Q: Engine steam and antifreeze leak - 1976 Mercedes Benz 450SL

asked by on

My car sat for several years without being used. When I took it out of the garage, I had the oil, coolant and gas checked. It all looked fine as well as the spark plugs. After I connected the battery, I started the car without any problems. For several days, I would start the engine and let it run for a short while. The last time I did that, it ran longer because I forgot to turn it off. When I went to the car, the engine was steaming. There was a significant amount of antifreeze under it. I let it cool down and refilled the antifreeze. I didn't attempt to start the car since then. Several days later, there was antifreeze leaked under the car again. What damage has this caused and what should I do?

Hello. This sounds like the water pump, radiator, radiator hoses, or even one of the heater hoses, have started to leak. It is also possible that the gasket to the thermostat could have a leak as well. It doesn’t sound like there has been a lot of damage to the engine. It sounds like it just overheated and needs a leak repaired. Have a certified technician, like one from YourMechanic, complete an inspection for leaks to pinpoint the problem.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Engine steam and antifreeze leak - 1976 Mercedes Benz 450SL

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Stalling engine, brakes, power steering and transmission failure

The stalling may well be caused by a failure of the crankshaft position sensor. This device provides timing instructions for the ignition system. When it fails, the engine no longer gets spark at the spark plugs and stalls. When the...

Q: Hesitating and missing in drive or park, fine over 45 mph

Hello. Quite a few different items can cause an erratic idle as well as an engine that misses. The spark plugs and wires are a great place to start. Other possible causes of this fault include: low fuel pressure, vacuum...

Q: Q: Car not starting.

Hi, there are three things you car need to start Air/fuel, compression, ignition. If one of these things is missing the car will not start. I would recommend having a technician come out and test these systems for failure. Most...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...