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Strange oil level issue

04BlackMagic

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04BlackMagic Enthusiast

04BlackMagic

Posted
Posted

05 Tahoe 5.3 LM7 150,000 miles

 

“Check engine oil level” came on on DIC about 2 weeks ago. I checked oil level but it was good. Thought it was oil level sensor cropping out and didn’t think it was big deal. Now yesterday I saw a puddle of engine oil where I park vehicle. Pulled dipstick today and NOTHING WAS ON DIPSTICK. However I pulled drain plug and 3.5 qts came out. Truck calls for 6 qts. Small puddle, but lots of oil lost within short amount of time.

 

Do these engines have issues with oil consumption commonly?

 

Thanks

 

 

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greatmizzou Enthusiast

greatmizzou

Posted
Posted

I was always told the dipstick measure bar is about 1 liter in size.  If you have no oil, it could be anywhere from bone dry to 1 liter short.   I imagine you may have misread the dipstick, I need to wipe mine off and reinsert several times before i get a good read.

 

my 5.3 takes about 6 liters to fill up from each oil change.  I think my low oil light comes on when I’m at 4 litres

 

 

 

sefiroxx Enthusiast

sefiroxx

Posted
Posted

If no visible leaks, then .5 q/5000 miles would be normal , most of this would be via oil mist through pvc

As trucks, with the tendency to jump a few curbs etc, the flexing eventually leads to seepage on and number of gaskets. I'm on my 5th and every one of them eventually seeped and steadily worse until resealed. Current Sierra at 190k is losing .75 /5000 plus the .5 misting.. I my case, 2 valve cover gaskets and a rear main oil seal are needed.

04BlackMagic Enthusiast

04BlackMagic

Posted
  • Author
Posted

Update: isolates oil leak to oil filter housing. Removed old oil filter(came off with o ring) and put on a new one pre filled with oil. Ran engine and saw oil slowly start to drip from top of oil filter housing. Anyone have any past experience in this location with a leak?


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txab Senior Enthusiast

txab

Posted
Posted

Did you check for the presence of another seal stuck to the filter mounting base?

WT16 Enthusiast

WT16

Posted
Posted

Could be cross threaded, not tight enough, or you left the old seal on. Most seals are a pain to get off but please check. You would know if its cross threaded and the tightening issue? Check the box or filter or manual for proper tightning. Good luck

swathdiver Senior Enthusiast

swathdiver

Posted
Posted
On 1/8/2019 at 6:32 PM, 04BlackMagic said:

 

05 Tahoe 5.3 LM7 150,000 miles

 

“Check engine oil level” came on on DIC about 2 weeks ago. I checked oil level but it was good. Thought it was oil level sensor cropping out and didn’t think it was big deal. Now yesterday I saw a puddle of engine oil where I park vehicle. Pulled dipstick today and NOTHING WAS ON DIPSTICK. However I pulled drain plug and 3.5 qts came out. Truck calls for 6 qts. Small puddle, but lots of oil lost within short amount of time.

 

Do these engines have issues with oil consumption commonly?

 

Thanks

 

 

Sent from my iPhone using Tapatalk

 

That's not consumption problem, that's a leakin' problem!  

 

Yes, some LS engines are known to drink a lot of oil, especially when revved above 3000-4000 rpms regularly.

Bill336 Enthusiast

Bill336

Posted
Posted

You haven't by chance changed your oil brand, or from dino oil to a synthetic, have you? I've seen this happen with 2 other GM vehicles (neither had a 5.3) when I attempted to change from dino to synthetic. Changing back to dino oil stopped the problem.

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