Question about Mercedes-Benz Fujimi Mercedes Benz W168 Assist M's 1/24 Model Kit
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.
Posted on Nov 28, 2013
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Posted on Jan 02, 2017
hello,according to service information;smoke formation or si 07.16-p-0004a (service inform) from mb ,your engine have normal function,if you want ,ask your dealer about the service inform with number 07.16-p-0004a,you can read the explanation regarding your problem,ty
Posted on Apr 23, 2009
Unless there are warning lights indicating some sort of mechanical malfunction I would not worry about this. If this were a gasoline engine it would be disconcerting. Diesels on the other hand are more prone to producing soot, and in recent years have come under attack for this reason. The reason this happens is that when you are accelerating hard you are forcing more fuel to be burned in each firing cycle. Soot is simply the product of inefficient combustion.
Posted on Jul 08, 2010
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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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