Question about 1988 Mercedes-Benz 300

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Hi : question

I have a 1989 mercedes benz 300 SE and it ran hot on me today the cage got up to 120 which is the highest my cage goes to and the car was smoking from under the hood of the car what should i do please ? same problem, 300 E'88, all of those suggested fixes done already including new head gasket. So what is My problem?

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There are a host of issues that can cause a vehicle to overheat. Getting from what damage has been done to what caused the damage will be tricky. Here is what I would do in you position.
Repair issues as found.

1) Check the fans, you should have 2 coloing fans, one for the a/c and one for the cooling system.
Make sure that neither are frozen and that both turn freely without growling sounds.
*Growling, noisy, frozen motors will need to be replaced.

2) Refill the radiator with fluid, (just use water right now no use wasting money on antifreeze until the problem is resolved), check for leaks.
*Repair all leaks found.

3) Start the engine Hold your hand pressing lightly where the radiator cap goes, if you are building pressure there within say a minute or so then you have combustion entering the cooling system.
*If pressure is building then internal damage has been caused and will need to be addressed by a competant mechanic/shop.

4) Keep the coolant reservoir full as the temperature rises to normal operating temperature. Listen and watch for the fan motor to start at the temperature rises. Turn the A/C off during this process, don't mistake the A/c fan for the cooling fan.
*If fan does not come on then you will need to check voltage to the fan motor to see if there is a problem with the fan or the electrical system to the fan such as fuses, relays senders or wiring.
**If fan is operating then probable cause is a sticking/stuck thermostat.

Once problems have been found and resolved drain and refilll cooling system with a 50/50 solution water/antifreeze.

Also replace the radiator cap unless you have the ability to pressure test the one you have already.

Hope that helped,
Good Luck

Posted on Nov 23, 2008

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Hi : question


Check to see if it needs coolant. It could also need a radiator flush, new thermostat or you have a leak in your radiator. It is well worth the money to have it all done at one time. A radiator flush is part of regular maintenance in any vehicle. I would not drive the car if it is over heating. Get it to a shop that you can trust and have them look at it. Driving any car that over heating does alot of damage to the engine.

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