Club126UK

Fiat 126 Chat => Fiat 126 Mechanical Problem Solving => Topic started by: Abarth982 on September 12, 2020, 03:39:46 PM

Title: Bis thermostat removal?
Post by: Abarth982 on September 12, 2020, 03:39:46 PM
To cut a long (hot) story short I've decided to try it without the thermostat.
So after lots of Plusgas, sheared rusty seized 10mm tin cover bolts, flakes of rust in eyes, skinned knuckles etc I finally got the housing off ...
Question is, is there a 'correct' way of getting the thermostat out of its housing or is it my less favoured brute force and ignorance?
Title: Re: Bis thermostat removal?
Post by: Guldbergdk on September 12, 2020, 05:06:25 PM
Previous owner removed mine. Just cut it out with a hacksaw I think:) Car runs just fine without. Never drives it during winter time anyway.
Title: Re: Bis thermostat removal?
Post by: Bar Vitelli on September 12, 2020, 05:47:50 PM
On the aircooled model you can simply drop the thermostat insde the housing which in turn opens the thermostat flap, works fine and does not rattle, not sure if the BIS is the same but worth looking at as it would save you having to open up the tinware.
Title: Re: Bis thermostat removal?
Post by: andyzeetec on September 12, 2020, 10:22:08 PM
Quote from: Abarth982 on September 12, 2020, 03:39:46 PM
To cut a long (hot) story short I've decided to try it without the thermostat.
So after lots of Plusgas, sheared rusty seized 10mm tin cover bolts, flakes of rust in eyes, skinned knuckles etc I finally got the housing off ...
Question is, is there a 'correct' way of getting the thermostat out of its housing or is it my less favoured brute force and ignorance?

It should just pop out with a bit of encouragement. Here's an old thread which has some pics attatched of thermostat  and housing..

http://club126uk.co.uk/forum/index.php?topic=9190.msg67649#msg67649
Title: Re: Bis thermostat removal?
Post by: Abarth982 on September 13, 2020, 08:26:03 AM
Thanks Andyz  :)
Title: Re: Bis thermostat removal?
Post by: andyzeetec on September 13, 2020, 09:09:51 AM
Forgot to mention, the circlip ring holds it in. See it here..

https://webshop.fiat500126.com/en/cooling/thermostat-repair-kit
Title: Re: Bis thermostat removal?
Post by: Abarth982 on September 13, 2020, 11:47:14 AM
So just in case anyone reads this in the future ...
Once the housing is off and all the crud removed you'll see the big circlip ring Andyz refers to on the engine side of the housing.  Give it a good soaking in Plusgas/something else and it should prise off fairly easily, the thermostat then just pops out.
Unless I'm mistaken my thermostat was rated at 90 degrees so due to its location I imagine the top half of the engine can get quite toasty.
Next job is to refill with household radiator cleaner/water (because I had some/it's cheaper and probably stronger) and let it do its thing for a few days then flush and repeat ...
Title: Re: Bis thermostat removal?
Post by: Ricksy1121 on October 25, 2020, 06:02:00 PM
Cool, this job is my on My list for this week 👍🏻