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View Full Version : Need some heat troubleshooting.


Miguel
10-25-2005, 09:36 AM
Question...

While idling im getting neutral air blowing. I only get blasting heat when driving at 2000+ RPM. What could the problem be?

I havent changed my microfilter but im wondering what other causes there could be for this?

Justin e36
10-25-2005, 11:16 AM
you press the little button that circulates air from inside the cabin?
clogged cabin filter can do this... the fans move quicker when the car is in motion and are able to get past the filter gunk.

Miguel
10-25-2005, 04:36 PM
is a cabin filter the same as a microfilter? Is this something I'd buy from the stealership or is a cheaper one available somewhere?

Justin e36
10-25-2005, 06:38 PM
both the same thing.
bought mine from canadian tire. they had to order it in, had it for 8am the next morning. think the price difference is only a few bucks between the stealer and cdn tire. btw, i still owe you $$$... let me know when I can swing by...

PfaffTuning
10-25-2005, 07:28 PM
miguel, it sounds like the heater control valve under the hood on the driver side corner. its a unit that has the driver side and passenger side all in one. more than likely the plunger which allows the coolant to flow in to the heater core (the rubber seat) is ripped and as your driving the pressure from the water pump circulating the coolant is greater when accelerating, so it will actually get warmer until you slow down or have it in neutral or idle. used to be a common problem in those cars. anyways, i think its like 80 or 100 bux for the kit, something like that. not too difficult to replace either.

dave

ScotcH
10-25-2005, 08:15 PM
Coolant level will also give you these symptoms. I would check your level, and properly bleed the system.

rico328i
10-26-2005, 01:15 PM
For those who don't want to go to the dealership. Here's the Cdn Tire and/or PartSource product # :

COMPARTMENT AIR FILTER 23-3818-4 BM91127P

Supplier is : FREUDENBERG CANADA

$32.40 is price.

Miguel
10-26-2005, 03:07 PM
both the same thing.
bought mine from canadian tire. they had to order it in, had it for 8am the next morning. think the price difference is only a few bucks between the stealer and cdn tire. btw, i still owe you $$$... let me know when I can swing by...

I might as well try this first as it sounds like an easy cheap fix.

Coolant level will also give you these symptoms. I would check your level, and properly bleed the system.
I just had that done by Charlie so that can't be the problem : (

miguel, it sounds like the heater control valve under the hood on the driver side corner. its a unit that has the driver side and passenger side all in one. more than likely the plunger which allows the coolant to flow in to the heater core (the rubber seat) is ripped and as your driving the pressure from the water pump circulating the coolant is greater when accelerating, so it will actually get warmer until you slow down or have it in neutral or idle. used to be a common problem in those cars. anyways, i think its like 80 or 100 bux for the kit, something like that. not too difficult to replace either.

dave
You work at Pfaff??? I bought this E36 off Dave's brother-in-law.
Im going to try the cabin filter first... if that's not the cause then im moving ahead to your suggestion.

Where do I get the kit? what do I ask the BMW parts guys for?

I have a bad feeling that you're right :(

Miguel
10-26-2005, 07:16 PM
You work at Pfaff??? I bought this E36 off Dave's brother-in-law.
Im going to try the cabin filter first... if that's not the cause then im moving ahead to your suggestion.

Where do I get the kit? what do I ask the BMW parts guys for?

I have a bad feeling that you're right :(
Stupid me.... i guess I missed the part where you signed DAVE at the bottom of your post lol.

Jari
10-26-2005, 08:56 PM
I have the same problem. I still get air blowing through the vents but when I get off the throttle to idle the hot air turns to not so hot air. Low coolant would cause this but my coolant is fine. My initial thought was maybe a lazy water pump but then after thinking how a water pump is built, i would think it either works or doesn't. If you figure out the problem let us know.

Miguel
10-28-2005, 04:37 PM
OK, well... I just got back from BMW and Canadian Tire.
For the compartment air filter, BMW wanted $60 + tax. Part #64 11 9 069 895.
Canadian Tire wanted $32.40, $37.26 after tax. Part #23-3818-4 BM91127P

So you can guess which one I bought : )

Im going to try this first and see if it fixes the problem (which I doubt it will... but hell, im sure it was due for a change anyways!)

BMW quoted me $264 for a full Heater Control Valve Part #64 11 8 975 792 (See attached pic). If it comes to it, im hoping Charlie can diagnose exactly what the problem is... hopefully its a hose or fitting... something OTHER than the water valve.
http://www.realoem.com/bmw/diagrams/u/331.png
No. Description Supplement Qty From Up To Part Number Price Notes
01 WATER VALVE 1 64118375792
02 GROMMET 1 64126910076 $1.15
03 RUBBER MOUNTING 1 64111387472 $2.73
05 HOSE F WATER VALVE AND RADIATOR 1 64211387424 $9.38
06 HOSE F WATER VALVE AND RIGHT RADIATOR 1 64211394292 $5.88
07 HOSE F RADIATOR AND ENGINE RETURN 1 11531738053 $65.66
08 HOSE CLAMP L18-24 ? 07129952109
10 HOSE CLAMP L28-33 ? 07129952113

punnzzells
10-28-2005, 04:43 PM
Stupid me.... i guess I missed the part where you signed DAVE at the bottom of your post lol.



HAHAHAHHAAHHAHHAHAHAAA!!!!!

:D :D :D


that was rich!

mpower1226
11-12-2005, 02:27 AM
miguel, recently, im getting the same symptoms like you do. blowing air but on idle, just coool air comes out but step on gas gives heat.

now, changing cabin filter, did that help at all?

i have a feeling that it might be the heater valve.

what was the problem? let us know!

Justin e36
11-12-2005, 04:42 AM
now, changing cabin filter, did that help at all?

Yeah Miguel, did it help at all?

mpower1226
11-12-2005, 08:25 AM
miguel, it sounds like the heater control valve under the hood on the driver side corner. its a unit that has the driver side and passenger side all in one. more than likely the plunger which allows the coolant to flow in to the heater core (the rubber seat) is ripped and as your driving the pressure from the water pump circulating the coolant is greater when accelerating, so it will actually get warmer until you slow down or have it in neutral or idle. used to be a common problem in those cars. anyways, i think its like 80 or 100 bux for the kit, something like that. not too difficult to replace either.

dave

where can I get that heater control valve? is it also called water valve(i was looking at the diagram and it says watervalve).

it seems like its around 2~3 bills at the dealers, where can i get one for 80~90 bucks?

mpower1226
11-12-2005, 08:30 AM
here is lil something i found