1976 FJ40 Hose Routing Cleanup

[Fzjrvakma]

I've been studying this for the past several weeks and I'm hoping you guys can get me clear on the OEM hose routing on my 1976 (which we've discovered has a 1977 2F). I'm finally to a point where I can start cleaning up the engine bay and attempt to restore to OEM. Some reference photos (ignore the fuel line/fuel filter nonsense):

After scrubbing photos and Toyota diagrams, I'm still confused specifically about:

1. How does the oil cooler inlet/outlet hosing run and where do they terminate?
2. What ties in to the lower radiator union? The heater outlet at the firewall?
3. Should there be a tee where the by-pass hose (between the water pump and the thermostat housing) connects to the thermostat housing? What hose should be connected on that tee?
4. What hose/route feeds the heater inlet at the firewall?
5. Can someone explain the hose that terminates on the top of the block, driver-side, near the firewall, that runs under the brake master cylinder? What's the function?

 

[Fzjrvakma]

Bump

 

[Grayscale]

Mine is a '75. So I have no oil cooler. The thermostat is connected to the water pump without a tee.

 

[subzali]

This might help with some of your questions?

Replacement Heater Hoses

Are folks just using 5/8" heater hose to replace the small diameter hoses? Also, Is the pigtail for the rear heater supposed to wrap around the fan stator and have the plug poking out the bottom? Like in the picture below

forum.ih8mud.com

 

[Fzjrvakma]

Any idea what year the oil cooler was added?

 

[Grayscale]

Any idea what year the oil cooler was added?

'76-model year

FJ40, FJ55, FJ60, FJ80, FZJ80, UZJ100 Land Cruiser Oil Cooler - Specter Off-Road

Toyota Land Cruiser parts since 1983. From the oldest FJ25 and to the newest Land Cruiser, Non USA or domestic 40 Series, 60 Series 80 Series or 100 Series, SOR has the largest selection of top quality new and used OEM and aftermarket Land Cruiser parts in stock in the world. Specializing in...

www.sor.com

 

[subzali]

'76-model year

FJ40, FJ55, FJ60, FJ80, FZJ80, UZJ100 Land Cruiser Oil Cooler - Specter Off-Road

Toyota Land Cruiser parts since 1983. From the oldest FJ25 and to the newest Land Cruiser, Non USA or domestic 40 Series, 60 Series 80 Series or 100 Series, SOR has the largest selection of top quality new and used OEM and aftermarket Land Cruiser parts in stock in the world. Specializing in...

www.sor.com

I think that may have been for CA models. My ‘77 Federal doesn’t have an oil cooler. I think starting in ‘78 or ‘79 they all got them.

 

[wimberosa]

I see you don't have any smog hoses on your rig but I'm contemplating heat forming some of these
hoses that are NLA (bending tube + heat gun). If anyone is interested in that project and has useless
smog hoses for examples....we should start a discussion (pm me).

Your existing hose lengths and routing is perhaps being exacerbated by them being cut long so they don't
have to conform to tight bends....

 

[Fzjrvakma]

Awesome, thank you guys. Now I just need someone to describe the oil cooler hose layout

 

[Grayscale]

I should have mentioned, a lot of engines simply have a filter on the valve cover. However, it is my understanding that sometimes the PCV system works backwards, like when you are pulling quite a bit of air thru the intake at the air cleaner assembly, at wide-open-throttle, and the engine is experiencing significant blow-by. My Weber, on a minitruck, has a fitting on the bottom of the plate that holds on to the air filter, is there a hole under the air cleaner bottom plate?

The SOR drawing suggest that the upper, oil cooler pipe was fitted to the top of the valve cover, I think. I can't tell what is going on behind your lower radiator hose.

 

[Pighead]

Awesome, thank you guys. Now I just need someone to describe the oil cooler hose layout

It looks like you have one hose from the oil cooler in place. There is an "extra" port on your water pump just for the oil cooler. It's really hard to see with everything else in place. That's where your other hose from the cooler attaches.
I put a '76 block into my '74 55, and in a half-hearted attempt to keep that area cleaner, decided to do without the oil cooler. Replaced it with the filter mount that had the threaded port for the oil pressure sender, found that the extra port in the water pump was a great place to install a water temp sender for an Autometer gauge.