The BMW UUC Digest
Volume 3 : Issue 155 : "text" Format
Messages in this Issue:
Re: E34 M30 Overheating
Re: E34 M30 Overheating
Re: E34 M30 Overheating
Re: E34 M30 Overheating
Re: E34 M30 Overheating
----------------------------------------------------------------------
Date: Fri, 26 May 2006 15:45:25 -0700
From: "JS Nord" <[EMAIL PROTECTED]>
To: "Robert Blakeney" <[EMAIL PROTECTED]>,
<[email protected]>
Subject: Re: E34 M30 Overheating
Message-ID: <[EMAIL PROTECTED]>
Curious. Couple suggestions:
- have you drilled a small hole in the thermostat plate? Helps immensely
with getting the air pockets out. Install with hole at the top of the
housing. The hole trick makes bleeding simple and fool proof. It's a bit
of a trick to get the air out of these systems I've found.
- do you know if your fan clutch is really working? When it is, as the car
heats up (extended stoplight on a 75+ degree day), you should hear a
distinct roaring sound under the hood as you pull away from the light. Sort
of like a schoolbus. If you're not hearing that, then I'm not sure the fan
clutch is really working.
- if you can rev the engine to help cool, I'm not sure how you could have a
slipping impeller.
- you're bleeding the engine with the heater valve open, right?
- is the water pump / fan belt tight?
- are all the clamps tights? I've seen systems suck in air as they cool
(but not leak when hot) with loose clamps.
Maybe one of these idea's might help.. Good luck...let us know what it
turns out to be.
Jeff
90 535i
-
----- Original Message -----
From: "Robert Blakeney" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, May 26, 2006 1:59 PM
Subject: [UUC] E34 M30 Overheating
> I've reached my total level of incompetence with my 1990 535iA cooling
> system. The radiator is new (which started this effort) along with the
> thermostat, expansion tank cap, viscous fan clutch, and upper radiator
> hose. System has been flushed very well, pressure tested by MPH in Houston
> and found to hold pressure and be in good shape. Water pump has about 25k
> on it. Aux fan is working properly with a new radiator sensor switch.
> Small return hose to expansion tank is clear. I've bled the system several
> times on flat pavement and with the car on ramps.
>
> It runs fine with the temp needle in the middle on the way to work, about
> 12 miles. I get in the car in the evening on the way home and the temp
> gauge starts a steady hike all the way to red as the engine heats up.
> turning on the heater and revving the engine quickly brings it back down.
> As long as the car is moving the temp will hold in the middle, but any
> stopping starts the temp back up and I have to hit the heater again.
>
> Could the impeller on the water pump be spinning on its shaft? Any
> thoughts, suggestions?
>
> I'm stumped.
>
> Robert
> 1990 535i 160,000 miles
>
>
> Search the ARCHIVES:http://www.mail-archive.com/[email protected]
>
>
> __________________________________________________________________________
> In memory of Michel Potheau - friend, enthusiast, founder of the BMW CCA.
>
> UUC Motorwerks - BMW Performance Fine-tuning and home of the Ultimate
> Short Shifter - accept no substitutes!
> 908-874-9092 . http://www.uucmotorwerks.com
>
------------------------------
Date: Sat, 27 May 2006 09:17:14 -0400 (GMT-04:00)
From: Maverick <[EMAIL PROTECTED]>
To: [email protected]
Subject: Re: E34 M30 Overheating
Message-ID: <[EMAIL PROTECTED]>
Don't forget a sticky thermostat can do this too.
David in Richmond,VA
-----Original Message-----
>From: Paul Garnier <[EMAIL PROTECTED]>
>Sent: May 27, 2006 1:33 AM
>To: 'Robert Blakeney' <[EMAIL PROTECTED]>, [email protected]
>Subject: Re: [UUC] E34 M30 Overheating
>
>Fan clutch, aux fan, aux fan temp sensor/switch, aux fan resistor, aux fan
>relay, aux fan connector, cracked head/leaking head gasket/warped head.
>
>Try the fan clutch, and aux fan stuff 1st...
>
>Paul A. Garnier
>Houston, TX
>281-827-0725
>www.fastnetworking.com
>
>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED] On Behalf Of Robert Blakeney
>Sent: Friday, May 26, 2006 4:00 PM
>To: [email protected]
>Subject: [UUC] E34 M30 Overheating
>
>I've reached my total level of incompetence with my 1990 535iA cooling
>system. The radiator is new (which started this effort) along with the
>thermostat, expansion tank cap, viscous fan clutch, and upper radiator hose.
>
>System has been flushed very well, pressure tested by MPH in Houston and
>found to hold pressure and be in good shape. Water pump has about 25k on it.
>
>Aux fan is working properly with a new radiator sensor switch. Small return
>hose to expansion tank is clear. I've bled the system several times on flat
>pavement and with the car on ramps.
