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Strange coolant issue

Strange coolant issue

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is200turbo
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15-09-2021, 04:08 AM
#1
I've just fitted a new thermostat on my is200 and all bled up fine , up to temp and fans came on.

When I'm out drivin the temp gauge drops down to quarter warm but when I park up it goes back to normal, but only half the rad is warm now, I've re-bled the system and still no trapped air.

I'm totally stumped now.


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is200turbo
15-09-2021, 04:08 AM #1

I've just fitted a new thermostat on my is200 and all bled up fine , up to temp and fans came on.

When I'm out drivin the temp gauge drops down to quarter warm but when I park up it goes back to normal, but only half the rad is warm now, I've re-bled the system and still no trapped air.

I'm totally stumped now.


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Lexuspat
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6,827
15-09-2021, 05:50 AM
#2
hmm that sounds odd for sure. ill have a think but stav or someone like that maybe be able to help
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Lexuspat
15-09-2021, 05:50 AM #2

hmm that sounds odd for sure. ill have a think but stav or someone like that maybe be able to help

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Sparkystav
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14,683
15-09-2021, 12:20 PM
#3
Sounds like thermostat stuck open to me
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Sparkystav
15-09-2021, 12:20 PM #3

Sounds like thermostat stuck open to me

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is200turbo
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15-09-2021, 01:26 PM
#4
It's brand new as that was the issue before I changed it, it's not as bad but still an issue could it be the rad or rad cap?


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is200turbo
15-09-2021, 01:26 PM #4

It's brand new as that was the issue before I changed it, it's not as bad but still an issue could it be the rad or rad cap?


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is200turbo
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09-10-2021, 09:26 AM
#5
Will I've changed the rad cap and it still the same, there has got to be a leak some where as I've had to top up the coolant so hope the replacement rad fixes the issue


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is200turbo
09-10-2021, 09:26 AM #5

Will I've changed the rad cap and it still the same, there has got to be a leak some where as I've had to top up the coolant so hope the replacement rad fixes the issue


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Sparkystav
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09-10-2021, 09:33 AM
#6
Have you looked at the thermostat?
Cheaper than buying a rad
Edited 20-11-2014, 07:07 PM by Sparkystav.
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Sparkystav
09-10-2021, 09:33 AM #6

Have you looked at the thermostat?
Cheaper than buying a rad

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is200turbo
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09-10-2021, 09:36 AM
#7
I've changed the stat it was the first thing I did mate, the rad is stained red from the coolant and the under tray looks wet all the time under the rad so I'm guessing it has a leak plus it gives me an excuse to put a alu rad on Smile


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is200turbo
09-10-2021, 09:36 AM #7

I've changed the stat it was the first thing I did mate, the rad is stained red from the coolant and the under tray looks wet all the time under the rad so I'm guessing it has a leak plus it gives me an excuse to put a alu rad on Smile


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lex2oos
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138
09-10-2021, 11:19 AM
#8
check the overflow tank for cracks too, because thats where i was loosing coolant in mine.
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lex2oos
09-10-2021, 11:19 AM #8

check the overflow tank for cracks too, because thats where i was loosing coolant in mine.

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is200turbo
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09-10-2021, 11:34 AM
#9
I've checked it and it is water tight


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is200turbo
09-10-2021, 11:34 AM #9

I've checked it and it is water tight


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Morango
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14-10-2021, 06:39 AM
#10
it sounds like thermostat but if the problem is the same after a change maybe the coolant is bypassing the thermostat some how? gasket or crack? leaking coolant shouldn't produce the 1/4 temperature reading when moving.
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Morango
14-10-2021, 06:39 AM #10

it sounds like thermostat but if the problem is the same after a change maybe the coolant is bypassing the thermostat some how? gasket or crack? leaking coolant shouldn't produce the 1/4 temperature reading when moving.

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