What? A power steering pump oil cooler? I've never heard of such a thing. Does your truck have a cooler for the windshield washer fluid too? lol
But seriously ... Check your pressure line from the pump and also the fittings on that line. What year truck and what size motor?
Tail end of the OP
. 00 4.7 Sport 4x4. Yea, an oil cooler for the PS, I know.
. I could actually have made a new one, with type K copper and silver solder, I AM a plumber after all. The latter would never leak, and what actual benefit there is to the thing, well, that's a mystery to me as well, but, it came with it. It is my understanding that Mercedes made this engine via Daimler? That would go a ways toward explaining such ...over engineering...of accessory systems. Das is goot ya? Ihave to pull a BUNCH of things out of the way to get a good look at the thing, so, I'm sure I'll track down the culprit, and, if it is the cooler, I have a ready made swap. If I find a leaky line, or fitting, I have all kinds of braided stainless line and fittings on the shelf, so I will bid adieu to any rubber line and hose clamps in favor of something....original...to my shop. I am a bit new to the under hood area of my lil' truck, other than oil swaps and such, but I am feeling adventurous these days and want to start working on the thing with more zeal.
LMAO, when it comes to these new outfits, al I can say is God bless Vicodin