CoopLR3
Member Since: 21 May 2018
Location: Adirondacks
Posts: 38
  
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| Tranny cooler lines... any tips for replacement? |
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My NA LR3 V8 transmission cooler lines are badly rusted and wet with tranny fluid along half their length. I'm looking for a good write up to replace them. Do I need to drain the transmission? etc... It appears I can pull them rearward from below, but might have to move the driveshaft. Any input is welcome!
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 9th Jun 2018 11:48 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10359
  
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I don't think drain is required.
you will probably loose half a litre though.
have a container ready to catch
there are one of 2 guides on here, so do a search.
think i posted in one of them
there is a fun bolt by the air con compressor. Requires a universal joint to undo
https://www.disco3.co.uk/forum/gearbox-oil...56149.html
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| 10th Jun 2018 9:28 am |
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200TDi
Member Since: 30 Dec 2012
Location: Annan/Portsmouth
Posts: 282
 
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as Pete said you will loose a bit - at the very least whatever is in the pipes and maybe the cooler (not sure if inlet/outlet is at the bottom) so you need to make sure the plug is removable and that you know how to put more fluid in and that you have some new as stuff you catch will be contaminated. 
Of course you could use the opportunity to do a partial fluid change if desired? Pete
1965 S2a with Galv Marslands Chassis - Sold (BIG mistake)
1993 200TDi GS Green 5 Seat Manual - Broken
1993 200TDi GS Grey 7 Seat manual - Sold To Defender Owner to Use Engine
1999 TD5 GS Blenheim Silver 5 Seat Manual - Broken
1999 TD5 GS Oxford Blue 7 Seat Auto - Sold
1999 TD5 ES Epsom Green 6 Seat Auto - Sold
2007 D3 2.7 TDV6 XS Java Black 7 Seat Auto
1999 Swift Classic Coronette
2019 BMW X1 AWD Auto - SWMBO's Car
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| 10th Jun 2018 9:39 am |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10359
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this does NOT use red fluid.
fluid needs to be for 6HP26
refill though the level check hole (not after driving)
pain on the V8 due to exhaust
loosen level plug but don't remove!!!!
start engine
now it is safe to remove the plug
refill until there is a small trickel of fluid.
refit plug tight
turn engine off
or just put back in a similar amount that was drained
DO NOT HAVE THE PLUG OUT WHILE THE ENGINE IS OFF, ELSE YOU WILL LOOSE A LOT OF FLUID
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| 10th Jun 2018 10:01 am |
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CoopLR3
Member Since: 21 May 2018
Location: Adirondacks
Posts: 38
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Thanks everyone! That's just the info I needed! I did the metal pan swap to fix a leaky Mech Sleeve, in the process I found the cooler lines in poor shape and leaking too. I have 1/2 litre of LR fluid left over from the pan swap, but I'll order another just in case. I'll be ordering parts today. I assume the o-rings will come with the pipes.
The bottom pipe flows from the tranny, top pipe is the return. I wonder if it's better to first disconnect at the tranny or at the radiator...?
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| 10th Jun 2018 2:59 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10359
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As said. It's a good idea to disconnect the top rad pipe
And leave for an hour. +
At least some of the fluid will drain back even if only 1 pipe.
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| 10th Jun 2018 7:13 pm |
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CoopLR3
Member Since: 21 May 2018
Location: Adirondacks
Posts: 38
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I have the old cooler lines disconnected and drained. Looks like I may have to remove the front driveshaft to pull them out...I'd rather not go thru all that. Does anyone know of another method? Has anyone pulled them from the front or from above?
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| 14th Jun 2018 10:50 pm |
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CoopLR3
Member Since: 21 May 2018
Location: Adirondacks
Posts: 38
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Success! Thanks for the tips everyone. I managed without disconnecting the driveshaft. Putting the rest back together this weekend and working on a write up. One of the pipes had a pinhole (blew air thru it). I'll mention your contributions.
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| 23rd Jun 2018 12:38 am |
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