Discovery II TD5 coolant 'stat

thebiglad · Dec 26, 2009

Hi all, if anyone needs to know, this is how you find and change the 'stat on a TD5:

1. Remove the plastic viscous fan cover by releasing the 4 retaining screws;

2. Remove the viscous fan using a 36mm cranked spanner unscrewing in an anti-clockwise direction (RH thread). I found I needed to give it a tap with a lump hammer just to free it off;

3. You will now have good access as per the attached picture, to remove/replace the thermostat.

Headtester · Dec 28, 2009

How did you release the spring pipe clips on the coolant hoses without spending an hour mashing your knuckles before resorting to a dremmel to cut the clips? [Not that I did that of course, just asking hypothetically

]

thebiglad · Dec 28, 2009

Headtester said:
How did you release the spring pipe clips on the coolant hoses without spending an hour mashing your knuckles before resorting to a dremmel to cut the clips? [Not that I did that of course, just asking hypothetically ]

I used pliers on the smaller one and grips on the larger ones, squeeze the lugs together and wriggle them down the pipes.

Pull the pipes off, pull the existing clips off and replace with std screw-type clips.

Headtester · Dec 28, 2009

Cheers Biglad - I did the same but it took ages. I've replaced the spring clips with screw type ones too.

taz3355 · Dec 16, 2010

Does the thermostat come complete in housing or just thermo as this is what has been supplied by unipart. As if I remove housing etc & find this is wrong I'm not going to be a happy chap:

thebiglad · Dec 16, 2010

taz3355 said:
Does the thermostat come complete in housing or just thermo as this is what has been supplied by unipart. As if I remove housing etc & find this is wrong I'm not going to be a happy chap:

The thermostat on a TD5 is the white-ish looking thing in the picture - it comes as a complete entity.

Dave

sierrafery · Dec 16, 2010

taz3355 said:
Does the thermostat come complete in housing or just thermo as this is what has been supplied by unipart. As if I remove housing etc & find this is wrong I'm not going to be a happy chap:

here's a better view of it PEM100990 THERMOSTAT & HOUSING ASSY | shop | www.lrseries.com | L. R. Series

MTurri · Dec 16, 2010

This is what you use to easily work with spring loaded hose clips:

e.g. [ame="http://www.amazon.co.uk/Draper-89793-REMOTE-HOSE-PLIER/dp/B000PJ8GXO/ref=sr_1_2?ie=UTF8&qid=1292537103&sr=8-2"]this one[/ame]

xat44 · Dec 17, 2010

i love seeing these specialist tools for awkward jobs.
as a diy`er mechanic though, i`ll stick to pliers and curseing

MTurri · Dec 17, 2010

Yes xat44... generally share your view, no point in getting the sporty tool, I'm no pro, this is a one time thing, and so on... but having to contend with these clips turned into a regular chore, and eventually the cursing, bruising, picking up tools from the floor & all around wasting time & patience stopped being amusing.

Cheers

Matt

thebiglad · Dec 17, 2010

I must say that I didn't have too much of a problem with those spring clips in fact whilst working on a mates TD5 I began to actually like them.

I used an adjustable pipe spanner like this:

Irwin Adjustable Vise Grip GrooveLock 6"150mm Brand New on eBay (end time 18-Dec-10 19:18:59 GMT)

and found it to be the right tool for the job.

Sometimes specialist tools are justifiable, like my viscous fan set, but in general specialist tools are just sooooooooooh expensive to buy, that it's not feasable.

Dave

Steaming North · Dec 6, 2012

On my 1990 Ninety I used to change the thermostat when the weather changed between summer/winter/summer.

Now I have the Disco 2 the heating seems to take a hell of a long time to kick in - is there a winter thermostat and a summer one as per the old Landy?

stchris356 · Dec 6, 2012

I took my viscous fan off about a year ago, that helps it warm up quicker!

thebiglad · Dec 6, 2012

Steaming North said:
On my 1990 Ninety I used to change the thermostat when the weather changed between summer/winter/summer.

Now I have the Disco 2 the heating seems to take a hell of a long time to kick in - is there a winter thermostat and a summer one as per the old Landy?

No, it's not the same set-up at all on the TD5. In fact changing the thermostat assembly is a fair bit more complicated.

Whip the viscous fan off as others have said and leave it in the boot 'just in case'.

Discovery II TD5 coolant 'stat

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