent from my iPhone using Tapatalk Pro

Dnt Senior Enthusiast

Dnt

Posted
Posted

Plug looks pretty good man it almost looks like the plug just is not firing and allowing the oil to build up on it. I would simply replace the plug / plug wire and check the coil. IF you had a big oil burning issue your plug would look like this

post-127028-0-32940400-1475571806_thumb.jpg
That was out of my 2009 5.3 aluminum block oil burner at 75k miles I believe that was out of cylinder #3 These plugs are very easy to damage and any hairline crack in the ceramic will cause a misfire

post-127028-0-32940400-1475571806_thumb.jpg

post-127028-0-32940400-1475571806_thumb.jpg

guygodwin Enthusiast

guygodwin

Posted
  • Author
Posted

The picture I posted is a brand new plug after 60 seconds of running the engine.

 

Plus it is really smoking. The misfire, is not my concern.

 

 

Sent from my iPhone using Tapatalk Pro

muddkatt Senior Enthusiast

muddkatt

Posted
Posted

I had a 5.7L engine that had the second and third land fail due to detonation while under heavy load. Scored the cylinder wall, started pumping oil into both the cylinder and the air cleaner. The cause was the knock sensor either adjusting timing wrong or not adjusting it at all due to an exhaust leak at the donut gasket.

 

So yes, it could be the piston and rings letting the oil come through.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • asilverblazer
      Is the 6.2L L87 in a 2026 Sierra 1500 ok?

      By asilverblazer · Posted

      What meaningful corrections were done to fix the "machining errors?"   I bet nothing, because the 6.2 is soon to be obsolete. Why would GM implement any fix let alone an "expensive one?"   Until someone can provide any convincing information that GM did ANYTHING to correct the engines - the 6.2 is no for me.    Which means keeping the 2016 Denali longer until the next generation (6.6?) proves itself.
    • KARNUT
      The Peckish Synapse

      By KARNUT · Posted

      If my father took a Sunday off. We did the Sunday drive. Usually stopping at a Geno’s for dinner that we eat in the car. Six of us with my little sister up front. It was always a Buick growing up. In New Jersey you couldn’t get lost. Not like Texas.
    • Atlas
      Gas Prices

      By Atlas · Posted

      Hoooooooly smokes, batman!    
    • Grumpy Bear
      Some Assembly is Required

      By Grumpy Bear · Posted

      I suppose I am Atlas. It can always be worse, eh?   I had a friend once that rolled one payment into another until he was paying the price of Benz for a 10 year old back marker. Wouldn't be often you start a new payment the month following your old one. 
    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      I still enjoy the drive   Some people fish when they retire; some golf. I drive. We've lived in the same general area now for twenty eight years and I'm still finding at least monthly some sweet quite little road to explore. When I tell the Mrs. I'm heading out for coffee she knows that could be a five hour event. Often she even goes along.    I like finding new rural routes used mainly by the locals that start nowhere in particular and end the same way. Many in the area of that type are narrow paved and twisty, hilly and run through field and timber. Often along creeks or wetlands. Unfarmable areas of great natural beauty.    After years of this type of exploration they start to fit together. One ending a mile or so from another and you start threading together a new path from a unfamiliar place to a new adventure. Sometimes to a little town of under five hundred that used to be something before the Interstate or some railroad or US highway bled the life out of it that has a small dinner with the greatest slice of pie you've eaten since grandma made her last. A little village museum or library or even a town square park with grand old oak, walnut and Osage orange trees to sit under while you sip you gas station coffee and chat up some locals.    Often they are full of stories about the main streets more interesting buildings and the who's who of the area. Sometimes some hidden attraction or unseen history. Our area is full of old coal mines.     A younger self used to do this going cross country by motorcycle. Only a general area as a destination with no time to get there and no time to be back. Sitting at days end in a 10 unit off the main highway motel under a Sycamore tree yacking with the owner or his one semipermanent guest while I adjusted valves or the chain. Always a wave and a shout "Hey there stranger"!  It's how I came by my love of old Brit iron. There is no such things as a ten minute gas stop when your on a Enfield or a vintage Triumph. Same being true of old cars.    If you take the time to really look I've found everywhere is someplace interesting. Illinois or West Virginia. Different and yet the same.    People are in a more relaxed mood and will talk about anything and everything and if they like you there may be a cupp'a or a lemonade and a sandwich in it. 😉 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...