Question about 1999 BMW 318 ti

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2001 318i e46 coolent level drop

My car is leaking coolent between the thermostat and the pipe from there to the radiator. I have replaced both the pipe and thermostat but it still leaks. I opened the pipe from the radiator to the cylinder head and it now leaks from there as well, The pipes are fitted correctly and clamped in properly. Please help, what could be causing it to leak. What can cause the build up of pressure. The car moves great and no smoke,or overheating or excessive water out the exhaust or mixing of oil and water.

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Croatian: problem is the head.

Posted on Nov 09, 2008

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Dodge shadow poor heat


Possible causes include low coolent level ( I know it sounds wrong, but if the coolent level is low hot coolent won't circulate to the heater core)

The thermostat may be stuck open, if it is the engine won't reach proper operating temp. Only solution is to replace, but it is easy to do and thermostats are inexpensive.

Heater core may be plugged, this is more likely if stopleak has ever been used to stop a radiator leak. Solution would be backflushing the heater core.

The valve that controls the flow of coolent to the heater core could be stuck or defective or the vacuum switch that controls the valve might be defective.

Jan 22, 2013 | 1994 Dodge Shadow

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How do you put radiator in 1999 hyandai accent


1) Drain radiator by removing cap, and bottom radiator drain bung or bottom hose.
2) Remove top hose.
3) Disconnect the radiator fan's wiring and any temperature sensor wiring if fitted.
4) Remove radiator retaining clasps
5) Disconnect radiator bottom hose.
6) If fitted with an auto box, then remove automatic gearbox oil pipes (Underside)(you might wat to clasp these so they don't leak oil everywhere)
7) Remove radiator expansion bottle feed pipe from top of radiator.
8) Ease out the radiator. If the radiator fan is getting stuck or caught up, then drop the radiator back down and remove the fan first after disconnecting from the radiator body.
9) With new and old radiator placed side by side on a soft surface, change across any components from the old radiator, which didn't come with the new one. These may or may not include such things as: cap, fan retaining screws or clips, bottom radiator seating rubbers, rubber fan shrouding, temperature sensor, top and bottom rubber hoses.
10) Rebuild by reversing the above instructions. Apply silicone pipe sealant to top and bottom hose locations. Make sure you clean and/or replace any heavily corroded metal pipes which connect to the radiator. (Now is also a good opportunity to replace the thermostat to be on the safe side)

11) Fill system with a fresh 50/50 water/antifreeze mix, flush out and refill expansion bottle. Just before you refill the system, turn the interior heater setting up to maximum heat, but do not start the vehicle.
12) Top radiator up to max. Gently massage the top radiator hose to help eliminate air from the system.
13) Once filled, start the car. Pay attention to the temperature. Keep topping up the radiator as bubbles come around the system and the coolant level drops. At the point no more bubbles appear, close off the radiator with the cap. Allow the engine to reach normal operating temperature. If the weather is cold you may want to hold the engine at around 2,500 revolutions to help build heat faster. Keep it running until the radiator fan kicks in, then let it idle for a couple of minutes.
14) Stop the engine and let it cool.
15) Once cool, open the radiator cap and top up again if level is low.

16) Road-test the vehicle. After returning check again for any leaks.


Running the car for the first few days after radiator replacement, check the radiator level and expansion bottle level every day for the first two or three days. This level may drop slightly as any trapped air pockets are pushed out while running. Also, it is possible that any small leaks may begin after adding fresh anti-freeze to the system. If you begin loosing fluid over these first few days, then re-inspect your work and run a cooling system pressure test.

Nov 13, 2012 | 1999 Hyundai Accent

1 Answer

After the car warms up coolent leaks out of the radiator cap overflow pipe, I already changed the cap but it still leaks. I checked the fuse for the radiator cooling fans and it is OK. What can be the...


Sounds like you need a new thermostat. Cap will only hold so much pressure and then it's made to release. Your cooling system is building up too much pressure for cap to hold.

Mar 14, 2011 | Cadillac Eldorado Cars & Trucks

1 Answer

Audi A4 1.9tdi Quattro 1997- Blower fan was only blowing cold air. Changed intercooler radiator as it was leaking, but fan still blowing cold air. engine temp went over half and then came back down. Only...


REPLACE THERMOSTAT.MAKE SURE COOLANT SUPPLY PIPE OR COOLANT RETURN PIPE NOT STOPPED UP AND YOU HAVE ENOUGH COOLANT IN THE SYSTEM.REPLACE THERMOSTAT.CRANK ENGINE UP AND LET IDLE UNTIL WARM UP KEEP EYES ON TEMPERATURE GAUGE. WHEN ENGINE THERMOSTAT OPEN COOLANT HOSE SHOULD BE HOT.IF NOT TURN OFF ENGINE.USE LARGE RAG WAIT A WHILE BEFORE REMOVING RADIATOR CAP CHECK TO SEE IF COOLANT LEVEL DROPPING IF SO ADD MORE COOLANT.CRANK ENGINE UP UNTIL THERMOSTAT OPENS UP.HOSE WILL GET HOT.IF STILL COLD CHECK COOLANT LEVEL.ONCE YOU AIR OUT COOLANT SYSTEM RADIATOR HOSES WILL GET HOT SO YOU WILL GET HEAT.IF COOLANT LOW YOU WONT GET NO HEAT.

