Question about 1998 BMW M3

1 Answer

Heater fault just replaced rad,water pump,thermostat but cant get heaters worm in cab cant find a bleed screw any advise

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 625 Answers

Make sure to find the hoses going to the firewall or to the cab from engine, they turn hot, both has to be hot if one is hoter than the other, that means your heater core under the dash is cloged, or the valve controling the flow is not opening, the valve is under the engine compartment, somewhere between the hoses, and
if both hoses turn hot, then you might have a bleen door inoperative blend door controls the cold or heat passege in the cab, try that and i will apreciate your feedback

Posted on Jul 02, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have no heat inside my cab on a 2003 dodge ram 2500. heater core is not blocked

either you have a bad thermostat or you have a air lock in your heater hoses remember your heater is fed by the hose by the upper rad hose return is the hose going to the water pump, to bleed the air out fill rad leave the rad cap off start engine run for 5 min. the check the coolant level,fill to top of neck replace rad cap tight, K-D tools make a special funnel to solve this air lock problem

Aug 09, 2014 | 2003 Dodge Ram Pickup 2500

1 Answer

How to bleed an air pocket out of a heater line

there should be bleed screws where the rad hoses join to water pump,thermostat housing ,also run engine with the heater turned to full heat when doing the bleeding as can get air pocket in heater matrix

Apr 21, 2014 | 2004 Dodge Ram 1500

2 Answers

My 2002 buick century overheats and has no heat

Possible trapped in system. Bleed system, should have two small screw bleeders, one in front of left valve cover on pipe behind water pump and the other on coolant pipe outlet as you follow upper rad. hose towards engine. Engine cool, remove rad cap, open both bleed screws and fill rad until coolant flows free out both bleed ports. close both bleed screws, rad cap off, start engine and let idle until upper hose is hot to touch , shut off, let it cool down for 20 minutes, top up rad and install cap. restart car ,drive and check.

Jan 02, 2014 | 2002 Buick Century

2 Answers

1997 Chevy Silverado 1500 heater has not worked since water pump was replaced

did you bleed the system. you have to run the vehicle with the rad cap off ,controls set to hot and keep it revved up to 1500 should girgle inside indicating movement of water. top up and overflow the rad and close the rad cap.once the heat comes thru. if no heat then go after the thermostat.

Nov 04, 2013 | Cars & Trucks

1 Answer

1994 dodge caravan 3.3 L . I replaced thermostat 195. filled rad , ran motor for 1 hour with cap off , no bubbles, put cap on , ran 10 min, temp in car low worm not hot worm.

so we can assume you removed all bubbles by bleeding and no vapor lock in engine.(i assume that you did this when in front of car is raised to collect bubble at highest point)

if done correctly there should not be any bubbles in system. so we can say that your cabin heater core is clogged partially. remove is and clean it. if it cant be done you need a new heater core. to reach it you need to remove some dash panels. dont brake clips when removing dash.

Nov 22, 2011 | 1994 Dodge Caravan

2 Answers

Just refilled all of antifreeze and temperature inside car blows cold and sometimes hot is it the thermostat?

could be the thermostat also could be air locking in the heater hoses as well as the heater controll valve is malfunctioning

Jan 20, 2010 | 1999 Lincoln Continental

1 Answer

My heater stopped working and I replaced the thermostat and checked fuse. What else could it be

if you drained all the water out the engine you may need to bleed the air out of the heater to get it to work right,
look for a plastic bleed velve on a rubber hose it will be high up above the rad or header tank fill rad with water open bleed velve and let water out till no air is in it, top up water in rad,,, do this with a cold engine,,

Oct 31, 2009 | 2005 Chevrolet Malibu Maxx

3 Answers

1996 328IS, Over heating after 25 minutes of idling,

clogged with old rad chunks
no white smoke

Sep 05, 2009 | 1997 BMW 328

1 Answer

Losing coolant thro the expansion tank at a rapid rate, 4 litres after 40 miles, no visable leaks, rear heater pipes replaced and new rad and water pump

Not too familiar with this model but.... First some questions! Has the fault started after the pipes & rad replaced or were they replaced to remedy problem? If fault happened since work then i'd suggest an air lock in the system in which case you will need to 'bleed' the system of air. Make sure the expansion tank is the highest point & look for any bleed valves on the hoses - usually near the heater matrix. Sometimes it may be necessary to help the process by removing the temperature guage sender unit to allow the air to escape as air cannot pass through a closed thermostat. If the fault was there before, does the expansion tank seem to build up pressure very quickly? Do lots of air bubbles appear with the engine running & the pressure cap off?

Aug 22, 2008 | Kia Sedona Cars & Trucks

Not finding what you are looking for?
1998 BMW M3 Logo

138 people viewed this question

Ask a Question

Usually answered in minutes!

Top BMW Experts

Anthony Jones
Anthony Jones

Level 2 Expert

128 Answers


Level 2 Expert

254 Answers


Level 2 Expert

281 Answers

Are you a BMW Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides