Question about 1999 BMW 323 Series

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Over heats 323I 1999 .. over heats.. why..help would be great.. Water pump good.. therostat took out..(would have replaced but no one had one) No milk in the oil.. Idles fine...does not over heat.. When driving for about 5 miles heat for the heater is on and off... After 5 mile tons of pressure builds up in the system and steams..

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Sorry to say, but this sure sounds like a blown head gasket . <0;<(=

Posted on May 30, 2009

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It's a head gasket. Trade it in as these engines do not handle overheat really well.

Posted on Jun 29, 2009

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3 Answers

Heater not working


can you smell antifreeze if so its the heater core

Dec 02, 2012 | 2000 Jeep Grand Cherokee

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Water not staying in my radiator 2000 323i bmw no sign of a leak and oil looks good


have a coolant system pressure test done and look for leaks at the welsh plugs, water pump hole under water pump, heater core inside

Oct 20, 2012 | 2000 BMW 323i

1 Answer

Overheating fitted new water pump and therostat


if its a high milage vehicle it might be the radiator. around 200.00 to replace. it could also be a head gasket. check to see if you are loosing coolent. last but not least the 5.0 (318) had problems with leaks under the intake. it would loose pressure and cause heating problems. again look for coolant loss.

Nov 30, 2010 | 1999 Jeep Grand Cherokee

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It over heats we replaced the thermistate (spelled wrong)flushed the radator still over heated took thermastate back out left it out it worked good but now is over heating again


CHECK WATER PUMP WEEP HOLE SEE IF ITS LEAKING ANTIFREEZE IF SO WATER PUMP SHAFT BEARING GOING BAD CAUSING WATER PUMP LOCK UP HARD TO TURN.MAKE SURE DRIVE BELT NOT SLIPPING DUE TO BAD BELT TENSIONER.CHECK TO SEE IF COOLING FANS TURN ON WITH AIR CONDITIONER ON HIGH.IF NOT CHECK HEATER + AC IGNITION FUSE.IF FUSE GOOD.YOU HAVE FAULTY COOLANT TEMPERATURE SENSOR.IF ALL LOOKS GOOD.CHECK ENGINE OIL IF LOOKS LIKE MILK SHAKE YOU HAVE LEAKING HEAD GASKET.IF OIL LOOKS GOOD.YOUR ENGINE CYLINDER BLOCK WATER CORES CLOGGED UP WITH RUST RESTRICTING COOLANT FLOW THROUGH THE ENGINE BLOCK TO REMOVE HEAT AWAY FROM THE ENGINE.BLOCK PROBABLY NEED FLUSHED OUT AT RADIATOR SHOP.

Jun 23, 2010 | 2001 Pontiac Grand Am SE

1 Answer

Dont get heat


maybe the flow thru the internal matrix is poor due to the water pump being on its way out? Or you could have a small leak that is causing the water to boil under normal driving, have you got any loss of coolant or overheating in the engine - even slight?

Also is there a valve controlling flow thru the core, as some cars have a shutoff valve that may be stuck, should be electrical but may be cable operated on yours as its a 4wd jeep etc.

Jan 15, 2010 | 1999 Jeep Grand Cherokee

1 Answer

I need to find a motor diagram for a 1999 bmw 323i. i need to replace the thermostat.


your thermostat is a black piece of plastic just above the water pump behind the water pump pulley. both radiator hoses go to it.

Jan 12, 2010 | 1999 BMW 323 Series

2 Answers

The car over heats in a matter of minutes. We put a new water pump on but we need to know where the fans sensors are? Cn you help?


If it's overheating in a matter of minutes from cold, it is probably not the fan or fan switches. If the gauge goes up that fast, it is often because of air in the system. When hot air hits a water sensor, the gauge will skyrocket. make sure the radiator is full and open any bleeders in the cooling system (if it has any) to purge all of the air out. Also, try turning on the air conditioner -- that should start the cooling fan -- to see if that makes a difference. One more thing: just because a part is new, don't assume it's good. I once saw a car overheating with no heat and a full radiator (classic water pump) with a new water pump on it. We took it off and realized the impellor (blades) was loose on the shaft! Good luck.

Nov 20, 2009 | 1997 Dodge Intrepid

1 Answer

My heat in my 99 bmw 323i will not blow hot air. what could be wrong?


Low coolant level or improper themostat are the primary causal reasons for this. if tou have no leakage on the under dash carpet your heater core is unlikely cause. Change you therostat if fluid level is o k easy repair on a 323

Oct 12, 2009 | 1999 BMW 323 Series

1 Answer

Not getting heat into the car 323i bmw 1997 touring


Thermostat , ITS ABOUT $60 CHANGE IT :)

Feb 01, 2009 | 1999 BMW 323 Series

2 Answers

2000 Pontaic Montana


I have a 2000 montana and mine was doing the same thing. I replaced intake manifold gaskets, thremostat, and water pump. Turns out it my heads were warped. I had them taken to a machine shop and it has seemed to fix my overheating problems.

Oct 21, 2008 | 1999 Pontiac Montana

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