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Oil Leak Somewhere Above Oil Filter

gw1500se

By gw1500se
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gw1500se Enthusiast

gw1500se

Posted
Posted

My 2000 GMC Sierra 1500 (4.8L V-8) has developed an oil leak somewhere above the oil filter (not the filter itself). I cannot see any leak around the valve cover (both gaskets were replaced recently) nor around the head gasket. I have not been able to examine it from below very well yet but I'm wondering if the filter housing is a separate part attached to the block and uses a gasket rather than being machined into the block itself. If not a separate part where the gasket can fail I have no clue where the leak could be coming from. Can someone confirm my theory or suggest where in that area a leak might originate? TIA.

newdude Senior Enthusiast

newdude

Posted
Posted (edited)

Filter housing is of no such if you will on LS engines. The filter screws right into a machined portion of the oil pan casting. You could have a leaking oil pan gasket, or there is a blocker plate (or oil cooler lines) that are right above the oil filter. The gasket there could be leaking.

Edited by 15HDriver
gw1500se Enthusiast

gw1500se

Posted
  • Author
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Ah, thanks. I could not tell from my cursory look that it was part of the oil pan. Hopefully it is not the pan gasket. It does not look like an easy thing to replace.

The Zip Senior Enthusiast

The Zip

Posted
Posted

You could have a leaking oil pan gasket...

 

^^^Just replaced a leaky oil pan gasket, '01 5.3 Chevy. For a 100 bucks, I got my favorite oil, filter, and a good gasket then spent another 100 for labor to include blasting out the pan.

gw1500se Enthusiast

gw1500se

Posted
  • Author
Posted

After a bit more observation, I now doubt it is the pan. It seems like it only leaks after the engine has been running. That implies the leak is occurring where and when there is oil pressure. Since there is no pressure in the pan, that means it would be around the previously mentioned blocker plate where I assume there is pressure.

  • 2 years later...
  • 3 months later...
Lyle Privette New Member

Lyle Privette

Posted
Posted

Help !
My 2005 Chevy Silverado with only 85,000 miles has never leaked oil in between oil changes, all of a sudden the oil is just running out somewhere above the oil filter and oil pan. What could it be ?

txab Senior Enthusiast

txab

Posted
Posted (edited)
On 4/24/2017 at 7:39 AM, newdude said:

Filter housing is of no such if you will on LS engines. The filter screws right into a machined portion of the oil pan casting. You could have a leaking oil pan gasket, or there is a blocker plate (or oil cooler lines) that are right above the oil filter. The gasket there could be leaking.

Read the quoted text

 

 Of course make sure it's not the filter or gasket itself. Make sure the old gasket was removed with the old filter.  Also check for oil pressure sending unit leaking and running down.

Edited by txab
  • 1 year later...
Sharty_McQueef New Member

Sharty_McQueef

Posted
Posted (edited)

It’s a pretty easy fix, make sure you buy the replacement AC Delco gasket. 
 

Be aware that if your truck has a factory installed oil cooler there are a couple more steps but it’s as easy as removing the two bolts above the housing, cleaning and replacing the gasket. 
 

This should help show you how it’s done and how to reach those bolts the easiest:

https://youtu.be/hVf_dXjfow0

Edited by Sharty_McQueef
  • 10 months later...
Dusty56 New Member

Dusty56

Posted
Posted

Is there a drip pan below your oil filter? light came on yesterday saying to check oil low I took too dealership and he said my gasket on oil filter bubbled up after getting so hot and my oil leaked into a drip reservoir above the oil filter

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