how long to wait for turning off the engine

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how long to wait for turning off the engine

Postby benTSH » Mon Sep 07, 2015 6:26 am

Hi,

Here is a picture which show the temp when I'm parking and I'm wondering if I can turn off the engine ( a 3.0R with 255000 km ) without waiting or would it be better to wait a little the indicator go lower or when the fan stop for example ?

Thanks by advance

http://image.noelshack.com/fichiers/2015/36/1441554275-20150906-120833.jpg
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Re: how long to wait for turning off the engine

Postby andy_mac » Mon Sep 07, 2015 9:04 am

Shouldn't be that high ever unless you're putting it under some serious sustained load let alone when you're driving into your driveway.
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Re: how long to wait for turning off the engine

Postby HardwareBoB » Mon Sep 07, 2015 9:19 am

Yeah I'd be looking at your cooling system - thermostat/radiator, possible leaks.
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Re: how long to wait for turning off the engine

Postby BillyCorgi » Mon Sep 07, 2015 2:01 pm

Get a Subaru Select Monitor or an OBD2 scan meter connected and check the coolant temperature reported from the ECU.
Determine whether you have a Temperature Gauge calibration issue or whether you definitely do have a high coolant temperature issue.
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Re: how long to wait for turning off the engine

Postby benTSH » Tue Sep 08, 2015 4:59 am

This temp is only when I'm parking without moving.

When I drive the temps indicator is horizontaly or a little cold even at high speed :mrgreen: .


But agree with you I'm going to get an OBD scanner; there are so much product to connect via WIFI or Bluetooth and so much softwares than I don't know which one to buy :mrgreen:

For you from which temp in °C begin to be suspect for health of the engine ?

The OBD scan give us oil temp and pressure too ? and which are the good values ?


Thanks again for helping me
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Re: how long to wait for turning off the engine

Postby BillyCorgi » Tue Sep 08, 2015 7:10 am

check your fans are working correctly.
The 3.o litres have two speed fans.
Are you getting to high speed?
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Re: how long to wait for turning off the engine

Postby benTSH » Wed Sep 09, 2015 4:43 am

They seems to work correctly

high speed not always and only engine warm :wink:
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Re: how long to wait for turning off the engine

Postby michaelat » Thu Sep 10, 2015 11:16 pm

If your engine is colder at high speeds, that indicates the possibility of a thermostat in need of replacement. I'm not sure what sort of thermostat those cars run, but my last car (an old pulsar) had a faulty thermostat which had ceased open, which stopped the engine from getting up to heat. That said, however, the engine never got that hot. Check your fans and coolant. If the problem persists, you may need a new thermostat.

Also, you should scan that Check Engine Light. That may also give some sort of indication towards what the cooling issue is.
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Re: how long to wait for turning off the engine

Postby Surge » Thu Sep 10, 2015 11:24 pm

I agree that it seems a bit excessive to get that hot. If you end up scanning with an obd tool, seeing over 110-115C would worry me.

Sadly obd tools are unlikely to get you oil pressure or temp. I know on the ej25 they don't. Not sure about the h6.

Sure you're not leaking coolant somewhere? Heater hoses?

Also with that many km on the engine, I'd suspect a head gasket could be due to fail if not already changed.
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Re: how long to wait for turning off the engine

Postby HardwareBoB » Fri Sep 11, 2015 11:29 am

Surge wrote:Sadly obd tools are unlikely to get you oil pressure or temp. I know on the ej25 they don't. Not sure about the h6.

There are no sensors, the ECU doesn't know what they are so it can't possibly export them. This is why I'm adding an oil pressure/temp sensory in my car.
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Re: how long to wait for turning off the engine

Postby BillyCorgi » Fri Sep 11, 2015 11:33 pm

My OBD tool and FreeSSM software report coolant temperature on MY09 2.5i Liberty, MY05 H6 and MY12 Forester
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Re: how long to wait for turning off the engine

Postby Surge » Sat Sep 12, 2015 7:38 am

Yeah you get coolant temp for sure.

I reached 120 C with a bad head gasket before :lol:
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