Question about 2005 Mercedes-Benz Mercedes Benz E320 Cdi

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Mercedes-Benz e230 air pocket in cooling system

Had head gasket replaced, now no heat - shop said it's an air pocket - drive it to clear it up - 400 miles & 1 week later, still no heat - ???

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The shop is responsible for this. Driving it won't get the air out. There is a tool required to fill the cooling system and bleed out the air. If your 'mechanic' is really what he claims to be he should know that.

Posted on Apr 18, 2014

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It is OK to drive it I recommend you fix it when you can It is most likely the stop lamp switch located on the back of the brake pedal part is 25-35 dollars depending on where you live have it tested before replacing. If it tests good you have a faulty brake sensor in one of your wheels check brakes

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1 Answer

How to remove air pockets in the cooling system.

When you have air in your cooling system, check for leaking gaskets. Most of the time the head gasket is leaking. and it is just a matter of time the whole gasket blows out. It will cost you because the engine needs revision, once the head gasket blows. Don't drive till a tech has checked your engine.

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I have problems with my the Mercedes A170 CDI 2001 (W168) automatic transmission. There is high pressure in the cooling system (hoses are hard) when started the engine and coolant level fluctuates up and...

To have high pressure in the coolant system you have compression pressure escape into the coolant system. If you simply replaced the head gaskets without checking for cracks or having the head machined to eliminate warped head then you have pretty much wasted your money as the problem still exists. You will have to pull the head again and have it checked out. Put a coolant system pressure tester in place of the radiator cap and start the engine and see if there is a rise in pressure on the gauge.

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You could apply air pressure about 80psi to that cylinder at TDC on the fireing stroke and listen for air at the intake, or exhaust to see which valve is leaking or chek the crankcase breather for ring leakage. Also check the cooling system for head gasket leak. In any case it need to come apart !

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My 2008 Mercedes 350 is having heat problems ,,the engine heat meter is above the middle but not in the red zone though is that ok? the car is currently running 44000 miles

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possible causes and solutions to your problem:

1. leaks in the radiator / water hoses. have a radiator expert check your cooling system. water hoses are quite easy to replace. some would recommend replacing your radiator, some will suggest have it overhauled. if the price is almost the same, the go with the new radiator.
2. busted head gasket. this problem is not that serious, but needs immediate attention. due to blown head gasket, some oil and water that is circulating around your cylinder head will mix, thus the dark color of your water
3. cracks in the cylinder head. now this is a serious problem. have your cylinder head checked immediately. solution here varies from resurfacing to re-bore and re-sleeving of combustion chamber.

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1990 300c overheating. Are both electric fans supposed to come on? Any help would be appropriated. There is no coolant in oil or out the tail pipe as far as i can tell. Has hesitation. Temp keeps going...

I assume you have checked the cooling system to ensure that first, that it is completely full of coolant (not just the overflow tank) with no air locks and second that there are no leaks anywhere and the radiator cap is in good condition. The heater hoses and those pesky little bypass hoses in the cooling system tend to go hard and split if they are over 10 years old, allowing coolant loss. Those spring type hose clamps tend to be less effective in clamping as the hoses become hard. Worm drive ones are the best to use. Both cooling fans operate together on most larger cars.

If there are no leaks or air locks, the over heating could also be caused by a clogged radiator (more than 15% restriction in the radiator flow capacity will cause overheating problems), a faulty water pump or a faulty thermostat.

If there are no leaks and water pump and thermostat are working correctly, but undetected loss of coolant once the engine heats up, then it could indicate a problem with the head gasket (Usually caused by allowing engine to become excessively overheated when cooling system has run dry) allowing very hot high pressure combustion gases into the engine water jacket, which super heats the coolant in the engine block, which then boils off, and is released via the cap.

If unsure take vehicle to a cooling system specialist and have them do a pressure test and more thorough diagnosis.

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Over heating

maybe your had a blown head gasket .try pressurized your cooling sytem about 40psi wait 5 mins if pressure drop in mins you have blown head or leaks cooling system or try changed your thermostat

Jul 19, 2010 | 1995 Mercedes-Benz C-Class

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I am topping up the water every day on my P reg E230

if no water leaks can be found the only other place for it to leak is thru the head gasket.. If this car overheated then you may be looking at a engine replacment since not many mechanics will just do a head gasket. . The problem is this is an aluminum engine and when they overheat they tend to destroy head bolt threads that are in the block. seels a kit to redrill all the block threads but the kit alone is $500 bucks.

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1992 acura legend very weird problems

This particular model suffers with head gasket problems. I have had to replace head gaskets on several of these vehicles to solve the overheating problem. The two cylinders in the rear of the engine are the problematic ones. The head gasket goes bad in that area which sends combustion gas into the cooling system. This then creates air pockets which in turn causes the engine to run hot. The air pockets then shift and as water starts to circulate again, the temperature goes back down. This cycle repeats over and over.
Solution is to replace the head gaskets.

May 24, 2008 | 1992 Acura Legend

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