Question about 1994 BMW 3 Series

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What causes the car's exhaust to be red hot

Last tyme when i was driving my BMW 320i it failed. I stopped and checked underneath and i realised that its entire exhaust from the engine or that pipe for carbon monoxide was red hot. I tried to start it and it failed. I waited until it cooled down and it then started.It is now fine but even now stil I do not know what was the cause of that.

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Your Catalytic converter had gotten clog up, to much gas not enough air, will get RED HOT, need to have it check out, it will happen again if a piece blocks the out let again, due to the inside of it is broken.

Posted on Jul 21, 2010


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Which sign can show the danger of engine block damage

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2005 BMW 320i se petrol, seems to be getting seriously hot to touch around the gear stick area but not the gear stick itself, any idea what would be causing this??

IF there is no driveabilty problem meaning engine or gearbox It could only be defective heat shield or gear lever boot restricting exhaust and engine heat from travlling up into vehicle

Dec 07, 2014 | Cars & Trucks

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2002 ford escape red hot exhaust spudders and rpms drops to almost stall

Carol Ann,
Your catalytic converter is plugged up [restricted] This is causing the exhaust to get red hot and causing the reduction in power. You need to replace this part [$$$} The catalytic converter failed because you have been driving the car for months with the fuel mixture excessively rich.
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Have bmw 320i 2001 only 55570 miles. even driving after 10 miles engine get hot. no problems with driving , no warning light but it stays hot even after2 hours. please need advice. car was checked

This bmw is overheating , even after 2hrs, the engine will still be hot after it verheats. the basic thing to do first is to allow the engine to cool down 5-6 hours or even overnight.then check to see if the cooling system is full of coolant. this problem may be caused if lets say the coolant level is low, this can happen if theres a leak in the system. if low fill system and then have it checked for leaks.another problem if the system is not low then you may have a bad thermostat, a bad thermostat will not allow the coolant to flow inturn making engine overheat, the the last common problem could be a bad fan, start in the order i listed as far as the thermostat watch the gauge and feel the lower hose, if the gauge goes to hot and the lowe hose is luke warm or cold and the top radiator hose is hot then the thermostat is bad. the last test is for the fan, if the top hose and the lower hoses are hot and the car is starting to overheat then it may be the fan, see if the fan is spinning, this car may have an electric fan or belt driven fan, if its electric then see if its running, if the fan is not running then testing need to be done to see why, the fuse and the relay will need to be tested and then the fan itself. if the fan is belt driven then you will see if the belt is on the fan pulley and then check the fan clutch, the way the fan clutch works is the fan will run at a slowwer speed than the engine and then when the heat from the radiator gets hot and blows on the front of the clutch this causes the fan clutch to lock up and makes the fan spin faster. check to see if this is happening but if this were to be the problem or if the fan was aproblem the car would not overheat as you are driving rather it would overheat at a stop or in slow traffic because the air flow from the driving would act like a fan as the air flows through the radiator from driving this would cool the engine if it was the fan, but if the car overheats even while moving then it would not be a fan problem but rather the thermostat or low coolant. there is another problem but i would start with these. hope this is helpful.

Oct 02, 2011 | BMW Cars & Trucks

1 Answer

Throttle response lags,engine cut out at stops and have to depress accelarator when starting...,what can the problem be please? It's BMW 320i

Whens the last time it was tuned up? plugs, wires, cap and rotor,(if you have them), Air filter and fuel fliter. Any one and all of these can cause your problem.

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Heya, i got a E36 320i auto coupe. its not overheating standing, but its red hot after driving it a mile

this sounds like a water blockage, take off the water hose that goes to the engine block, start the engine, and see if there is water flow going to engine...if this is the problem, then you need to buy an engine flush fluid, and flush out your engine....please be carefull, as the E36 320i, has an aluminium head, and is easily warped by heat

Aug 10, 2009 | BMW 3 Series Cars & Trucks

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