Need help to determine leak

ediddily · Post by **ediddily** » 20 Jun 2022, 10:41

2004 XC90 2.5T

I have a mystery motor oil leak that I need help figuring out where its coming from. On the attached photo I have marked where I have seen where the oil comes out of as a seap, the trail, and where it was dripping from.
My thoughts are the seal between the transfer case and transmission.
Or the rear main seal.
The turbo oil lines are fairly clean, just the usual wear and dirt.
No oil coming off the rear cam seals.
The PVC box is not clogged either.
Any other ideas or locations?

Post by **RickHaleParker** » 20 Jun 2022, 12:02

Dope the Oil with Tracer dye then use a Ultraviolet (UV) lamp to trace the leak back to the source.

ediddily · Post by **ediddily** » 20 Jun 2022, 18:13

Do I need the yellow glasses to really see the dye? I already have a UV light.

Post by **RickHaleParker** » 20 Jun 2022, 19:39

ediddily wrote: ↑20 Jun 2022, 18:13 Do I need the yellow glasses to really see the dye?

Depends on if you have more then three active brain cells or not. Are you going to be shining high intensity light directly in your eyes?

Yellow glass is a gimmick to sell sunglasses at inflated prices. Yellow glasses are suppose to block UV light but then again so do all sunglasses. They are suppose to enhance your vision but that was debunked a long time ago.

The whole system works the same as black light posters. Do you need yellow glasses for viewing black light posters?

Nowadays the same scam is being repeated with Blue light blocking glasses.

Maye I should start selling Tin foil lined caps that block the bad vibes.