Top Radiator Hose is HARD and HEATER is Blowing Cold Air
Moderators: GRNSHRK, ron, bfons
-
- Posts: 2072
- Joined: Wed May 23, 2007 11:31 pm
- Location: Baltimore .Md HON
Top Radiator Hose is HARD and HEATER is Blowing Cold Air
I dont get it the Heater is Blowing Cold Air when on HOT and on High and I noticed the top Radiator Hose gets Hard when the motor is Hot.
1981 635 German FRANKEN6ER gray market RIG, 1988 635,91 Nissan 240SX , 1993 Harley 1340ccFXR Super Glide, 2000 M2 Buell 1200cc.
- 86_6series
- Platinum Member
- Posts: 1073
- Joined: Mon Apr 02, 2007 10:08 pm
- Location: West Nyack, NY
Re: Top Radiator Hose is HARD and HEATER is Blowing Cold Air
Make sure your heater valve is working, opening to let hot water into heater core.
#1
https://www.realoem.com/bmw/enUS/showpa ... Id=64_0091
When the engine warms up and the thermostat opens to let hot water to the radiator the hose will feel hard
because it's under presser.
#1
https://www.realoem.com/bmw/enUS/showpa ... Id=64_0091
When the engine warms up and the thermostat opens to let hot water to the radiator the hose will feel hard
because it's under presser.
86-635CSi
96-MB C220 SOLD
98-740i
71-Continental MK3
96-MB C220 SOLD
98-740i
71-Continental MK3
-
- Platinum Member
- Posts: 4493
- Joined: Tue Mar 16, 2010 8:32 pm
- Location: usually in the barn, Kent, England.
Re: Top Radiator Hose is HARD and HEATER is Blowing Cold Air
If the valve is working, then you must have a blockage either in the heater matrix or one of the hoses.
-
- Posts: 55
- Joined: Wed Oct 09, 2019 2:25 pm
- Location: Texas
Re: Top Radiator Hose is HARD and HEATER is Blowing Cold Air
I've recently dealt with similar symptoms, mine were intermittent though. Heater valve failed. there is a rebuild for about 15 dollars on one of the parts stores. Pelican maybe? beats the 300 dollars asked for the whole valve. easy rebuild too.
L6
85 M635
85 M635
- 86_6series
- Platinum Member
- Posts: 1073
- Joined: Mon Apr 02, 2007 10:08 pm
- Location: West Nyack, NY
Re: Top Radiator Hose is HARD and HEATER is Blowing Cold Air
I've owned my 6 for almost 32 years. I tried repair kits twice with little longevity.
Since I knew I would never sell it, and sometimes I would drive it in the dead of winter,
I went with the OEM part way back when and never looked back.
Just saying that be prepared if the repair kit doesn't last that long.
Bob V
Since I knew I would never sell it, and sometimes I would drive it in the dead of winter,
I went with the OEM part way back when and never looked back.
Just saying that be prepared if the repair kit doesn't last that long.
Bob V
86-635CSi
96-MB C220 SOLD
98-740i
71-Continental MK3
96-MB C220 SOLD
98-740i
71-Continental MK3
-
- Posts: 2072
- Joined: Wed May 23, 2007 11:31 pm
- Location: Baltimore .Md HON
Re: Top Radiator Hose is HARD and HEATER is Blowing Cold Air
Is there a Fuse to it. Maybe I can bypass it.Is there a RELAY to it????
1981 635 German FRANKEN6ER gray market RIG, 1988 635,91 Nissan 240SX , 1993 Harley 1340ccFXR Super Glide, 2000 M2 Buell 1200cc.