Somewhat Fixed ! Low Oil Pressure at Low Idle !

[YD2007]

(I wish one could change the title of a previous post, because I don't like creating another thread. I'm the same person who posted "Low Oil Pressure When Warm, Engine Shuts Off When < 10" )

I convinced the fixit guy to check/change the oil pump pickup tube O-Ring, based on many posts here that said "Changing O-Ring fixed my low oil pressure)...if it looked ok, then we'd go with a Jasper 3 yr/100K mi - warranted rebuilt ($7700).

The O-Ring (picture included) did indeed have a split in it.

Now, instead of warm idle being around 5 or on the low red mark, it's around 12-15. Should be higher, but that'll keep the engine from quitting, and that fix, with ~$100 labor investigating, plus $600 for changing O-Ring, beats $7700.

They also replaced the rear engine main seal - was leaking.

The advantage of going with thee rebuilt engine, is the Yukon would be a little easier to sell/trade in another year...wwe'll see what another year brings.

Dave H.

 

[MichaelSE]

Glad to hear it. Some mechanic once told me that replacing the oil pan gasket (or oil pickup o-ring for that matter, same process) on a 4x4/AWD 5.3/6.0/6.2 is rated at something insane like 12 hours of labor. So sounds like you got a good deal with $600.

Switch to high mileage rated synthetic oil if you haven't already.

 

[iamdub]

Cleaned the screen behind the oil pressure sensor? That being partially clogged will make the sensor read low.

 

[Jagsta]

I just did this and it fixed my low/no oil pressure at cold idle. LOL at a pro quoting 12 hours labor, it took me prob 8 but I was being slow and meticulous, no way a pro with a lift who works on cars day in and out takes 12 hours. Hardest part was maneuvering the front differential out of it's small space. You def need a small transmission jack to get it back in (I was able to remove with a regular jack and roping the diff off to the frame, ended up finding my old small Harbor Freight tranny jack later and using it on the re-install.). I took pictures and will make a guide available sometime soon, it's really pretty easy overall.

 

[JonnyTahoe]

You have to move the Differential on a 4X4 just to drop the pan ?

 

[HiHoeSilver]

You have to move the Differential on a 4X4 just to drop the pan ?

Sure do.

 

[JonnyTahoe]

I just did this and it fixed my low/no oil pressure at cold idle. LOL at a pro quoting 12 hours labor, it took me prob 8 but I was being slow and meticulous, no way a pro with a lift who works on cars day in and out takes 12 hours. Hardest part was maneuvering the front differential out of it's small space. You def need a small transmission jack to get it back in (I was able to remove with a regular jack and roping the diff off to the frame, ended up finding my old small Harbor Freight tranny jack later and using it on the re-install.). I took pictures and will make a guide available sometime soon, it's really pretty easy overall.

Looking forward to the pictures. I assume you used air tools, Impact wrenches, and you were able to do this on the Garage Floor with nothing more than floor jacks ?

 

[JonnyTahoe]

Sure do.

I just began the oil pan removal today.

 

[HiHoeSilver]

well that's not going to happen in my garage.

 

[JonnyTahoe]

Cleaned the screen behind the oil pressure sensor? That being partially clogged will make the sensor read low.