More cooling problems

[Francois_]

So last night when I got home, I parked, car was fine, temps were fine. I shut the car off and about 30 seconds later I turned the key to the on position to roll up the window and noticed the temps were at the 3rd line and the fans kicked on. Once again, it was fine when I was driving home.

So this morning, I come outside to take a look at it. Popped the coolant res by the turbo and noticed it was a little low. So I topped it off and bled it a little bit. I start the car, it warms up fine, gets to operating temp and stays there. After about 5 minutes of it being at operating temp and not overheating, I shut it down. Then I put the key to the on position again and sure enough the temps started to rise and the fans kicked on.

The temperatures only start to increase once the car is shut off. Which makes sense seeing as how coolant flow has stopped and the engine is hot. But enough to raise the needle and turn the fans on?

Not really sure what is going on. The heat works, radiator hoses are warm, and nothing is leaking. Any ideas as to what to look at next?

Thanks for any input

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[Tdaz250]

How many miles?

[Francois_]

Built motor has a little less than 30k miles

[Mr.Chow]

Have you tried burping the upper turbo coolant reservoir? I was having a similar issue on my ej207 and that's all it was. Basically take off the top cap, start the car, watch for bubbles coming up through the coolant, grip the upper coolant hose and give it a few squeezes, watch for more bubbles. The upper rez should start to fill a bit, when it's fully pressurized add some coolant and top it off. Turn off the engine, replace the cap and you should be good. I had some air in my system due to a tiny coolant leak on my lower rad hose on the drivers side. Hope this helps.

[Francois_]

I did that yesterday. And all seemed fine til I shut it off.

Could it be coolant temp sensor related? Maybe the fans aren't coming on when they're supposed to?

[Francois_]

Originally Posted by Francois_

I did that yesterday. And all seemed fine til I shut it off.

Could it be coolant temp sensor related? Maybe the fans aren't coming on when they're supposed to?

Never mind, don't think it's that. I just took the car for a test drive around the block to see how it was acting since I haven't driven it since the problem happened two days ago.

I let it warm up most of the way. When I started to drive, it continued to warm up to just about full operating temp. I got back home and parked and shut it off. When I turned the key back on, the fans came on immediately and the temp rose a tiny bit.

So I drove it barely enough to get it to operating temp and it still got hot enough to turn the fans on when I turned it off. Seems really weird.

[rick-l]

I don't understand what the problem is.

[Francois_]

Originally Posted by rick-l

I don't understand what the problem is.

It's overheating upon shut off.

[michael everson]

Its not overheating. Its acting normally. All cars do this. Coolant stops flowing and then starts to heat up. No big deal.
Mike

[Francois_]

Originally Posted by michael everson

Its not overheating. Its acting normally. All cars do this. Coolant stops flowing and then starts to heat up. No big deal.
Mike

I've just never had the fans come on that early. I understand how it will heat up on shut off but it's never been this prominent.