Question about 1999 BMW 5 Series

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I bought a UK spec E39 528i last year with an over heating problem (new head had been fitted)but still over heating.I bleed the water system and drove home just short of a 100 miles with no problem.Next day I drove a short distance,when she over heated,got here home ;et her cool down.Read up on bleeding,got the car front end up as far as possible. Still no luck,changed thermostat water-pump,then discovered the bottle on the side of the rad was leaking so I bought a new one,3 rad's later I decided the head had gone again,striped down and head checked,all OK.On refitting the head we discovered that the threads in the block had been helie coiled .Cut a long story short I ending up buying a 2nd user engine Fitted this and she starts on the button.but the same problem she's still over heating,and chucking out water and the pressure is building up in pipes as soon as we put the rad cap on,I've tried bleeding this car so many times its not funny,on one web forum it suggesting bleeding this back wards through the heater matrix that been tried today.less water coming out of the rad,no smoke out of the engine,spark plugs are dry.I've worked on BMW before,and toyota Estima's which are which are prone to over heating but this is getting beyond a joke.

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Remove the colas and repair or change it because the colas is not straight that's while there's pressure in pipes and inside water system .. the CO2 is going to mixed with water

Posted on Mar 19, 2011


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I have 2004 dodge ram 1500 I just put in a new engine, water pump, thermostat, radiator, hoses and a fan clutch still over heating any suggestions

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After a radiator refill start and run engine till hot then top up . If it still overheats it may have a compression leak or a cracked head . after the engine is hot ,fit a pressure gage to the radiator run engine under load and if pressure rises quickly it has leak or crack .

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do a full system flush on the radiator and engine and the lines to the heater. flush them out. also change the thermostat and the temp switch, the temp switch sensor is the one with only one wire on it with either a 11mm or 13mm head on it depending what one was fitted. after it is flushed reconnect the pipes add the water and antifreeze, when all clean in the system the water should come out clean. 50/50 water antifreeze should be used. leave the top off the header tank and run the engine with the heater on number one. keep squashing the pipes as the engine warms up to help get the air out and keep the header tank full to the top. when the fan kicks in to cool the rad turn off the engine and leave to cool down when cool top up to the line and put the cap back on. wile you are doing the bleeding you should see the temp go up. if the heat goes to or above a 100 and the fan does not come on then the fan switch or motor may need changing, thermostats last for around 5 years, temp switches can last up to 5 years temp switch for the fan can be around 3 to 8 years.

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I just put a brand new radiator and radiator cap in my car and its still over heating and now its misfiring what could be causing this?

Did you bleed the cooling system? and check operation of the thermostat, which should have been done after fitting radiator before finishing by putting on radiator cap.
If not remove radiator cap when cold get vehicle warm and check thermostat operation, while bleeding any air pockets in cooling system and if no flow and bubbles or it starts to boil (shooting water) out of radiator the thermostat could be jammed or head gasket blown.
Sounds like it could be a blown head gasket. Get it hot again and miss firing, remove and inspect all spark plugs you may find a very clean spark plug indicating water entry into that cylinder or even water/coolant droplets in spark plug. You can also hold paper over spark plug holes and give the engine a quick crank over to see if any water comes out of cylinder while cooling system is still under pressure, or use radiator pressure tester to pressurize cooling system, wait 5-10 minutes and then crank over checking for water/coolant in cylinders. Another tool to check for blown head gaskets that cause overheating is a TK Head check, which sniffs the cooling system for evidence of exhaust fumes in cooling system.

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2003 520i touring , system bled and re bled! new radiator fitted and thermostat and housing! overheating on idle?! re getting air sign of head gasket probs?! help

I am not familiar with this particular expansion tank, but with the e36 expansion tank, when it starts to crumble inside, it tends to pull air into the cooling system and cause problems. e36 tanks usually last 10-12 years before they start to crumble, but it is a possibility.
Do you turn on the key and turn up the heater so the heater valve opens when you are bleeding it? I run mine up on ramps so the bleed point is higher than the heater valve when I bleed them. The book does not say to do that so I don't know if it helps at all.

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2006 Equinox over-heating

There is a few things that could course your car to be over heating

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These are some of the common problems as your car is reasonable new i would't think the head gasket has gone it is more then likely what you say that the water pump is broke probably the impaler has broken off. To bleed the system you need to get it up to running temperature and remove the bleed screws in the cooling system starting from the highest one working down then back up. If you find it is hard to bleed and no coolant is being pushed out it is more then likely that the water pump has gone. To test if the head gasket has gone take off the oil cap and look for a mayo type gunk around it if there is then this means that water is getting into the oil system meaning the head gasket has gone another test is to use a spacial liquid that test for exhaust gases in the coolant system.


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My 2000 Montana does not blow out heat. A month after we bought the van we realized there was no heat. After a while it started over heating. We replaced the thermostat and fixed the cracked head gasket...

some of tose vans have bleeder plug you have to bleed the system some on the thermostat housing some on top of water pump it si 7 mill socket to bleed it

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I have a 93 Toyota 4 runner that I had to replace the head gaskets on do to the recall work over torqeing the headbolts. After replacing the gaskets I can't run it with the thermastat in with out it over...

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