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2004_TD5_NZ

Member Since: 13 Dec 2020
Location: Auckland
Posts: 10

2004 Defender 110 Td5 SW Santorini Black

TD5 COOLING SYSTEM DRAIN / FILL

OK so I know there are a few different topics on this but I'm just hoping for some clarification on the steps outlined in the workshop manual. This may also help a few other people as I've read a number of other posts mentioning that you need to remove alternator to drain coolant from cylinder block (often 5-6 litres remain in there). The manual says you only need to open the drain plug on coolant feed pipe to get it.

1.) Can someone please confirm air inlet hose referred to is (4) (connects to intercooler and manifold)?

2.) The drain screw is noted as (20) - also referred to in diagram as drain plug?

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15th Jun 2023 3:33am

NickMc

Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1645

Some have a soft pipe and some have a solid pipe with the drain plug that goes along the bottom of the fan cowling. Just remove this bung to drain the system.

You can get at the bottom radiator hose but it’s fiddly if you remove the back top fan cowling (four screws)

I wouldn’t bother stripping the alternator etc out to drain its madness. Worth noting it’ll drain out quicker once you remove the expansion cap so be careful with your bucket

Why do you want to take the inter cooler hose off?

15th Jun 2023 4:25pm

2004_TD5_NZ

Member Since: 13 Dec 2020
Location: Auckland
Posts: 10

Hi Nick, thanks for response. I'm following the procedure in workshop manual - step 6 I have highlighted there states to remove hose from intercooler. I also can't really figure out why that needs to come off??

15th Jun 2023 7:46pm

NickMc

Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1645

Ignore it. There’s normally a bleed valve in the top hose and in the fuel cooler line, best advice is to look at the condition of the top bleed screw before you start this, part of my spares inventory for them.

I’ve done them for years draining the bottom hose bung or removing the bottom radiator hose, I do have the proper tool for the spring clips though.

Try not to get coolant on your belt when bleeding the system as it’ll squeal after.

Last edited by NickMc on 15th Jun 2023 8:08pm. Edited 1 time in total

15th Jun 2023 8:02pm

2004_TD5_NZ

Member Since: 13 Dec 2020
Location: Auckland
Posts: 10

OK cheers, top bleed screw has been replaced at some stage with an anodised aluminium one. Looks good.

15th Jun 2023 8:07pm

NickMc

Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1645

No problems, not too hard a job, just make sure you get it up to temp and bleed the air out at both bleeders, a few squeezes of the top hose normally helps. No harm in cleaning the hose at the head on the top too as they’re a bad spot for corrosion and leaks while it’s drained.

15th Jun 2023 8:11pm

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