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changed thermostat and pump, car overheating, need help.
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 4177

England 2005 Discovery 3 TDV6 HSE Auto Baltic BlueDiscovery 3

+1 Thumbs Up
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #15587089th Nov 2015 5:03 pm
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Landthree
 


Member Since: 22 May 2015
Location: California
Posts: 27

United States 

How do I deal with the air lock heater?

Also I am suspecting a blown gasket or engine block breach. Too
many bubbles and my guess is that as the temp of the motor rises and contributes hot gases in to the coolant lines, it raisess the coolant temperatures.
  
Post #15587169th Nov 2015 5:08 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 4177

England 2005 Discovery 3 TDV6 HSE Auto Baltic BlueDiscovery 3

Or warped and or cracked cyl. heads Big Cry if this is the case run it as little as possible, the hot gases blowing through the breach work like an acetaline torch and will very quickly cut an irepairable hole through the metal, I have seen this on many occasions(not on D3's).
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #15587229th Nov 2015 5:20 pm
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Landthree
 


Member Since: 22 May 2015
Location: California
Posts: 27

United States 

There is definitely air in the system. after inspecting and trying to refill the and bleed the reservoir, I am now leaning towards not having a bleeder valve on the engine hose (picture below). My top hose does not have a bleeder. There is no way to bleed the air out of the engine without the below bleeder valve.

I flushed the whole system and measure the coolant put back. I am short 1 gallon and my guess is I have about 1 gallon of compressed air in the system.

  
Post #155898910th Nov 2015 8:27 am
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 4177

England 2005 Discovery 3 TDV6 HSE Auto Baltic BlueDiscovery 3

Cooling System Draining, Filling and Bleeding (26.10.01) Published : Jul 6, 2004
5 .Remove the coolant expansion tank cap.
9 .Release the clip and disconnect the radiator lower hose, allow the coolant to drain.
11 . Connect and secure the radiator lower hose.
14 . Loosen the coolant expansion tank bleed screw.
CAUTION: Engine coolant will damage the paint finished surfaces. If spilt, immediately remove the
coolant and clean the area with water.
15 . Fill the cooling system to the upper level mark of the expansion tank.
16 . Start and run the engine.
17 . Fill the cooling system, keeping coolant to the upper level mark of the expansion tank until a steady stream of coolant is seen returning to the expansion tank. Tighten the bleed screw.
18 . Install the coolant expansion tank cap.
19 . Run the engine until the thermostat opens.
20 . Check the heater for correct operation.
21 . Switch the engine off and allow to cool.
22 . Install the engine cover.
23 . Clean any remaining coolant from the chassis and surrounding area.
24 . Install the radiator access panel.
25 . Install the front LH splash shield.
26 . NOTE :
Hold the engine speed at 2,500 RPM for 30 seconds.
Return the engine to idle for 30 seconds.
Repeat the above procedure a further four times.
Tighten the 4 bolts to 10 Nm (7 lb.ft).
When the cooling system is warm, the coolant will be approximately 30mm above the upper level mark on the
expansion tank with the cap fitted.
 It can when others can't,
It will when others won't,
It goes where others don't. 


Last edited by M3DPO on 10th Nov 2015 11:25 am. Edited 2 times in total 
Post #155903610th Nov 2015 10:51 am
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 4177

England 2005 Discovery 3 TDV6 HSE Auto Baltic BlueDiscovery 3

Double post thanks to Windows 10 Mr. Green
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #155904710th Nov 2015 11:18 am
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Landthree
 


Member Since: 22 May 2015
Location: California
Posts: 27

United States 

went to local auto shop and had them flush and add coolant.

Heater pipes are now hot and after a quick bleed, no more bubbles.

STILL OVERHEATING Big Cry

temperature rises and then a click then coolant flushes and then temperature gauge drops, it keeps over heating then drops, stabilize for a few minutes then rises again.

Apparently no leaks. pressure is good.

no white smoke from exhaust.
  
Post #155934110th Nov 2015 8:01 pm
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SHARKYSHARKS
 


Member Since: 20 Dec 2008
Location: Saddleworth Oldham
Posts: 1863

England 2010 Discovery 4 3.0 TDV6 GS Auto Buckingham BlueDiscovery 4

Can you run it without the thermostat to eliminate the fault ??
 44 Tonne 12 Litre 6x2 Scania T cab (Current)
Freelander 1 (Current)
Ex D1
Ex D2 GS
Ex V8 D2 GS
Ex D3 S

Club skip ya lockers !!!
Club BAS remote heater !!
Club Duratrac
Club Phillips DRL
Club Prospeed Rack Mk 1
Club Prospeed Rack Mk 2
Club Sankey
Club RLD spare wheel protector
 
 
Post #155935210th Nov 2015 8:14 pm
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M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 4177

England 2005 Discovery 3 TDV6 HSE Auto Baltic BlueDiscovery 3

Have you changed the thermostat? -Try taking it out. On the TDv6 the temperature gauge is controlled by two sensors, water and oil, a failing oil sensor has been known to make strange things happen.
 It can when others can't,
It will when others won't,
It goes where others don't. 
 
Post #155935610th Nov 2015 8:16 pm
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Landthree
 


Member Since: 22 May 2015
Location: California
Posts: 27

United States 

I did remove the thermostat and ran the car and it overheated, but that was before when there was less coolant inside. Will probably try again.

Thermostat and housing is completely new, doesn't mean it works. I guess I can do the hot water test.

After returning home to a cold engine I notice all the reserve coolant had drained in to system. so I added about 1 liter of additional coolant to top it off.

I still don't understand why my heater is not working. Big Cry
  
Post #155947511th Nov 2015 2:47 am
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Landthree
 


Member Since: 22 May 2015
Location: California
Posts: 27

United States 

interesting revelation .....

LOWER hose return from heater is cold UPPER hose is hot.

from the LOWER coolant return line, everything from there is cold.

How can this be I flushed both lines, reverse flush and it was fine.

Either an airlock or clogged heater

My worst fear Big Cry blown gasket emitting hot gases in to the coolant line creating airlock Big Cry
  
Post #155947811th Nov 2015 3:35 am
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timmos
 


Member Since: 01 May 2017
Location: burton on trent
Posts: 2


did you ever figure this out?
  
Post #18751782nd Nov 2017 9:38 pm
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