Ask Bob: Overheating
by Bob DeP.
My friend's car has recently started overheating while driving. A repair shop thought that it was the thermostat, so they replaced it and refilled the radiator fluid. Two weeks later, while driving, the engine temperature gauge shot up. When they pulled over, they noticed that the radiator fluid level was extremely low. Do you have any idea as to what may be the culprit?
Does the car have any leaks? There may be a small high-pressure leak that would not leave a puddle under the car. Nevertheless, you can still smell it. Antifreeze has a distinct sweet smell to it. To notice this "high-pressure" leak, drive the car around for a while, until the engine is up to operating temperature. Then park the car somewhere safe and open the hood. Look around at all the hoses, but be careful, the engine is hot.
You may see a small thin stream flowing from a hose, usually around the area of a clamp that has been overtightened. Another possibility is a bad radiator cap, or a small pinhole in the radiator causing the loss of coolant. The worst possible case is a bad head gasket. This can be determined by looking at the engine oil dipstick. If is comes out another or color than normal engine oil, i.e.. white, gray, creamy, mayonnaise like, then the coolant is entering the oil and you have a bad head gasket. Or you can go to the rear of the car and see if there is an antifreeze smell in the exhaust. The coolant is entering the cylinder and is being burned with the fuel. You may also see bubbling in the radiator. Another possibility is a bad water pump.
Bob, The Auto Answer Man
Have a car care question? Visit our automotive center and see if we've already answered it or a similar question.
More Tips & Tools to Help You
Live Better...For Less
- 6 cheap, effective home security solutions
- 5 frugal ways to expand your living space
- Top 10 DIY mistakes made by home 'handymen'
- How to hire an affordable, reliable housesitter
- Helping your adult children with housing
- 10 ways to cut the cost of cleaning
- Installing bathroom in-floor heat
- Natural homemade laundry soap recipes
- How to reduce heating bills this winter
- Find the best mortgage rates in your area
- 3 ways to use a mortgage calculator
- Mortgage calculator: Calculate your payment and more
- Home equity calculator: HELOC vs. line of credit
- Should I borrow from my home equity?
- How much can additional payments save me on my mortgage?
- Who offers the most home insurance discounts?