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SprintStar
Joined: 26 Aug 2003
Posts: 150
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 Posted: Thu Sep 11, 2003 10:47 am Post subject: There is DEFINITELY a problem! (Water Temp High) |
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Ok, a few days ago, I posted asking what the water temp gauge should read. Most told me nothing to worry about as it seems normal, though I felt otherwise.
Last night, the temp shot up and stayed IN the red zone. My water and oil level is fine. What next? Water thermostat? I dare not drive the car now...
Dudes, I'm an air-cooled guy and this is really getting me worried!
SprintStar. |
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Paul
Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
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| Posted: Thu Sep 11, 2003 11:00 am Post subject: |
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Are your radiator fans kicking on at about 3/4 of the way to red?
I asked you about this before.... |
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SprintStar
Joined: 26 Aug 2003
Posts: 150
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| Posted: Thu Sep 11, 2003 11:09 am Post subject: |
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| Paul wrote: | Are your radiator fans kicking on at about 3/4 of the way to red?
I asked you about this before.... |
Yes Sir, the fans are on. Both of them.
Sprint. |
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Paul
Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
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| Posted: Thu Sep 11, 2003 11:13 am Post subject: |
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| Is it going into the red while you're stopped or while you're cruising? |
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SprintStar
Joined: 26 Aug 2003
Posts: 150
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| Posted: Thu Sep 11, 2003 11:16 am Post subject: |
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| Paul wrote: | | Is it going into the red while you're stopped or while you're cruising? |
Ok, it used to creep up a bit. From slightly left of 2nd line to slight right of it. Recently it's steady at 3rd line when cruising and when stopped, it's INTO the red.
That's why I posted in the first place, thinking something is not right.
Sprint. |
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Paul
Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
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| Posted: Thu Sep 11, 2003 11:20 am Post subject: |
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It may just be the temperature sensor, do you have any other signs of overheating?
Has the outdoor temperature increased significantly since your gauge went up another notch? |
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SprintStar
Joined: 26 Aug 2003
Posts: 150
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| Posted: Thu Sep 11, 2003 11:25 am Post subject: |
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| Paul wrote: | It may just be the temperature sensor, do you have any other signs of overheating?
Has the outdoor temperature increased significantly since your gauge went up another notch? |
Err... I'm going to ask a dumb question? What other signs of overheating is there?
The oil pressure seems fine. It increases as you rev. The oil pressure light doesn't come on at idle. I've got enough water but oil level drops and I top it up. I assume the turbo does eat some oil, right?
How do I confirm it's the temperature sensor? The weather in Singapore is sunny all year around. The car makes good power.
I'm worried it's a stuck thermostat. I'm tempted to remove it and run for a day without it, just to see if the temps fall. It raises real quick to 3rd line and once I hit a stop light. I'm in the red.
And yea.. I noticed also that when the headlights are on, the temp seems higher. But I think that's due to resistance in old wires, right?
Sprint. |
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Paul
Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
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| Posted: Thu Sep 11, 2003 11:32 am Post subject: |
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Signs of overheating include water spewing out of the coolant tank, bubbling sounds from the motor after shutdown, etc.
Running without a thermostat will make things worse.
Themostats usually fail open.
If you haven't changed your coolant in the last 2 years, I suggest you flush and refill the system (be sure to bleed it) and replace the thermostat. |
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SprintStar
Joined: 26 Aug 2003
Posts: 150
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| Posted: Thu Sep 11, 2003 11:37 am Post subject: |
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| Paul wrote: | Signs of overheating include water spewing out of the coolant tank, bubbling sounds from the motor after shutdown, etc.
Running without a thermostat will make things worse.
Themostats usually fail open.
If you haven't changed your coolant in the last 2 years, I suggest you flush and refill the system (be sure to bleed it) and replace the thermostat. |
I'll check for steam later today.
Why will running without a thermostat be worse? Without it, the water will definitely go to the radiator, right? I want to see the temps go down, then conclude it's the thermostat at fault...
I'll try do a flush soon. I just have to follow the instructions in the Haynes manual, right? Any special coolant to use?
Sprint. |
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Paul
Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
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| Posted: Thu Sep 11, 2003 11:43 am Post subject: |
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In a 924, the thermostat controls flow from both the top and the bottom, removing it screws up the coolant flow.
Yes the Haynes procedure will work, use a phosphate free antifreeze to refill. |
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SprintStar
Joined: 26 Aug 2003
Posts: 150
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| Posted: Thu Sep 11, 2003 11:49 am Post subject: |
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| Paul wrote: | In a 924, the thermostat controls flow from both the top and the bottom, removing it screws up the coolant flow.
Yes the Haynes procedure will work, use a phosphate free antifreeze to refill. |
Ok, will try do the flush and give a field report soon. And err... regular coolant is phosohate free or is it a special type?
And where is the temp sensor located anyway. Is it the little pin head at the back of the cylinder head close to the firewall?
Sprint. |
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Paul
Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
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| Posted: Thu Sep 11, 2003 11:53 am Post subject: |
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| Yes the temp sensor has a single wire going to it and its on the back of the head. |
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SprintStar
Joined: 26 Aug 2003
Posts: 150
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| Posted: Thu Sep 11, 2003 11:58 am Post subject: |
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| Paul wrote: | | Yes the temp sensor has a single wire going to it and its on the back of the head. |
Same item on the 924 as the 931?
Sprint. |
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Paul
Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
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| Posted: Thu Sep 11, 2003 12:00 pm Post subject: |
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| IIRC yes. |
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SprintStar
Joined: 26 Aug 2003
Posts: 150
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| Posted: Thu Sep 11, 2003 12:04 pm Post subject: |
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Thank you, Sir! 
Will do a flush and post report soon.
Sprint. |
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