Fiat 1100 Gearbox Drain

**VicC** · 2019/06/17, 06:07 PM

I know, it's definitely not a bakkie, and yes, I should be able to do this... but hey, it is what it is....

I'm trying to change the gear oil in my daughter's little Uno 1100 Mia 5 speed and I'm battling to find the drain plug - well one I can undo... The filler plug is on the side of the box, facing the grill so to say, and that came out OK. But the lowest "drain" plug I can find is also a 19mm Allen Key plug, directly below the left drive shaft. For some reason, it even has yellow paint on it.

But here's the strange part, although the engine sump and gearbox filler plugs are both taper thread plugs, they are undo-able with a normal ratchet. But this 19mm plug below the drive shaft is tight - even with a 1m T Bar, it doesn't want to undo. And yeah, I checked, I'm trying to turn it anti-clockwise.

Fiat boffins - am I missing something? Surely a drain plug can't be that tight. I mean, I had oats and everything today... I feel like I should be posting "asking for a friend" LOL.

**jfh** · 2019/06/17, 06:16 PM

A lot of the plugs on the Uno was treated with a locktite like substance.
You will have to apply heat to break the locktite bond.

I had to do this on the sump plug on my old 1100.

**VicC** · 2019/06/17, 06:31 PM

Originally Posted by jfh

A lot of the plugs on the Uno was treated with a locktite like substance.
You will have to apply heat to break the locktite bond.

I had to do this on the sump plug on my old 1100.

Thanks man. This helps a lot. Don't feel so bad now. I have had some "interesting" experiences working on this little car. Did the brake pads once... never again. One pair of hands wasn't enough. But have to admit, for a 1100, it's still a spunky little car with lots of get up and go spirit.

**VicC** · 2019/06/23, 06:16 AM

Originally Posted by jfh

A lot of the plugs on the Uno was treated with a locktite like substance.
You will have to apply heat to break the locktite bond.

I had to do this on the sump plug on my old 1100.

Just an update. Thanks again JFH. I put some heat on the plug itself (quite a few vids on YouTube on undoing Loctite bolts), and out the drain plug came. Problem sorted with a little portable blow torch from Midas.