engine temp. higher than before

[r46]

after replacing rediator(koyo, Indonesia)and cap, the engine temperature looks higher. Ididn't drain all the coolant, just the radiator part. I started the engine and drove afew miles, then added more. I squeez the upper hose trying to remove air as much as I can. Still higher. Any suggestion?
The coolant I added is Peak antifreeze 50/50, green color. Is it fine? I saw some of the threads about the coolant color.
Mine is 96 camry I4, 108K, thanks for any help

[toyomoho]

Is the radiator the right size for the engine? Did you leave anything inside the hoses and hook up the coolant fan wires? Does the temp gage read hotter under all speeds and conditions?

If the radiator and the rest of the system are OK, the thermostat should control coolant temp. The system will bleed itself. Mixing coolant should not raise the gage temperature. Toyota recommends coolant that does not contain silicates or borates. Why did you change the radiator, cracked?

[Eye8Pussies]

did you bleed the entire system? unless bled right, the thermostate may not open up fully and the coolant won't circulate through the rad

long story short, if when dealing with the cooling system and it wasn't flushed, and afterwards it doesn't work properly, do a full flush first before looking elsewhere for problems

[r46]

toyomoho: thanks for your reply
I saw there was rust trace at the bottom of the rad, between the lower tank and the core. and the rad cap is bad too, gasket cracked. So I replaced both.
How to check the fan wires and temp gage? Should I see the fan rotating after several miles running and idling at my home?

Eye8Pussies vbmenu_register("postmenu_1380459", true); : thanks too for your suggestion
I didn't flush the whole system just because I couldn't find the engine drain plug and it seemed fine before except the leaking. Now it will be not overheating on highway with A/C on. But if it can not pass the smog test I will do a complete flush. vbmenu_register("postmenu_1380436", true);

[toyomoho]

The coolant fan should come on when the coolant temp reaches about 199F. When using the A/C, one of coolant fans also turns on. Normally, the engines cooling system keeps the engine at a constant temp when driving at highway speeds without the A/C or coolant fan on. Removing the block water plug can be difficult; often people just leave it in and flush the engine as best they can. Not sure if a slightly higher coolant temp will cause the car to fail the smog test.

To formally test the coolant temp sensor, an ohmmeter and a chart of ohm reading versus temp is required. I don’t have the chart. You might pickup a thermometer that goes up to at least 212F. The engine coolant should normally run about 183Fish. You can let the engine warm up as you take the coolant temp, then see where the temp gage reads. This way you can also check the coolant fan operation.

[r46]

toyomoho:
thanks so much, great opinion
When I flush the rad, I just add water through where the rad cap is and leave the coolant drain plug and engin plug open. Am I right? I couldn't flush the engin part directly.
In my previous smog test, everything is fine except the NOx, which hit the limit. Does the higher coolant temp mean higher engin core temp? What I can do now is just add that G2P in my gas tank.
And I don't think I can check the temp sensor by myself even I have everything needed. (after a brief search) that sensor is not the one on the bottom of the rad, isn't it? vbmenu_register("postmenu_1381758", true);

[toyomoho]

Such things as EGR problems, O2 sensor, catalytic converter can cause high NOx.

The water temp sender for the cluster gage is located on the engine coolant exit manifold. The one attached is connected to the top radiator hose. The sensor on the radiator is for the coolant fan. Find some type of thermometer, even a meat thermometer. Start the car up; check the coolant temp at the radiator cap location. See what it reads at the old indicator gage position (before the radiator change) and at the current gage position. Also see if the coolant fan comes on at about 199F.

Usually flushing the engine involves removing the thermostat and running water thought the engine. Also running water through the radiator top hose and out the bottom.