Purchased a 2007 Yukon XL, now to make it reliable!

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

OR VietVet

Multnomah Falls
Supporting Member
Military
Joined
Oct 8, 2014
Posts
20,508
Reaction score
35,882
Location
Willamette Valley
You are correct! It looks like it’s coming from the oil cooler block off. I’m going to replace the gasket and go from there.
IMO, I would not reuse the plate because it is likely warped and will leak again. Buy a Billet plate and a new o-ring seal and call it good. Clean the old oil off the whole area and then keep an eye on it for future leaks.
 
OP
OP
Y

YukonGold12

Member
Joined
Aug 1, 2024
Posts
48
Reaction score
91
Changed the block off gasket. Drove 180 miles. No more leaks from that section anymore. Now some oil accumulating at the base of the pan and at the top around those bolts. Going to need to track those down, there isn’t oil under the car anymore after it sits for some time. Which seems to be resolved from that gasket replacement.

It looks like there is something accumulating around the diff. I had cleaned that area last night when I changed the oil.
 

Attachments

  • IMG_8436.jpeg
    IMG_8436.jpeg
    307.2 KB · Views: 6
  • IMG_8431.jpeg
    IMG_8431.jpeg
    327.3 KB · Views: 5
  • IMG_8432.jpeg
    IMG_8432.jpeg
    289.7 KB · Views: 6
OP
OP
Y

YukonGold12

Member
Joined
Aug 1, 2024
Posts
48
Reaction score
91
Worked on the truck again today.
- Changed spark plugs and spark plug wires
- MAF sensor cleaned
- Air filter replaced

That #8 plug was kind of a pain, but I decided early on I was going to attack it from the wheel well, removing the liner and everything made that easy.

Old plugs were toast. I've attached some pictures of the plugs and I scoped the cylinders for y'alls enjoyment.

The engine seems to be idling much better, although still some work to be done.
 

Attachments

  • Image_2024-08-22 12_37_38_425.jpeg
    Image_2024-08-22 12_37_38_425.jpeg
    83.6 KB · Views: 4
  • Image_2024-08-22 12_37_48_016.jpeg
    Image_2024-08-22 12_37_48_016.jpeg
    122.4 KB · Views: 4
  • Image_2024-08-22 12_37_56_329.jpeg
    Image_2024-08-22 12_37_56_329.jpeg
    64.2 KB · Views: 4
  • Image_2024-08-22 12_38_14_994.jpeg
    Image_2024-08-22 12_38_14_994.jpeg
    69.6 KB · Views: 3
  • Image_2024-08-22 12_38_20_360.jpeg
    Image_2024-08-22 12_38_20_360.jpeg
    94.8 KB · Views: 3
OP
OP
Y

YukonGold12

Member
Joined
Aug 1, 2024
Posts
48
Reaction score
91
The rest of the cylinders.
 

Attachments

  • Image_2024-08-22 12_41_28_451.jpeg
    Image_2024-08-22 12_41_28_451.jpeg
    75.6 KB · Views: 2
  • Image_2024-08-22 12_42_09_961.jpeg
    Image_2024-08-22 12_42_09_961.jpeg
    102.8 KB · Views: 2
  • Image_2024-08-22 12_44_02_583.jpeg
    Image_2024-08-22 12_44_02_583.jpeg
    70.8 KB · Views: 2
  • Image_2024-08-22 12_44_09_293.jpeg
    Image_2024-08-22 12_44_09_293.jpeg
    123.5 KB · Views: 2
  • Image_2024-08-22 12_45_21_396.jpeg
    Image_2024-08-22 12_45_21_396.jpeg
    74.8 KB · Views: 1
OP
OP
Y

YukonGold12

Member
Joined
Aug 1, 2024
Posts
48
Reaction score
91
Spark plugs 1,3,5,7
 

Attachments

  • IMG_8477.jpeg
    IMG_8477.jpeg
    348.8 KB · Views: 3
  • IMG_8478.jpeg
    IMG_8478.jpeg
    326.8 KB · Views: 3
  • IMG_8479.jpeg
    IMG_8479.jpeg
    293.2 KB · Views: 3
  • IMG_8480.jpeg
    IMG_8480.jpeg
    332.7 KB · Views: 3
OP
OP
Y

YukonGold12

Member
Joined
Aug 1, 2024
Posts
48
Reaction score
91
Spark plugs 2,4,6,8
 

Attachments

  • IMG_8481.jpeg
    IMG_8481.jpeg
    340.8 KB · Views: 3
  • IMG_8482.jpeg
    IMG_8482.jpeg
    333.7 KB · Views: 3
  • IMG_8483.jpeg
    IMG_8483.jpeg
    346.2 KB · Views: 2
  • IMG_8484.jpeg
    IMG_8484.jpeg
    319.2 KB · Views: 3

Forum statistics

Threads
131,743
Posts
1,856,008
Members
95,992
Latest member
7RPM
Top