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My Volvo 240 DL is overheating. The temperature gage climbs to the red zone, and will stay there briefly (although briefly is getting longer), and then goes back to normal position. Once it returns to the normal position, the car is fine.

I suspect the engine is not really overheating since it goes back to normal, and stays there for the remainder of my commute.

Any ideas on what this might be and how to fix it myself? I am not a mechanic.

Normally the car would go directly to my mechanics. But I am trying to get through this year without additional mechanics cost before I give the car to a salvage yard.

thanks
 

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I think you are correct the car isnt overheating.There is 2 things on the back of the speedometer that goes bad and does this.They are called a voltage satbilizer and temp compisation board.But if you are going to be junking the car soon i would go to the local auto parts store and buy a cheap guage and install.The guage will cost about $20.00.
 

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QUOTE(jdbs3 @ Nov 9 2004, 10:42 AM)My Volvo 240 DL is overheating. The temperature gage climbs to the red zone, and will stay there briefly (although briefly is getting longer), and then goes back to normal position. Once it returns to the normal position, the car is fine.

I suspect the engine is not really overheating since it goes back to normal, and stays there for the remainder of my commute.

Any ideas on what this might be and how to fix it myself? I am not a mechanic.

Normally the car would go directly to my mechanics. But I am trying to get through this year without additional mechanics cost before I give the car to a salvage yard.

thanks
[snapback]1077[/snapback]​


hello,

easy to fix without buying new parts. the 4 tiny pins where the temperature compensation board (2 in x 1 in) is connected to is nside the instrument cluster.

these little posts need some abrasive cleaning--with an erasure or a tiny knife to scrape the posts. don't bend them.

if you need more info, please contact me at [email protected]

regards,
byron golden
86 245
92 245
 

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QUOTE(bcg @ Feb 25 2005, 11:53 PM)hello,

easy to fix without buying new parts. the 4 tiny pins where the temperature compensation board (2 in x 1 in) is connected to is nside the instrument cluster.

these little posts need some abrasive cleaning--with an erasure or a tiny knife to scrape the posts. don't bend them.

if you need more info, please contact me at [email protected]

regards,
byron golden
86 245
92 245
[snapback]4041[/snapback]​


Cleaning the posts does absolutely no good if the compensation board is failing, which is a common problem. I've done this repair several times, and know what I'm talking about.

Actually, the most effective repair for a failed compensation board is to eliminate it altogether. US-market cars were the only 240s to have the compensation feature. Apparently, US 240 drivers became alarmed if their temperature gauges moved at all during normal driving, so the board was added to the 86-93 cars to keep the gauge at 9 o'clock during normal operation. A small wire jumper, either between 2 of the pins or 2 holes in the board, is all that's necessary. If you can operate a soldering iron, it's a 5 minute job once you pull the cluster.
 
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