Normal temperature for 1fz-fe? (3 Viewers)

[zx350]

Hello I recently bought a 2009 71 series with 1fz-fe engine, in the summer when I stop and keep the engine running the temp gauge almost reaches the middle is that in the normal range,
and if it isn't in the normal range will replacing the original thermostat with a 1hz thermostat solve the problem,
And has anyone installed an aftermarket temp gauge and checked the actual temp versus the temp gauge.

 

[coldtaco]

you might check if there are different temp thermostat for your engine, instead of trying one from another engine unless you can verify that it will fit.
yes you can install a aftermarket water temp gauge, usually you can buy a adapter and install it in the top radiator hose. my experience with the 2H/12HT is that with the needle at the middle my temp is around 190-200F. anything above would be too warm. you need to learn where the needle sits and then when it shows something different then need to figure out what's going on.

 

[OGBeno]

you might check if there are different temp thermostat for your engine, instead of trying one from another engine unless you can verify that it will fit.
yes you can install a aftermarket water temp gauge, usually you can buy a adapter and install it in the top radiator hose. my experience with the 2H/12HT is that with the needle at the middle my temp is around 190-200F. anything above would be too warm. you need to learn where the needle sits and then when it shows something different then need to figure out what's going on.

Totally different with a gasser 1FZ.

 

[zx350]

also I live in a very hot climate and the needle only reaches the middle of the gauge in the summer and only in the day or when I go to the desert and rev it really hard while climbing some sand dunes, at night it stays at quarter of the gauge, and I am sure that the 1hz thermostat bolts on without any modification.

 

[JuanJ]

Hello,

The middle or below the middle is normal for a 1FZ engine.

Normal engine temperature is 83 C or 182 F. Under sustained load, or on a very hot day, it can reach 86 C or 187 F.

The numbers above correspond to middle or below the middle in the OEM temperature gauge.

You can replace the thermostat for peace of mind.

Engine oil with a little more viscosity is good for the engine you have. It does wonders to complement the cooling system and the thermostat. A good choice is Toyota OEM engine oil.

You can install an aftermarket temperature monitor. There are several options from Australian suppliers. One of them is Engine Watchdog.

Hope this helps.





Juan