>
>It runs fine with the temp needle in the middle on the way to work, about 12
>
>miles. I get in the car in the evening on the way home and the temp gauge
>starts a steady hike all the way to red as the engine heats up. turning on
>the heater and revving the engine quickly brings it back down. As long as
>the car is moving the temp will hold in the middle, but any stopping starts
>the temp back up and I have to hit the heater again.
>
>Could the impeller on the water pump be spinning on its shaft? Any thoughts,
>
>suggestions?
>
>I'm stumped.
>
>Robert
>1990 535i 160,000 miles
>
>
>Search the ARCHIVES:http://www.mail-archive.com/[email protected]
>
>
>__________________________________________________________________________
>In memory of Michel Potheau - friend, enthusiast, founder of the BMW CCA.
>
>UUC Motorwerks - BMW Performance Fine-tuning and home of the Ultimate
>Short Shifter - accept no substitutes!
>908-874-9092 . http://www.uucmotorwerks.com
>
>
>Search the ARCHIVES:http://www.mail-archive.com/[email protected]
>
>
>__________________________________________________________________________
>In memory of Michel Potheau - friend, enthusiast, founder of the BMW CCA.
>
>UUC Motorwerks - BMW Performance Fine-tuning and home of the Ultimate
>Short Shifter - accept no substitutes!
>908-874-9092 . http://www.uucmotorwerks.com
------------------------------
Date: Sat, 27 May 2006 16:14:24 -0500
From: "Paul Garnier" <[EMAIL PROTECTED]>
To: "'Maverick'" <[EMAIL PROTECTED]>, <[email protected]>
Subject: Re: E34 M30 Overheating
Message-ID: <[EMAIL PROTECTED]>
Not to be sassy, but since my t-stat's get OE equipment replaced with my
water pumps, or rad's or hoses, or just about any cooling system event, I
haven't had a "sticky" t-stat since my e12 530i when I was 16.
NOT overheating in Houston,
Paul A. Garnier
Houston, TX
281-827-0725
www.fastnetworking.com
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Maverick
Sent: Saturday, May 27, 2006 8:17 AM
To: [email protected]
Subject: Re: [UUC] E34 M30 Overheating
Don't forget a sticky thermostat can do this too.
David in Richmond,VA
-----Original Message-----
>From: Paul Garnier <[EMAIL PROTECTED]>
>Sent: May 27, 2006 1:33 AM
>To: 'Robert Blakeney' <[EMAIL PROTECTED]>,
[email protected]
>Subject: Re: [UUC] E34 M30 Overheating
>
>Fan clutch, aux fan, aux fan temp sensor/switch, aux fan resistor, aux fan
>relay, aux fan connector, cracked head/leaking head gasket/warped head.
>
>Try the fan clutch, and aux fan stuff 1st...
>
>Paul A. Garnier
>Houston, TX
>281-827-0725
>www.fastnetworking.com
>
>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED] On Behalf Of Robert Blakeney
>Sent: Friday, May 26, 2006 4:00 PM
>To: [email protected]
>Subject: [UUC] E34 M30 Overheating
>
>I've reached my total level of incompetence with my 1990 535iA cooling
>system. The radiator is new (which started this effort) along with the
>thermostat, expansion tank cap, viscous fan clutch, and upper radiator
hose.
>
>System has been flushed very well, pressure tested by MPH in Houston and
>found to hold pressure and be in good shape. Water pump has about 25k on
it.
>
>Aux fan is working properly with a new radiator sensor switch. Small return
>hose to expansion tank is clear. I've bled the system several times on flat
>pavement and with the car on ramps.
>
>It runs fine with the temp needle in the middle on the way to work, about
12
>
>miles. I get in the car in the evening on the way home and the temp gauge
>starts a steady hike all the way to red as the engine heats up. turning on
>the heater and revving the engine quickly brings it back down. As long as
>the car is moving the temp will hold in the middle, but any stopping starts
>the temp back up and I have to hit the heater again.
>
>Could the impeller on the water pump be spinning on its shaft? Any
thoughts,
>
>suggestions?
>
>I'm stumped.
>
>Robert
>1990 535i 160,000 miles
>
>
>Search the ARCHIVES:http://www.mail-archive.com/[email protected]
>
>
>__________________________________________________________________________
>In memory of Michel Potheau - friend, enthusiast, founder of the BMW CCA.
>
>UUC Motorwerks - BMW Performance Fine-tuning and home of the Ultimate
>Short Shifter - accept no substitutes!
>908-874-9092 . http://www.uucmotorwerks.com
>
>
>Search the ARCHIVES:http://www.mail-archive.com/[email protected]
>
>
>__________________________________________________________________________
>In memory of Michel Potheau - friend, enthusiast, founder of the BMW CCA.
