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Suppliers/Dealers or anyone selling with a commercial view in mind CANNOT post here unless responding to a specific request of a member in a "wanted" post.
Suppliers include people "breaking for spares" on a regular basis, when purchasing spares members should ask a supplier what they contribute to the running of the forum particularly if contacted by a Private Message
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Engine Heating up
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25 Nov 2022 15:26 #246118
by DrRobin
2020 blue SZ5 (one of the last to be registered in the UK)
Ex 2011 Blue Jimny SZ4
Northumberland Jimny Blog
Replied by DrRobin on topic Engine Heating up
Just as a matter of interest where are you based and what is the ambient temperature?
I too suspect the fan, if it is okay when moving then it is the job of the fan to keep air flow across the radiator when stopped. However, you mentioned temperature creeping up whilst moving, so unless it is very hot where you live, I am starting to suspect a leak in the coolant system. you also mentioned putting the heater on stabilised it, so does sound like the radiator is not doing a good job.
Are there any signs of coolant loss, or is the expansion tank filling up?
Alternatively, is the space front and rear of the radiator clear? There isn't anything fixed to the front which is stopping air flow?
I too suspect the fan, if it is okay when moving then it is the job of the fan to keep air flow across the radiator when stopped. However, you mentioned temperature creeping up whilst moving, so unless it is very hot where you live, I am starting to suspect a leak in the coolant system. you also mentioned putting the heater on stabilised it, so does sound like the radiator is not doing a good job.
Are there any signs of coolant loss, or is the expansion tank filling up?
Alternatively, is the space front and rear of the radiator clear? There isn't anything fixed to the front which is stopping air flow?
2020 blue SZ5 (one of the last to be registered in the UK)
Ex 2011 Blue Jimny SZ4
Northumberland Jimny Blog
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25 Nov 2022 15:33 - 25 Nov 2022 15:36 #246119
by Scimike
Yokohama Geolanders, Sony head unit, NAUTILUS Air Horn, DRL conversion, Rear cargo space, Elvis Bobblehead, transfer Guard, Indian hanging Elephant, Koni Heavy track dampers, Custom SS exhaust, Voodoo Doll, Adventure Rack with LED ight bar, vintage ERIBA caravan usually attached (yes it's slow)
Replied by Scimike on topic Engine Heating up
Here you go, the explanation of "how it works".
In simple terms the hot air from the radiator expands the bimetallic strip, this opens the valve and the fluid locks the fan to the drive plates (as it spins). Once cold the bimetallic strip closes the valve and the fluid stops locking the drive plates (as it spins), and the fan stops turning.
This is that you see from a cold start. The fluid is still in the drive plates from the day before but the bimetallic strip has closed as the valve is now cold. You start the engine and it takes a few rotations for the fluid to return to the reservoir, unlocking the plates and slowing the fan. The AC fan is just showing this as airflow.
In simple terms the hot air from the radiator expands the bimetallic strip, this opens the valve and the fluid locks the fan to the drive plates (as it spins). Once cold the bimetallic strip closes the valve and the fluid stops locking the drive plates (as it spins), and the fan stops turning.
This is that you see from a cold start. The fluid is still in the drive plates from the day before but the bimetallic strip has closed as the valve is now cold. You start the engine and it takes a few rotations for the fluid to return to the reservoir, unlocking the plates and slowing the fan. The AC fan is just showing this as airflow.
Yokohama Geolanders, Sony head unit, NAUTILUS Air Horn, DRL conversion, Rear cargo space, Elvis Bobblehead, transfer Guard, Indian hanging Elephant, Koni Heavy track dampers, Custom SS exhaust, Voodoo Doll, Adventure Rack with LED ight bar, vintage ERIBA caravan usually attached (yes it's slow)
Last edit: 25 Nov 2022 15:36 by Scimike.
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26 Nov 2022 00:35 #246127
by Jamesl
Replied by Jamesl on topic Engine Heating up
I live in Queensland Australia so can get pretty warm. It first started around Rockhampton in the middle of the day (so around 40*C) on a road trip. But it was also happening in winter down south near the snow.
The coolant was leaking before the engine replaced. It might still be leaking but haven’t investigated. Somehow recently some mud got into the system too which had to be cleaned out (yes doesn’t help the situation). The expansion tank doesn’t seem to be overflowing though.
There is the AC fan fixed to the front of the radiator. But that’s it.
The coolant was leaking before the engine replaced. It might still be leaking but haven’t investigated. Somehow recently some mud got into the system too which had to be cleaned out (yes doesn’t help the situation). The expansion tank doesn’t seem to be overflowing though.
There is the AC fan fixed to the front of the radiator. But that’s it.
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26 Nov 2022 00:40 #246128
by Jamesl
Replied by Jamesl on topic Engine Heating up
It does give somewhat of a fight but I wouldn’t have thought I’d be able to stop it. I might open it up and check it out.
Just not sure which silicone oil is the best one and is available in Australia that I can pick up. Any recommendations?
Just not sure which silicone oil is the best one and is available in Australia that I can pick up. Any recommendations?
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26 Nov 2022 04:41 #246129
by Lambert
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
Bellerophon (2024 grello van daily
ADOS Attention Deficit Ooooh Shiny!
Replied by Lambert on topic Engine Heating up
I used 6000 grade, got it from my local RC car shop, was less than a tenner for 500ml.
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
Bellerophon (2024 grello van daily
ADOS Attention Deficit Ooooh Shiny!
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