over heating when idling - Defender Source
Defender Source  

Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Join the Defender Source Community Today
Reply
 
Thread Tools
  #1  
Old August 15th, 2016, 02:43 PM
Defender_90
Status: Offline
Kevin Doonan
1999 RR HSE
Member
 
Join Date: Jan 2012
Location: Stamford, CT
Posts: 38
over heating when idling

Hi All,

'94 defender 90 is overheating when idling.

Pretty sure this has to do with the water pump coming to terms with its age.

Bit just wanted to confirm that it would be possible for the pump to circulate coolant while driving, thus not overheating, but when idling (lower RPM), the pump does not have sufficient power to circulate the coolant.

side note; engine thermo in the red on the dash, panis sets in, pull resi cap off........all can imagine what happend next.

Thanks in advance!

Kevin
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old August 15th, 2016, 02:48 PM
rxcrwlr
Status: Offline
Rover Dude
None
Member
 
Join Date: Oct 2009
Location: USA
Posts: 8
looks like a bad fan clutch
Reply With Quote
Sponsored Links
Advertisement
 
  #3  
Old August 15th, 2016, 02:51 PM
sflash868's Avatar
sflash868
Status: Offline
Stephan Laputka
1995 D-90 SW
Member
 
Join Date: Jan 2004
Location: San Francisco, CA
Posts: 920
x2 on the fan clutch. Typically when the water pump starts to go, it will start to leak by design to let you know. Replace the fan clutch and see if that does it.
__________________
Land Rovers are by far the best looking 4x4 on the back of a flatbed...
Reply With Quote
  #4  
Old August 15th, 2016, 03:17 PM
Davis's Avatar
Davis
Status: Offline
Chris Davis
94 D90, 88 RRC
Member
 
Join Date: Nov 2003
Location: Colorado
Posts: 2,127
X3 on fan clutch.
Reply With Quote
  #5  
Old August 15th, 2016, 04:15 PM
Defender_90
Status: Offline
Kevin Doonan
1999 RR HSE
Member
 
Join Date: Jan 2012
Location: Stamford, CT
Posts: 38
Thanks team for the quick response, I am going to try and get that sorted this week.

Hopefully that does the trick.

Any suggestions on $139 version versus the $300+?
Reply With Quote
  #6  
Old August 15th, 2016, 04:20 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 8,157
Registry
Test it first.... When too hot, pull over. Are both the hoses in and out of the radiator HOT? If so, check the fan.

Carefully take a rolled up newspaper and try to stop the fan. If it stops the viscous unit is dead.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #7  
Old August 15th, 2016, 04:20 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 8,157
Registry
Test it first.... When too hot, pull over. Are both the hoses in and out of the radiator HOT? If so, check the fan.

Carefully take a rolled up newspaper and try to stop the fan. If it stops the viscous unit is dead.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #8  
Old August 15th, 2016, 04:36 PM
Uncle Douglas's Avatar
Uncle Douglas
Status: Offline
Doug Crowther
A defender in every driveway-motto
D-90 Source Vendor
 
Join Date: Dec 2007
Location: Gods Country- Central Virginia
Posts: 11,333
Registry
If its your fan clutch, I've run one of these on my 4.2 for a couple years now and its worked well.
1987-1995 Land Rover Range Rover Fan Clutch - Cooling System - Hayden 87-95 Range Rover Fan Clutch - 285-05154125 - PartsGeek

It will thread right onto the defender v8 waterpump.

For the difference in price you could likely switch to the classic fan as well if necessary.
__________________
Good judgement comes from experience,experience comes from bad judgement.

Dividing Creek Imports
Worldwide Land Rover Shipment and Importation Service
Bespoke Restoration & Modification work


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

410.693.1391


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
Sponsored Links
Advertisement
 
Reply

Lower Navigation
Go Back   Defender Source > Defender & Series Technical Discussions > Defender Technical Discussions

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Over heating issues... Fan recommendation please Davis Defender Technical Discussions 3 August 7th, 2012 01:16 AM
Engine dies while idling Coug D90 Defender Technical Discussions 2 December 4th, 2010 01:36 PM
CEL light when idling rlynch356 Defender Technical Discussions 7 May 14th, 2010 12:59 PM
Over heating issues on new 4.6 build anthony Defender Technical Discussions 7 August 1st, 2007 02:32 AM
over heating Big D Defender Technical Discussions 4 January 5th, 2007 04:14 PM


All times are GMT -5. The time now is 03:29 PM.


Copyright