Whilst doing a service, I noticed a coolant leak on the small pipe leading to the thermostat housing. It seems that the plastic hose connection has split.

I looked up the part number for a new hose on JLR Classic Parts (my VIN is FA211xxx) which is LR034629, £14.86, but no longer available.

The supercession takes me finally to LR080118, which is out of stock of course, and the price is now £176.90.

Best I can find aftermarket is
https://www.advancedfactors.co.uk/lr080118-coolant-hose which is £27.30 - seems to good to be true!

I'm concerned about whether the LR080118 part will actually fit - although it is only the plastic coupling that I am planning to use, I'll keep the existing hoses. It's a lot of money for a little plastic part.

Any thoughts?

Chris.

 L405 - 4.4SDV8 Vogue
P38 - 4.6V8 HSE
Land Rover series IIA V8

Well I can answer my own question. I bought the pattern LR080118 hose. Unfortunately the hose is smaller so the fitting at the end is not a straight swap.
To complicate matters, LR080118 as a T piece and a third leg going off which the original hose didn't have.

Click image to enlarge

Click image to enlarge

Do away with the plastic push on fitting, the rubber hose slides straight onto the thermostat housing, I popped a boost hose on mine and in the process it smashed that connector. Free fix. Current
2017 Range Rover Sport SVR
2001 Porsche 911 Turbo
_____________________________________
Previous
2013 Range Rover Autobiography SDV8
2007 Range Rover Vogue SE TDV8
2002 Range Rover HSE TD6
+ Many other non LR products

I have a similar situation to what you had ChrisJC.

What size/diameter did you machine the plug to? Is everything still holding tight?

From what I can gather, the L405 4.4 has two variants for the cooling system - one with active warming for the transmission and one without. The one with active warming has a coolant flow control valve to which the extra pipe goes.

I wonder what the official LR solution is for those of us with the TDV8 without the flow control valve... do they also plug it? 2011 L322 Autobiography 4.4 TDV8

I have a drop or two of coolant in the exact same place. The replacement parts make no sense to me. On the JLR Classic parts it is not shown as the parts being superseded in the same way as other parts. It makes no sense to me that the replacement part has an extra pipe, when there's nothing to connect it to!

I think someone at JLR has been smoking something to come up with this supersession. I have access to the files and LR034629 supersedes to itself which is likely a mistake.

If I take LR080118 and work backwards the following part numbers supersede to it:

LR034643
LR034652
LR072668
LR074213

This may not help but if JLR really thinks a two-way hose should supersede to a three-way hose for additional cooling/heating, then something has gone wrong in the process, I would suggest. 2012 Vogue TDV8 in Aintree green over sand

Rereading this thread, and looking again at the pictures, that plastic part with the coolant on is a part of the hose assembly, correct? Because it does look like it might be part of the thermostat housing, but in fact the hose/housing coupling looks… strange.