Question about BMW 318

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1991 bmw 318is 4 door 16 valve motor, runs hot and radiator cold

1991 bmw 318is 4 door 16 valve motor, new thermostat and housing replaced car was overheating, put a new one in and still no circulation radiator still cold even after the car started running hot, is there something else i should check, the water pump seems to be good no leaks and such, HELP PLEASE!!! i am so lost

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  • BMW Master
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You may have bad waterpump,the impeller on pump may be borken, just because it doesnt leak doesnt mean its good.also could have exhaust entering cooling system (bad headgasket) if pump is good have a block test done.

Posted on Sep 29, 2009

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After installion of a new radiator in my 1991 BMW 735i my temp gauge is shooting right up to the red.There is no air in the system and the temp at the thermostat is showing 180 degrees.Replaced the temp...


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if the engine is hot see if the radiator fan starts running if not see the cables that are attached to the fan and also see the thermostat

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I dont have any heat and i need to know how to replace the hearter core, however the windows aren't fogging up so maybe its the thermostat


the only way you should have to replace a heater core is if it leaks or gets plugged up. When motor is hot feel the two hoses that go to the heater core. one should be fairly hot and the other should be the same but if one is just warm then follow hose and locate a flow valve and check for operation. OPening and closing with control hot /cold knob. Check coolant level in radiator while cold as well as fill reservoir to full when cold. Also remove radiator cap when cold and warm truck and check for flow of coolant. if lower radiator hose is hot hot hot and upper hose is cool then thermostat may not be opening properly, or thermostat is stuck open not building heat. You didnt mention if truck was overheating?? If its not i'd check for the flow valve operation, if it is i'd make sure coolant levels are full and waterpump is working.

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How do i bleed my radiator on my bmw z3 1998


you can't bleed just the radiator, you have to bleed the cooling system through the bleed holes while it's hot and pressurized and running.

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Jun 28, 2010 | 1998 BMW Z3 Roadster

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Overheating: 1999 bmw 323i m series 2.5 ..Installed: new water pump , thermostat. radiator,new Water Reservoir, cap.. hose on top side hot , lower hose cold even when engine is hot..no water circulating at...


the water pump and thermostat should have solved it. an air pocket can cause that but usually not to that degree.

don't get one of those cheap *** plastic impeller water pump for sissies. Get the metal impeller one. get a cool running thermostat and drill two 3/16" holes in it 180 degreess from each other. you may have installed the t-stat backwards.

Jun 03, 2010 | 1999 BMW 323 Series

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Walk through on how to replace a thermostat in a 2001 Jeep grand Cherokee


Jennipherbrr,

1. Make sure the car is cold. Remove the radiator cap (press & turn about 1/4 turn to remove pressure in the system) Once the pressure is bled off you can remove cap and leave it rest on the filler opening.

2. Find the petcock on the radiator (the little valve attached to the radiator. You have to open/turn clockwise to drain the anti-freeze. Drain anti freeze below thermostat housing. About 1/2 to 1 gallon.

3. Have a catch basin for the anti freeze under the car. Remove upper radiator hose from radiator and thermostat housing.

4. Remove thermostat housing from engine block (usually two or three bolts in the thermostat housing). Scrap off ALL old gasket material from engine block. Double check and make sure all gasket material is removed from surface. If not the thermostat housing will leak.

5. Install new gasket with some high temp silicone. Place a couple of dabs on the thermostat housing and gasket (the silicone is used to keep the gasket in place) *MAKE SURE YOU INSTALL the thermostat the same way you took it out. Don't over tighten the thermostat housing bolts.

6. Remove the radiator cap and replace the anti freeze you removed (make sure the anti freeze is clean). Fill the radiator to the top of the filler neck and replace the radiator cap (push and turn the radiator cap to the right- like a pill bottle). Start the car and make sure the temperture guage goes up. The guage pointer should be in the middle of the guage.

7. Check the radiator reservoir for proper anti freeze level. DO NOT OPEN THE RADIATOR CAP WHEN THE CAR IS HOT!!! THE ANTI FREEZE IS HOT AND WILL BURN YOU.

Hope this helps

Apr 19, 2010 | 2001 Jeep Grand Cherokee

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I changed the water pump thermostat and heater core and still no heat what else can be wrong 1996 chevy lumina car


1)Air trapped in system
2)plugged radiator
3)collapsed heater hoses while engine is running
4) heater control valve
5) blend door motor for hot/cold (VERY COMMON)

Jan 30, 2010 | 1996 Chevrolet Lumina Mini

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Where is the thermostat located on a 1991 hona accord


1991 Honda Accord 2.2L FI 4cyl

  1. With the engine cold, drain the cooling system.
  2. Disconnect the radiator hose from the thermostat housing outlet.
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Fig. 1: Use a pair of pliers to compress the spring clamp, then slide it up the hose and disconnect the hose from the housing
  1. Remove the thermostat housing outlet and remove the thermostat.
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Fig. 2: Remove the nuts/bolts securing the thermostat housing ...

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Fig. 3: ... then remove the thermostat housing

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Fig. 4: Once the housing is removed, the thermostat can be removed from the engine
  1. Using a putty knife, clean the gasket mounting surfaces.
If the thermostat is equipped with a pin valve, be sure to install the thermostat with the pin facing upward.

More details find in autozone.com (free register).

I hope help you with this. Good luck (remember rated this help)

Oct 13, 2009 | 1991 Honda Accord

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Please help


possible coolant blockage in engine. Fan does not run because temp sensor is located is part of coolant that is not getting hot. Describe loud noise please. You are likely facing terminal engine failure, however, try back-flushing coolant passages on engine. This may be tricky, but you could remove thermostat and try running engine, or fabricate a rubber stopper on the end of a garden hose to put in hole where thermostat goes, remove lower radiator hose and flush water as hard as possible. A big rust flake could be blocking coolant flow. PS: have you recently had any work done on cooling system? I have seen some stupids use so much sealant when replacing a water pump that excess blocks coolant flow. Lots of luck. "The rusty one"

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