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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series & 4 Series > E36 (1991 - 1999)

E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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Old 12-20-2012, 05:46 PM
bimmernewbie719 bimmernewbie719 is offline
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Join Date: Dec 2012
Posts: 1
Mein Auto: 95 325I
heat issues=/

Okay so i live in wonderful buffalo, and of course we all know the winters here are harsh, i just purchased me 95-325i about 3 weeks ago, with it being cold here i obivusly need heaty, the thing is i only get heat if the car is in motion, if i am not moving the air is as freezing cold as it is outside, now i dont know much of the history of this car except the pervious owner restored it to decent condtion from what some punk kid did to it before, but anyway about week one into owning the car i was sitting idle for about 20min waiting for my girlfriend to get out of work and i noticed the car over heated, it hasnt done it since that day but since then i have this heat issues, now ive searched the fourms for somthing similar to this and found nothing so my question is, is it the blower motor or a heater core, any help will be apperciated, thank you very much guys, if you need more info please let me know!
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Old 12-20-2012, 06:45 PM
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jonesin jonesin is offline
The Canadian Prick.
Location: Fort McMurray AB
Join Date: Dec 2008
Posts: 12,979
Mein Auto: '96 328is Cosmos
1. When was the entire cooling system last replaced? If the answer is either "I don't know", or "More than 75k miles ago", then replace it all. (Yes, all of it.) Radiator, upper rad hose, lower rad hose, bleeder screw (replace with brass one), expansion tank, radiator cap, thermostat, thermostat housing (replace with aluminum one), fan, both serpentine belts, water pump (replace with one with metal impeller). Make sure to use only BMW (Or Zerex G-05) coolant mixed 1:1 with distilled water.

2. For the current heat issue, odds are you have air trapped in your cooling system.

3. Google "Bleeding E36 Cooling System + Pelican DIY" and follow the procedure they describe and you should be good to go.
Originally Posted by hnaz View Post
I grew up in a time when the internet was just a baby. Grammar back then versus now... holy cow. You could watch the degradation of society as the internet became more mature.

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Old 12-20-2012, 06:47 PM
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drivinfaster drivinfaster is offline
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Location: in the sticks you piney
Join Date: Nov 2007
Posts: 12,240
Mein Auto: rescued bmw's
check your coolant level, if you are low you have a leak. find it, fix it. hope you didn't do any damage when it ran hot.

there are lots of threads to service the cooling system, so read up them if you are a diy'er.

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Old 12-20-2012, 07:47 PM
tchavera tchavera is offline
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Location: Chicago
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Posts: 625
Mein Auto: 323is
well of course replaced cooling system blablabla.. you're gonna get attacked on this site until you do so. (of course if you did replace you wouldn't have this problem). but i couldn't agree with df more. sounds like low coolant!!
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Old 12-21-2012, 02:25 PM
john kaminski john kaminski is offline
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Location: rochelle il
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Posts: 487
Mein Auto: 1994 325i
Could be broken/stuck thermostat, like I had with my 94 325i
Cheap Trick
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Old 12-22-2012, 08:41 AM
monko141 monko141 is offline
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Location: sutherlin oregon
Join Date: Sep 2007
Posts: 4
Mein Auto: 94 325is,91 318is x2
If you have heat in motion and your heater starts blowing cold when you are sitting at an idle it is this valve. http://bmwfans.info/parts/catalog/E3...ve_water_hose/ Part #1
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Old 12-22-2012, 10:10 AM
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ZeGerman ZeGerman is offline
Warm Leatherette
Location: Seattle, WA
Join Date: Mar 2009
Posts: 22,897
Mein Auto: 1998 BMW 328is
Originally Posted by monko141 View Post
If you have heat in motion and your heater starts blowing cold when you are sitting at an idle it is this valve.
Given the symptoms described, rather than the heater valve, it's actually much more likely to be due to low coolant, trapped air, or t-stat stuck open as mentioned above.

1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild

Last edited by ZeGerman; 12-22-2012 at 10:12 AM.
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Old 12-22-2012, 10:18 AM
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E36 Phantom E36 Phantom is offline
I Am The Machine
Location: Somewhere Between The Valley & The Bay
Join Date: Apr 2007
Posts: 20,930
Mein Auto: Dreier, Fünfer & Siebener
If the air keeps blowing, but cold, it's not your blower motor.

The heater core is the easiest place for air bubbles to get trapped and never get out. Tough to bleed. You need to get the car on an incline, turn the HVAC to full hot, and bleed from there.

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// Chad //
// 2006 BMW 330i Sport 6MT // 2006 Toyota Highlander Hybrid //
// 1997 Range Rover 4.0 // 1994 Range Rover Classic //
// 1997 Land Rover Discovery // 1998 Land Rover Discovery //
// 2009 Kawasaki Concours 14 // 2006 Kawasaki Ninja 250 //
// 1999 Chevy Tahoe //
Ok...this is getting ridiculous. Someone come buy a few of these things.

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You're a derbanana
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Old 12-27-2012, 02:13 AM
N:CR41G N:CR41G is offline
'97 318is Hellrot
Location: Sydney, Australia
Join Date: Mar 2009
Posts: 569
Mein Auto: 1997 BMW 318is E36
Still here Chad? Jeez... Its been years!
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Old 12-28-2012, 11:23 AM
BimmerBoy1986 BimmerBoy1986 is offline
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Location: New York City
Join Date: Jan 2012
Posts: 56
Mein Auto: 2007 335i Sedan
Could be a host of problems. Here's a list had an overheat myself last month.
Check the two tubes coming from your radiator one should be cold the other should be warm.
If not you water pump has prob failed. Make sure to change the t-stat while under there.
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