Jan 09, 2011 | Audi A4 Cars & Trucks

1 Answer

How do i replace the water thmostat 99 6 cylider


WELL YOU NEED TO DRAIN COOLANT LEVEL BELOW THERMOSTAT LEVEL.YOU HAVE TO DISCONNECT MAF SENSOR LOOSEN AIRDUCT 2 LARGE CLAMPS LOOSEN REMOVE 4 SCREWS TO AIR FILTER COVER LIFT UP REMOVE COVER. THEN REMOVE AIR FILTER AND HOUSING, FIRST DISCONNECT MAF SENSOR.YOU HAVE TO DISCONNECT THROTTLE CABLE AND SHIFT CABLE.YOU HAVE TO DISCONNECT REMOVE THROTTLE BODY COOLANT HOSES DISCONNECT IDLE SPEED CONTROL VALVE CONNECTOR AND DISCONNECT TPS SENSOR CONNECTOR. THEN REMOVE THROTTLE BODY ASSEMBLY. YOU NEED TO BUY NEW THROTTLE BODY COOLANT HOSES AND NEW THROTTLE BODY GASKET FOLLOW TOP COOLANT HOSE TO ENGINE BLOCK.NOW YOU SEE CAN AND REMOVE THE THERMOSTAT HOUSING REPLACE THE THERMOSTAT.BESURE TO HAVE EXTRA COOLANT ON HAND.BLEED COOLANT SYSTEM WHEN DONE.TO BLEED COOLANT SYSTEM REMOVE RADIATOR CAP ON OVERFLOW JUG.THEN OPEN BLEED SCREW ON THE WATER PUMP BYPASS HOSE PIPE JUST A LITTLE.POUR COOLANT IN THE OVERFLOW JUG UNTIL LEVEL STOP DROPPING.STOP AT COLD MARK ON JUG.CLOSE BLEEDER SCREW ON WATER PUMP BYPASS HOSE PIPE.CRANK VECHICLE CHECK FOR LEAKS. START UP ENGINE LET IDLE FEW MINUTES THEN CHECK COOLANT LEVEL ADD MORE UNTIL UNTIL LEVEL STOP DROPPING.PUT RADIATOR CAP BACK ON OVERFLOW RESERVOIR. LET ENGINE IDLE WATCH COOLANT TEMPERATURE GAUGE.WHEN GAUGE START CLIMBING. TURN OFF ENGINE WAIT FEW MINUTES TAKE A LARGE RAG OPEN RADIATOR JUST A LITTLE YOU HEAR HISS NOISE.WHEN PRESSURE STABILIZE DONT GET SCALDED BECAREFUL.OPEN CAP LITTLE MORE.IF COOLANT PRESSURE STILL BOILS OUT WAIT 20 MINUTES ADD MORE COOLANT TO RADIATOR OVER FLOW WHEN COOLANT LEVEL STOP DROPPING.PUT RADIATOR CAP BACK ON START VECHICLE UP LET IDLE UNTIL THERMOSTAT OPEN. THEN FEEL TOP RADIATOR HOSE FEELS HOT THERMOSTAT OPEN WATCH TEMPERATURE GAUGE.IF GAUGE TEMP START CLIMBING TURN OFF ENGINE WAIT A WHILE.CHECK AND ADD MORE COOLANT.WHEN THE ENGINE CAN IDLE TEMP GAUGE STOP CLIMBING YOU HAVE BLEED COOLANT SYSTEM.KEEP CHECK ON COOLANT LEVEL.

Dec 29, 2010 | 1999 Oldsmobile Alero

1 Answer

Hi, Coolent puddle was formed under the bonnet after driving for straight 70kms. Overflow bottle was full and noises of boiling could be heard.Dont know what the problem is. Thanks


FIRST CHECK FOR LEAKS ON BLOCK THEN HOSES OR RADIATOR. THEN IF NOTHING FOUND RUN VEHICLE TO OPERATING TENP WATCH FOR EXCESS WATER OR MOISTER OUT TAIL PIPE.IF NOTHING FOUND CHECK THERMOSTAT,CHECK FOR FLOW IN RADIATOR

Dec 25, 2010 | 1997 Toyota Camry

1 Answer

My bmw overheats in about 5-10 mnts


Overheating is primarily caused due to low levels of coolent.Possibly it may be due to a leak in any of the pipes between the reservoir tank and radiator pipes.Or it may due to incorrect specifications of the coolent used. It may also be due to malfunction of the cooling fan due to an internal error in the circuitry.

Oct 09, 2009 | BMW 318 Cars & Trucks

2 Answers

Pipe that comes out of thermostat and goes into firewall is leaking coolent in '02 Impala, 3.4 liter? Whats this pipe? and can i use pipe dope or something?


This sounds like it goes to your heater core. It is like a small radiator inside your car that circulates hot engine coolant to give you heat when you turn on your heater. You should have rubber hoses that connect the heater core to the thermostat housing. Look closely as to what is leaking, the rubber hose, or the thermostat housing, and try to "snug" up the hose clamp if you can. Some time the thermostat housings corrode and leak. You will need to replace it if that's the case.(Keep in mide that some vehicles use clamps that are spring type, and you can't snug them up)

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2 Answers

Cooling Problem with '97 Subaru 2.5


sounds like one of 2 things, the thermostat or the engine has a leaking head gasket, replace the T-stat 1st, if the problem persists have the engine tested for blown head gasket(s) if the radiator was the problem u would have circulation and engine would overheat very slowly or just hotter than normal.

May 31, 2009 | 2003 Subaru Outback

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