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1.4 tdi how to change the thermostat


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After much internet searching, I can't specifically find where the thermostat is?

Has anyone changed one? How complex is it? I assume the rad has a temp sensor, then the actual thermostat is anywhere really....

My thermostat takes a good 15-20 mins to get to 90, but it also goes up and down a bit first....once at 90 it's fine. Just seems odd behaviour as have had a few tdis but never had this, so if an easy job, I will just do it as part of ongoing mid life refurb work.....it's an 02 with 76k....

Any pointers?

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  • Solution

you didnt search very hard then did you :tongueout:

to be fair there isnt much lupo stuff out there, i end up using polo mk3 or skoda fabia manuals.

http://workshop-manuals.com/skoda/fabia-mk1/power_unit/1.4/51;_55;_59_kw_tdi_pd_engine/engine_cooling/cooling_system/removing_and_installing_coolant_regulator/

Reasonably sure lupo will be similar.

Edited by Sausage
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Yes, use a knuckle joint on the socket. Mine has A/C, but if anything I would have thought that would make changing the thermostat even harder as there are more things in the way.

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This is my car. Maybe it's different because of the a/c but I changed the thermostat without removing the alternator. And it was a waste of time anyway, it didn't make it warm up any faster!

Engine_zpsjkyhdg0h.jpg

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Yes, use a knuckle joint on the socket. Mine has A/C, but if anything I would have thought that would make changing the thermostat even harder as there are more things in the way.

I did it the same way. Like Rich doesn't know lol. He's probably forgotten more than I know.

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I did it the same way. Like Rich doesn't know lol. He's probably forgotten more than I know.

and me.
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tbf it's been on my to do list for about a year now so I might get around to it soon.

I didn't bother swapping it over when I changed the engine.

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  • 3 weeks later...

All done. Had the car stripped in about 20-30 mins.

Raised the front and chocked.

Battery disconnected.

Engine cover off.

Hose clamp off top black hose and undid electrical connector.

Undid 2 screws on air box to allow 2 black hoses to lift clear

Plug off alternator

Big nut off alternator

Small 8mm nut off alternator

16mm spanner on tensioner node/knobbly bit and pulled forward, slipped off toothed belt

Undid 3 bolts on tensioner and removed it

Put cardboard and bubble wrap on radiator in front of alternator

Swing alternator down

Loosened lower but removed 2 x long bolts on alternator

Removed bottom tray, 2x 13mm bolts under engine

Placed washing up bowl under engine

Undid 2 bolts on thermostat, fluid out

Removed black plastic hoseshoe clip on sender (pull down)

Wiggle out sensor, big gush of fluid from thermostat!

Release cap on resovoir, all fluid out (less balance in radiator)

Disconnect sensor from plug

Fitting is the reverse! Ensure toothed belt is sat flush on the pulleys. If it falls why positioning the lower one, just hold in place with tape, remove and check....,

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