Name: [046] David Rawlinson
Member: 114 months
Authored: 5 videos

Coolant inspection [ID:053] (2/5)

in series: Basic Car Maintenance

video tutorial by David Rawlinson, added 03/07

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Briefly, coolant should not be rusty-coloured. Nor should it be oily. There should be no bubbles coming up to the radiator cap (this indicates pressurisation via broken head gasket).

You can usually check the coolant at the radiator cap or expansion tank: Beware, if the engine is warm a blast of steam may escape causing burns! Place a towel over the cap before unscrewing.

Coolant should never leak. Signs of leakage include stains (especially white deposits) near hose joints etc.

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  • Published: Sometime before 1st March 2007 (in other words - we don't remember!)

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3. anonymous Tue, 05 May 2009 19:56

very good

2. anonymous Mon, 30 Mar 2009 11:16

The coolant video was very helpful. I never knew where these were.

"If you open it with the engine running..."

David already warned about removing the cap while the engine is warm (let alone hot). I just want to reiterate that if you want to do the "engine running" test... make sure the engine is cold or has been sitting for at least an hour (warm).

Also, don't forget that as the engine is running and the cap is off, you have a set amount of time before the coolant's temperature raises to the point where it is going to want to overflow out of the reservoir :) It could happen as quickly as 3 minutes. Just don't dawdle, that's all.

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