cackshifter Posted July 28, 2021 Share Posted July 28, 2021 Hi, the oil thermostat seems to be ERC5923, but the workshop manual shows a spring and 2 washers with it for which I can find no part numbers. They don't seem to exists in the parts catalogue. All the pictures of ER5923 just show the wax cartridge, except Turners who show a cartridge, spring and one washer. Any ideas? Are these included in ERC5923? Thanks Nigel Quote Link to comment Share on other sites More sharing options...
cackshifter Posted July 28, 2021 Author Share Posted July 28, 2021 Looks like 200tdi has just one washer according to RR Classic WSM. Quote Link to comment Share on other sites More sharing options...
western Posted July 28, 2021 Share Posted July 28, 2021 ERC5923 is just the bulb thermostat, parts book only shows that, no mention of a spring or washer[s] my 200tdi has the same stat with the spring & 1 washer. putting the part number in Brit-car website just shows the bulb thermostat [click on part number to see it] ERC5923 I can't find that part on the 300Tdi engine parts pages on Turners website. BUT its in the 200Tdi engine parts pages ----- https://www.brit-car.co.uk/search.php?query=ERC5923&xBrand=&part_type=&xSupplierID=&product-sort=&xPerPage=10 Showings as OUT OF STOCK I have a couple of spare used ones here if it helps, happy to post a set. I can't see a need for 2 washers on it, its only opens when the oil is hot enough to be diverted to the oil cooler in the radiator right hand side tank. Quote Link to comment Share on other sites More sharing options...
cackshifter Posted July 29, 2021 Author Share Posted July 29, 2021 Hi, Thanks Ralph, it is a bit of a conundrum, and thank you for the kind offer. At this point I don't need spares thanks, but the motivation was I think the O ring might be leaking slightly, so I thought while it is apart maybe I would replace the insides, after all the coolant thermostat seems to have a finite life so maybe this does, and I wasn't sure whether it was actually working, no easy way to find out. Then I looked in the WSM & parts manual and thought strange! Since posting this I have watched the Brittanica Restorations video on it, and I can see I can test the cartridge quite easily, and I don't suppose the spring and washers will be any the worse, I'll probably get a new cartridge anyway for what it costs. 1 Quote Link to comment Share on other sites More sharing options...
Hawklord Posted August 1, 2021 Share Posted August 1, 2021 Part numbers are: Thermostat: ERC5923 O Ring: ERC5913 Spring: ERC3727 Washer: ERC3725 1 Quote Link to comment Share on other sites More sharing options...
western Posted August 1, 2021 Share Posted August 1, 2021 Where did you find those numbers? Quote Link to comment Share on other sites More sharing options...
Hawklord Posted August 1, 2021 Share Posted August 1, 2021 (edited) Hi Ralph I ordered these parts only yesterday and found the part numbers somewhere on the internet but it wasn't easy and can't find where at the moment but will post if I can. Found it https://www.lrworkshop.com/diagrams/land-rover-defender-engine/300tdi/oil-filter_53190 Edited August 1, 2021 by Hawklord Quote Link to comment Share on other sites More sharing options...
western Posted August 1, 2021 Share Posted August 1, 2021 Well done a good find just for extra info the spring/washer/thermostat are common to all the 5main bearing 2.5 petrol & diesel engines if the have a oil cooler in radiator. Quote Link to comment Share on other sites More sharing options...
cackshifter Posted August 1, 2021 Author Share Posted August 1, 2021 Yes well done indeed. Many thanks Quote Link to comment Share on other sites More sharing options...
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