I am a newer member here on Discoweb and I want to thank all of you who have posted on this thread. I am a former 1992 Range Rover Classic 3.9 V8 Owner that I sold with 200k miles. I currently own a 1988 RRC 3.5 V8 w/ 150k and a 2003 Discovery II SE w/ 57k. The Discovery is my daily driver and I recently purchased it. I made sure the VIN # was outside of the VIN range for the failed oil pumps before I purchased. It is in great shape, I have had all fluids changed and have already put 4k miles on it. The one major thing I noticed after a few weeks of ownership was the ill managed engine temperature compared to Land Rover models of years past. For example, today, I was on my 6 mile commute in semi-heavy traffic (nothing above 30mph and stop and go), it was 60*F outside (I live in Denver), and about 4-5 miles into my commute (15-20 min.) the auxilliary fan popped on. My A/C was not on. I even experimented this morning by revving the engine a few times with the Viscous Fan engaged and the Auxilliary fan then turned off, but turned back on about 3 minutes later. All of this without the A/C on. My Rover mechanic and I have checked everything... Viscous Fan is operable, Aux fan operable, T-Stat is operable, New Coolant, no leaks, Head Gasket OK etc. My gauge in the truck does not move from the middle, but I know this engine is running too hot or too hot for my comfort level anyway. After reading all of these posts and others, I have learned more about the operation of the Aux fan in the 2003 DII (82*F and under 50mph or 212*) and the fact that many others are struggling with engine temps on the DII. I just purchased a scanguage and ordered all of the parts for the in-line T-Stat modification some have done here. I will post my pre and post modification temps and results. I do have a couple of questions...
I know that people have used a Chevy 350 V8 Tstat for the modification with a 1/8th inch hole drilled. Do any of you have a part number for the Tstat with a part number for the appropriate gasket that fit into the Mezziere Tstat housing to prevent any leaks? Thanks again for all of your help with this issue on the DII.
Thanks again,
Rob