cookie64 Posted February 15, 2010 Share Posted February 15, 2010 HI everyone i was wondering if my 300tdi would work fully underwater and for how long? when i say underwater the deepest it would need to go would be 45m Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 15, 2010 Share Posted February 15, 2010 45m deep? Errr, no, the seals would give up at that pressure Quote Link to comment Share on other sites More sharing options...
Retroanaconda Posted February 15, 2010 Share Posted February 15, 2010 Considering the water pressure at 45m would be around 4.5 bar, I think the oil seals would soon give up and let water into the engine pretty sharpish. This is of course assuming you were able to overcome the multitude of other issues, I can imagine the exhaust back-pressure would be somewhat restrictive for example. Can I ask why? Quote Link to comment Share on other sites More sharing options...
sgnas Posted February 15, 2010 Share Posted February 15, 2010 As the water pressure at 45m is something in the region of 5-6bar I would guess it's only use at that depth would be as an anchor. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted February 15, 2010 Share Posted February 15, 2010 It'll work as the TDi's true calling as a boat anchor Quote Link to comment Share on other sites More sharing options...
zim Posted February 15, 2010 Share Posted February 15, 2010 our rig only stands in about 30m of water in the southern north sea i guess you're meaning 45cm ? if so, you'll be ok. G Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted February 15, 2010 Share Posted February 15, 2010 i guess you're meaning 45cm ? if so, you'll be ok. Awe, you spoilt it now! Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted February 15, 2010 Share Posted February 15, 2010 If you only mean 45cm then surely that's written in the owner's manual Quote Link to comment Share on other sites More sharing options...
Somethingwitty Posted February 15, 2010 Share Posted February 15, 2010 Give a Diesel air and fuel and it should run fine... provided water is not ingested as well. Longer term concerns are water finding its way into the oil (and not just engine - gearbox, axles etc) and electrics (corrosion) and things like alternator bearings - should all continue to function but may/will decrease life of the various bits. A look at a waterproofed Wolf is very instructive - you would not believe how much is waterproofed / provided with breathers or even pressurised by a line from the turbo boost sense line (front cover)! They also disconnect the alternator and spend a significant time preparing in other ways. Partly this effort is to enable salt water fording up to head height and partly to ensure good condition long term. They are also rigorously waxoiled. Bottom line for us, fit wading plugs, don't flood it and keep it running when the exhaust is submerged... it will work fine, however there will be a greater burden on the wallet in the long term in many areas depending on what is submerged for how long and what you do directly after (eg leave contaminated oil in an axle for six months!) Quote Link to comment Share on other sites More sharing options...
cookie64 Posted February 21, 2010 Author Share Posted February 21, 2010 i was thinking 45m i was wondering if it would have been possible to drive across to france, i.e drive in the water not the tunnel shallowest point is 45m which also happens to be the shortest point at 21miles lol Quote Link to comment Share on other sites More sharing options...
outdoor_ian Posted February 21, 2010 Share Posted February 21, 2010 Just thinking of the air intake made me Quote Link to comment Share on other sites More sharing options...
rope runner Posted February 21, 2010 Share Posted February 21, 2010 Might need some extra lighting at that depth , perhaps some flood lights Quote Link to comment Share on other sites More sharing options...
petethepilot Posted February 21, 2010 Share Posted February 21, 2010 The relative pressure is 5,5 Bar, which is not that bad considering the counterpressure inside the engine, which would be what at high revs? 3-5 Bar depending on the engine? So it could be possible to run if it could get the air for the combustion from the tank. It would be impossible to get that amount of air from the pumps from the surface, and engines own suction is not sufficient to grasp air even only few meters deep. I think the exchaust back pressure makes it impossible to run, if you can´t solve that problem with some kind of a surface mounted suction... Also considering the depht it would be impossible for a diver to stay that long submerged. Firstly the source of air must come from the surface, otherwise you will die of decompression sicness in no time...and few other minor things. But apart of that, very interesting idea indeed! Quote Link to comment Share on other sites More sharing options...
Tazz070299 Posted February 21, 2010 Share Posted February 21, 2010 I'd be more worried about water ingress into the cabin Tazz Quote Link to comment Share on other sites More sharing options...
landmannnn Posted February 21, 2010 Share Posted February 21, 2010 i was thinking 45m i was wondering if it would have been possible to drive across to france, i.e drive in the water not the tunnel shallowest point is 45m which also happens to be the shortest point at 21miles lol The ferry is a much cheaper option, it will also stop your euros getting wet. Quote Link to comment Share on other sites More sharing options...
landroversforever Posted February 21, 2010 Share Posted February 21, 2010 Some of my friends think us LR owners(+ wannabes) are mad... but that takes it to a new level Quote Link to comment Share on other sites More sharing options...
bishbosh Posted February 21, 2010 Share Posted February 21, 2010 Some of my friends think us LR owners(+ wannabes) are mad... but that takes it to a new level Surely that should be "new depths" Ross...???? Quote Link to comment Share on other sites More sharing options...
shauniedawn Posted February 21, 2010 Share Posted February 21, 2010 Guess you'd have to seal the fuel tank. Would you dispense with the radiator? Would you need to fill the tyres with water to help improve traction? I think you should write to Top Gear with this one - you could challenge them to a race Shaun Quote Link to comment Share on other sites More sharing options...
landroversforever Posted February 21, 2010 Share Posted February 21, 2010 Surely that should be "new depths" Ross...???? Quote Link to comment Share on other sites More sharing options...
cookie64 Posted February 23, 2010 Author Share Posted February 23, 2010 lol what a great response some of the posts r hilarious its only past 50m that things start getting complicted for a diver ive dived at 45m many times i would also worry about the water ingress it might knock out my sterio and a dnt think filling the tyres with water would help ideally tracks would be needed which are 3k per wheel Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted February 23, 2010 Share Posted February 23, 2010 I don't think you'd get any wetter than driving a standard LR on a rainy day and the vehicle would pretty much be scrap after being dunked in salt water as you'd never get it all out, unless you then went and drove round the bottom of a freshwater lake for a bit afterwards Why not do a clarkson and float it across, LR have done this themselves more than once. Quote Link to comment Share on other sites More sharing options...
JST Posted February 23, 2010 Share Posted February 23, 2010 They are also rigorously waxoiled. they are????? ours never were. WWTUM(HS) ones too, neither were the TUM (HD)s Quote Link to comment Share on other sites More sharing options...
errol209 Posted February 23, 2010 Share Posted February 23, 2010 You could miss out the engine / fuel issues by using a sealed electric drive, and the batteries will help keep the traction levels up: but does the world make an "underwater" offroad tyre As to salt water in the chassis, just fill it with crazy foam * Positive pressure gearbox and axle breathers sound fun though! * Yes I know that'd be bouyant, but we aren't in "normal space" here, are we? Quote Link to comment Share on other sites More sharing options...
tacr2man Posted April 25, 2013 Share Posted April 25, 2013 I would think depth is irrelevant from an intake and exhaust point of view as depth is a relative term , if you were in danakil depression you would be at upto 100mtrs bel;ow sea level and you would be surpised if your diesel engine would not work . The engine seals as previously mentioned would be the limiting factor example here http://www.youtube.com/watch?v=qRBGr39uJBo if your interested another Niva worth trying with a 80" ? Quote Link to comment Share on other sites More sharing options...
Oakmaster Posted April 25, 2013 Share Posted April 25, 2013 By far the best idea is to send it to Top Gear Quote Link to comment Share on other sites More sharing options...
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