1985 Defender 2.5 NA Diesel engine overheats going Uphill only - Defender Source
Defender Source  

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


Reply
 
Thread Tools
  #1  
Old April 7th, 2017, 09:03 PM
jofher007
Status: Offline
Fernando
1985 Defender 110
Member
 
Join Date: Jan 2017
Location: FONTANA California
Posts: 17
Question 1985 Defender 2.5 NA Diesel engine overheats going Uphill only

Hello everyone
I just wanted to say that I'm new to this site and also to say that
I'm a Proud owner of a 1985 Ex mod Defender 110 2.5 NA Diesel with 44,000 kilometers

And I joined this site in need of help & assistance on a Uphill engine overheating.


Parts already replaced & installed:
*Thermostat 72 degrees
*water pump
*hoses
*coolant
*temperature gauge
*expansion tank cap
*radiator removed / flushed & cleaned
*upper & lower radiator hoses show good sign of coolant pressure
* Viscous unit & fan where inspected and seem to be working properly

Today I took the Rover for a drive near home and little highway drive with a slightly up hill
and after driving for 25 min
I noticed the temperature to rise little by little
pulled over once I notice the needle gauge was getting close to the red/orange mark.

I left the engine run while inspection for leaks ( none found)
drove back home and temperature stayed pass 90 degrees...

I'm now thinking that I may have installed the thermostat incorrectly ...
but I do remember installing it facing Up position.

*Could Engine oil quality / brand can cause the temperature to rise ?

*Could the Oil cooler be the problem ?

*How about if I remove the new 72 degree Thermostat and let the engine run with out it?
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old April 8th, 2017, 05:00 AM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,226
Registry
It should be an 83 C thermostat. Do you have the right one in there? The correct thermostat is required because it closes the bypass flow.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #3  
Old April 8th, 2017, 08:52 AM
jofher007
Status: Offline
Fernando
1985 Defender 110
Member
 
Join Date: Jan 2017
Location: FONTANA California
Posts: 17
I did purchase a 82 degree thermostat and the engine got hotter faster than the 72 degree
and I know it doesn't make sense but its true.
With the 82 degree I could not drive more than a mile before the engine temperature gauge got so close to the Red/orange marked..

With the 72 degree thermostat it doesn't, the temperature it only start to rise only on uphills..
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old April 8th, 2017, 08:58 AM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,226
Registry
Sounds like it is the gauge. Check with an IR gun.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
  #5  
Old April 8th, 2017, 04:01 PM
jofher007
Status: Offline
Fernando
1985 Defender 110
Member
 
Join Date: Jan 2017
Location: FONTANA California
Posts: 17
Saturday Update..

Woke up early in the morning and :
*inspected Rover coolant level. OK
*check for leaks. None

*I let the engine warm up and went out for a drive around the city streets / highway
and temp stayed at 90 degrees on Dash after driving for over an hour and 1/2.

*Drove the same location as Friday with a slightly up hill . Temp show 90 degrees on dash

* I Stopped by to visit a friend ( retired BMW technician ) witch i haven't seen in a while and
He inspected my Rover with his Laser temperature gauge.
checked the heads temp , hoses & all around temp sensor and Final test results show a temp of No max than 80 degrees...

* checked Engine Oil Cooler Temp was Ok and good to touch without burning hand

This means that the Temp dash gauge or the New Temp sensor is not the right one or maybe not working properly ?
witch I just recently purchased from Paddock Spare & accessories..
Reply With Quote
  #6  
Old April 8th, 2017, 04:40 PM
Red90's Avatar
Red90
Status: Offline
John B.
1991 Defender 90, 200TDI
Site Team
 
Join Date: Sep 2003
Location: Calgary
Posts: 9,226
Registry
Buy a VDO vision gauge and sender. Much better and not expensive.
__________________
Pissing people off on the "net" since 1983.

Land Rover. Turning owners into mechanics since 1948.
Reply With Quote
Reply

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

Tags
1985, defender, diesel, engine

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
Coolant Flow Path 2.5 NA Diesel edh Defender Technical Discussions 10 September 14th, 2013 08:22 AM
is 2.5 NA an non-interference engine? killahaas Defender Technical Discussions 6 September 9th, 2011 09:16 PM
1985 LHD D90, Black, 2.5 N/A Diesel rivermike For Sale - Vehicles 0 September 7th, 2011 04:46 PM
Looking for 2.5 NA Diesel or 200tdi LRover Wanted 8 January 16th, 2011 01:27 AM
Defender 90 diesel engine and Electronics? x0054 Defender Technical Discussions 1 July 30th, 2005 10:43 PM


All times are GMT -5. The time now is 12:44 PM.


Copyright