>
>UUC Motorwerks - BMW Performance Fine-tuning and home of the Ultimate
>Short Shifter - accept no substitutes!
>908-874-9092 . http://www.uucmotorwerks.com
Search the ARCHIVES:http://www.mail-archive.com/[email protected]
__________________________________________________________________________
In memory of Michel Potheau - friend, enthusiast, founder of the BMW CCA.
UUC Motorwerks - BMW Performance Fine-tuning and home of the Ultimate
Short Shifter - accept no substitutes!
908-874-9092 . http://www.uucmotorwerks.com
------------------------------
Date: Fri, 26 May 2006 18:44:56 -0400
From: "Gary Derian" <[EMAIL PROTECTED]>
To: "Robert Blakeney" <[EMAIL PROTECTED]>,
<[email protected]>
Subject: Re: E34 M30 Overheating
Message-ID: <[EMAIL PROTECTED]>
That is classic cooling fan trouble. I can't explain why considering you've
replaced ecverything. Since the heater works, the water pump is pumping.
When the evidence conflicts with your theory, get a new theory.
Gary Derian
> I've reached my total level of incompetence with my 1990 535iA cooling
> system. The radiator is new (which started this effort) along with the
> thermostat, expansion tank cap, viscous fan clutch, and upper radiator
> hose. System has been flushed very well, pressure tested by MPH in Houston
> and found to hold pressure and be in good shape. Water pump has about 25k
> on it. Aux fan is working properly with a new radiator sensor switch.
> Small return hose to expansion tank is clear. I've bled the system several
> times on flat pavement and with the car on ramps.
>
> It runs fine with the temp needle in the middle on the way to work, about
> 12 miles. I get in the car in the evening on the way home and the temp
> gauge starts a steady hike all the way to red as the engine heats up.
> turning on the heater and revving the engine quickly brings it back down.
> As long as the car is moving the temp will hold in the middle, but any
> stopping starts the temp back up and I have to hit the heater again.
>
> Could the impeller on the water pump be spinning on its shaft? Any
> thoughts, suggestions?
>
> I'm stumped.
>
> Robert
> 1990 535i 160,000 miles
>
>
> Search the ARCHIVES:http://www.mail-archive.com/[email protected]
>
>
> __________________________________________________________________________
> In memory of Michel Potheau - friend, enthusiast, founder of the BMW CCA.
>
> UUC Motorwerks - BMW Performance Fine-tuning and home of the Ultimate
> Short Shifter - accept no substitutes!
> 908-874-9092 . http://www.uucmotorwerks.com
------------------------------
Date: Sat, 27 May 2006 00:33:30 -0500
From: "Paul Garnier" <[EMAIL PROTECTED]>
To: "'Robert Blakeney'" <[EMAIL PROTECTED]>,
<[email protected]>
Subject: Re: E34 M30 Overheating
Message-ID: <[EMAIL PROTECTED]>
Fan clutch, aux fan, aux fan temp sensor/switch, aux fan resistor, aux fan
relay, aux fan connector, cracked head/leaking head gasket/warped head.
Try the fan clutch, and aux fan stuff 1st...
Paul A. Garnier
Houston, TX
281-827-0725
www.fastnetworking.com
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Robert Blakeney
Sent: Friday, May 26, 2006 4:00 PM
To: [email protected]
Subject: [UUC] E34 M30 Overheating
I've reached my total level of incompetence with my 1990 535iA cooling
system. The radiator is new (which started this effort) along with the
thermostat, expansion tank cap, viscous fan clutch, and upper radiator hose.
System has been flushed very well, pressure tested by MPH in Houston and
found to hold pressure and be in good shape. Water pump has about 25k on it.
Aux fan is working properly with a new radiator sensor switch. Small return
hose to expansion tank is clear. I've bled the system several times on flat
pavement and with the car on ramps.
It runs fine with the temp needle in the middle on the way to work, about 12
miles. I get in the car in the evening on the way home and the temp gauge
starts a steady hike all the way to red as the engine heats up. turning on
the heater and revving the engine quickly brings it back down. As long as
the car is moving the temp will hold in the middle, but any stopping starts
the temp back up and I have to hit the heater again.
Could the impeller on the water pump be spinning on its shaft? Any thoughts,
suggestions?
I'm stumped.
Robert
1990 535i 160,000 miles
Search the ARCHIVES:http://www.mail-archive.com/[email protected]
__________________________________________________________________________
In memory of Michel Potheau - friend, enthusiast, founder of the BMW CCA.
UUC Motorwerks - BMW Performance Fine-tuning and home of the Ultimate
Short Shifter - accept no substitutes!
908-874-9092 . http://www.uucmotorwerks.com
------------------------------
End of [bmwuucdigest] digest(5 messages)
**********
