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nickhodgson



Member Since: 08 Dec 2009
Location: Zambia
Posts: 172
Running Hot 50th Anniversary
I have a 50th Anniversary V8i that I believe has issues. It starts (hot and cold) fine and runs relatively smoothly. I have an OBD Scanner installed and it will show engine temperature of over 100 Degrees when I am in traffic. It has a new radiator, new thermostat x2 (88 degree and 74 degree), new viscous x2, new water pump. The temperature gauge has not gone over half way but the over 100 degree numbers from the OBD are alarming. If it gets to 105 I either park or find an open road. On the open road the temp comes down easily.

Any ideas what to check next?

Another issue is that the OBD has an engine load parameter that I can't seem to get to show over 70%. It does not seems as powerful as my 3.9 V8i Disco. Is this normal as my Puma Defender would go to 100% when I used full throttle.



Click image to enlarge 1995 300tdi Defender 90 P/UP
2011 Puma Defender 130 D/C
2000 300tdi Defender 110 P/UP
2015 Discovery 4 SDV6 HSE
Post #579847 23rd Nov 2016 1:41pm
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100inch



Member Since: 15 May 2012
Location: Brunswick
Posts: 407
Australia 2010 Defender 110 Puma 2.4 CSW Santorini Black
Park the car uphill and open the radiator cap would be my first step. See if you have any air pockets in the inlet manifold or heater matrix. m
Post #580387 25th Nov 2016 1:43pm
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nickhodgson



Member Since: 08 Dec 2009
Location: Zambia
Posts: 172
Parked the car nose uphill. Removed the radiator cap and nothing really happened. Turned on the heater and lots of hot air came out - so I believe water was circulating into the heater matrix.

Any other ideas?

Do you think a work camshaft could make the engine run hot? I don't really see how........ 1995 300tdi Defender 90 P/UP
2011 Puma Defender 130 D/C
2000 300tdi Defender 110 P/UP
2015 Discovery 4 SDV6 HSE
Post #582084 2nd Dec 2016 10:20am
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Ads90



Member Since: 16 Jun 2008
Location: Cots-on-the-Wolds
Posts: 800
United Kingdom 2007 Defender 90 Puma 2.4 CSW Keswick Green
I thought normal operating temperature was around 90 to 100deg?
In which case 100deg in traffic would not be anything to worry about?

With correct antifreeze mix, and pressure, the water should not boil until reaching around 130deg.
When releasing the cap, and also then the pressure, it may boil - so take care.

My 4.0i 50th was completely gutless in standard tune - coupled with standard gearing through the slush 'box I think this is normal.
The 3.9 disco, and TDCI defender feel much more powerful.
Post #582112 2nd Dec 2016 12:02pm
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100inch



Member Since: 15 May 2012
Location: Brunswick
Posts: 407
Australia 2010 Defender 110 Puma 2.4 CSW Santorini Black
Sorry, I didn't made myself very clear, but was the water level really high up? If not fill it right up (whilst uphill). The cam shouldn't made a difference but my water pump failed at 60k's and I replaced the radiator on my 50th as it was shoot. Maybe worth a flush/ test. m
Post #582113 2nd Dec 2016 12:04pm
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