2L high EGT

[4Ruster]

I have a 1986 4runner that I swapped a 2L1 non turbo diesel into. Runs fine (blue smoke on cold start), but I get very high EGTs when climbing relatively small hills and just trying to maintain 80+ km/h. It has a brand new 3 core radiator for a v6 4runner, and a 180 thermostat. I've mounted the pyro right on the exhaust manifold.
On idle it will sit at 250F
Normal city cruising (about 50-60 km/h) 400-600F
But on relatively small hills I'll downshift to 3rd to hold 50 km/h up the hill, not struggling at all, but the EGTs will creep up to 1100F, then the water temp will creep up to 195~F. Same thing when trying to go faster then 80 km/h on the highway.
The engine doesn't feel strained at all, and if I let my foot off the EGTs will go back to 600~F

The injector pump timing notch is eeeeeever so slightly above the notch on the timing cover, and the fuel screw as far as I am aware of, is 1/8th of a turn above stock. It never blows any smoke once its warmed for a few seconds after starting, you can just barely see a wisp of black smoke if you rev it, but you have to be standing right by the tailpipe to see it.

I need to decrease my EGTs when going up hills because I plan on taking it camping and offroading, and the hills to get out of the valleys are steep.

 

[GTSSportCoupe]

You could check your timing with a dial gauge per the FSM instructions and see if that has any impact.

Most likely you'll have to pull the fuel back a bit. If it's running a bit high EGT's already, it'll be way worse in summer heat under higher loads. And/or you can add more air by improving intake/exhaust. Nice free flow exhaust and a header if you can find one, and a high flow intake.

 

[4Ruster]

You could check your timing with a dial gauge per the FSM instructions and see if that has any impact.

Most likely you'll have to pull the fuel back a bit. If it's running a bit high EGT's already, it'll be way worse in summer heat under higher loads. And/or you can add more air by improving intake/exhaust. Nice free flow exhaust and a header if you can find one, and a high flow intake.

I'll have to do that. My coworkers are saying 1100 isnt hot at all, but I'm honestly not sure. If I were to keep it at 1100 going up a hill, how long can I hold it there? I'm not straining the motor at all, I'm just humming along at 50 km/h. The coolant temperature never goes above 200 so I'm somewhat comfortable.

My air filter is pretty old too, I should probably replace that.

But ah, what is normal EGTs for climbing a hill?

 

[GTSSportCoupe]

1100 if it was your max would be fine. But I guarantee you'll be much higher under worst case conditions. My 2LTE was the same as your motor when it was stock. Now with a leaner tune I run around 700-800F max (pre turbo) daily driving. When I tow on a hot summer day, I will touch 1000-1100F max (9000lb truck&trailer up 8% grade on 30C day).

You can control it with your right foot to some degree. Maybe just watch it as you drive it more, and decide what to do based on that.

 

[4Ruster]

1100 if it was your max would be fine. But I guarantee you'll be much higher under worst case conditions. My 2LTE was the same as your motor when it was stock. Now with a leaner tune I run around 700-800F max (pre turbo) daily driving. When I tow on a hot summer day, I will touch 1000-1100F max (9000lb truck&trailer up 8% grade on 30C day).

You can control it with your right foot to some degree. Maybe just watch it as you drive it more, and decide what to do based on that.

Ahh I see. So turning down the fuel should reduce my EGT. Think I can just trail and error it? Turn it down a bit, check the temps, turn it down a bit more, check temps again, if I lose power turn it back up slightly?

 

[GTSSportCoupe]

Ahh I see. So turning down the fuel should reduce my EGT. Think I can just trail and error it? Turn it down a bit, check the temps, turn it down a bit more, check temps again, if I lose power turn it back up slightly?

Absolutely! Just make sure you take some pictures (or mark it somehow) of how it's setup now before you make changes. Then worst case you can set it back to stock. Also, make very small changes at a time only.

 

[KiwiDingo]

Naturally aspirated diesels will always run hotter EGT than a turbo diesel and is completely safe. 1100 degrees F is actually quite cold for a N/A diesel.

 

[AirheadNut]

I was going to say the same as @KiwiDingo, 1100°F doesn’t seem very hot for NA. Really it isn’t very hot for a turbo diesel either, the old rule of thumb was always to keep under 1250°F and modern diesels run much hotter than that.

 

[GTSSportCoupe]

In a nut shell, leave it as is for now, but keep a close eye on it come summer and heavier loads. You may have to pull fuel if you are getting 200F higher than you are now; which is definitely a possibility.