I'm having a tough time identifying this coolant hose. The internet is full of all kinds of the wrong pictures today.
1985 2WD pickup 22R w/ Carburetor
Hose snakes over the top of the oil filter. Starts at the pipe circled in green in the photo (behind that hard line: can't see it). Blue line is direction of travel. Bends up to connect to manifold below the carburetor. I don't even know what that thing is that it starts from (red #1 in photo). Timing chain cover?
Bypass hose? Any guesses? Trying to find a part number.

Also: is there a place that has all the schematics for these systems? I can't seem to find them. Best I've come up with is the Toyota parts website, but I can't find this hose on their page...
Thanks y'all!

 

seems like you could find a similar material line at NAPA, Autozone etc. Not gonna be easy to find the part for an almost 40 year old truck

 

That is a coolant hose that Toyota calls "HOSE, WATER BY-PASS".

It is a coolant hose that allows coolant to circulate through the engine before the thermostat opens up, bypassing the radiator.

The bypass hose is reference number 16261 in the diagram below:



[Diagram from parts.toyota.com]

It appears that the molded hose is still available from Toyota. I see two part numbers listed for a 1985 Truck with 22R. I believe the top one is what you need, but I am not 100% sure. You can call or visit your local dealer with your VIN to confirm.

Part number: 16261-35061 (MSRP $16.56)
and
Part number: 16261-35040 (MSRP $16.16)

You can find it cheaper online, but shipping might make it more expensive than your local dealer in the end unless you are buying multiple parts.

 

thank you!
That schematic is a bit abstract to me, but that’s the hose! I’ve already tried Autozone, no luck. I’m going to have to wait until Monday to go to Toyota parts department.