Todays Project - What did you do today?

[Highpower]

Nice find Greg. A rather unusual occurrence in a rear end. (Depending on how much HP is being delivered to the final drive of course.)  

Reminds me of a Honda Odyssey that came back to the dealership several times with a complaint from the owner of a coolant leak. Three other techs tried different "repairs" but it kept coming back. So then they gave it to me...

I found it only leaked after the engine reached a certain temperature. The coolant dripped from the bottom of the transmission bell housing. It took awhile but I finally traced it back to the top of the aluminum V-6 engine block (underneath the intake manifold) at the rear of the engine. The coolant would fill up a small valley in the top of the block, then spill over the back of the block and run down into the trans housing. All out of sight because all the coolant was hidden under the intake and between the engine and transmission.

Long story short - some ultraviolet dye added to the cooling system revealed that the coolant was seeping through a porous engine block casting. No visible cracks at all. The owner got a new engine block under warranty and I got a few days of banging my head against the wall over it.