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Yes the vent will be oily. It is a vent. There shouln't be a tube at the end of the cylinder head. There should be a small hose with a black plastic vent that directly connects to the top of the ptu vent itself. Unless the previous owner added a hose and ran it into the engine compartment....like most of us have when we changed our fluid. Also quite a few of us have drilled and tapped the PTU case for a easier drain.
made the switch myself recently. Coolant temps are around 10-12° cooler across the board since the switch. Also drops down much faster after spirited driving. Highest coolant temp I’ve seen since switching is ~208°
That seems unlikely since the orange was actually better at heat rejection. It just wasn't as good at keeping heater cores and water pumps from failing. Perhaps you had your system fully flushed when changing over to the yellow and now it's operating more efficiently.
which? I changed out from orange in my F 150. I hate that $h1t. I decided to get over the counter fluid not the extra fancy Ford gold. I went with prestone. Why? Because it's worked fine in all vehicles for more decades than I've been alive. I found the orange stuff kinda gunky.
I don't use my local dealer for anything anymore. They couldn't even rotate my tires correctly. Last time they had it, they scraped the right lower fender on something and then denied it. They also tore up the under engine cover.
I did flush it when I swapped it out, but I’m not the only one to report lower temps after the switch. Coolant was flushed (not by me) prior to switching to yellow, and orange was replaced, and temps (higher than with the yellow) remained the same with the new orange. Could be though, I’m not a coolant scientist.
Personally for me I use the fill plug on ptu it is also a magnet plug, and if done right a flush a fill with a pump should take only 15min. Reason I don't like fill by vent tube, to to long to fill, and benefit to using fill plug is you can't screw up fill, any excess just pours out fill plug, and again fill plug is magnet, good to keep it clean as second line of defense. And added benefit of you can pull vent tube, use some pipe cleaner get in the vent and wipe out any sludge build up, so it vents like it should.
The fill plug on the Perf Package PTU is also a temp sensor. To access the PP fill plug, the temp sensor, heat shield and cat converter must be removed. On the PP version of the PTU it's just easier to use the vent tube. The drain plug at the bottom has the magnet.
I have a UPR CC and it did cost me $200 almost 4 years ago. I change my oil religiously every 3k miles, and I get roughly 2 to 3 ounces of crap/oil out of my CC every time. 40k miles of ownership / 3k mile oil changes = 13 oil changes x 2.5 ounces of crap in cc = 32.5 ounces of crap that could have been baked onto my valves.
I've got the new coolant. It honestly looks green
You are correct, I'm non-pp, I don't have all that in my way.
And for good maintenance if you pull vent tube from ptu, take a pipe cleaner and cleaned ptu vent to get any sludge out.
