Mondial QV gear oil leak

My QV has recently developed a gear oil leak. It seems to be seeping between the transfer gear cover and the part of the block that the gear oil sump (pan) sits beneath. The red arrows in the picture show seeping oil starting to appear 48 hours after a clean up.

Has anyone experienced similar and can advise how to remedy? Many thanks in advance, F-chatters.

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Thanks, Mike. I'm really hoping I don't have to disturb the gear oilsump as those springs sound very fiddly!

 

That's very interesting, thanks, Moysiuan. I won't get to the car for a few days but when I do I will see if I can put a Q tip into the "slot" and verify if it is oily inside.

 

Many thanks for the help, theunissenguido!

 

Massive thanks for this suggestion, Moysiuan, I think you have diagnosed my leak - so not gear oil at all as I had thought. There was oil in the slot and a further clean up and 12 hour wait shows a steady stream of oil coming from the slot (see pic).

The seal itself is not expensive but I've never replaced a crank seal before. Next step is to scour this site and beyond for good "how to" advice.

Thanks to all those that replied - really helpful.
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Thanks, yelcab, yes I see that it could alternatively be the three o rings you mention which I wasn’t aware of. Which, given the gear box oil smell, may be the more likely culprit. Thanks for this v helpful suggestion.

Does anyone have any advice for flywheel removal - is it simply a case of removing the 8 bolts that hold it onto the crank? Thanks

 

This video by TheHeliDoctor is really clear for the strip up to the point of clutch plate removal

 

Please, does anyone have any tips for removing the bell housing on a Mondial QV? I've removed the transfer box cover, the lower gear and its bearing so there is nothing there to stop the bell housing from sliding away from the block on its studs. But there does seem to be resistance where the transfer shaft enters the gear box. Any advice would be much appreciated! Thanks in advance : )

 

Once the bell housing has come away from the block, please can anyone help what I think will be a next dilemma, shown in this image:



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Many, many thanks for explaining that, Yelcab. Very much appreciated!

 

Thanks, guido. I had already studied the video - the helidoctor's work is first rate!

Even having watched it this part confused me but now I am clear on next steps.

For the bell housing, I think I just need to ensure it comes off absoultely square.

This forum and community is amazing - thanks to all!

 

Thanks, Yelcab, it came off easily, just as you descibed (thumbs up)

 

The bell house is off. It's very oily within the bell house and the end of the block (see first pic).

It looks as though the rubber o ring around the shaft going into the gear box had failed - hopefully that's the source of the leak, meaning it was gear oil (see second pic of the bell house).

But I'm going to also do the rear crank seal while I am here as I'd already ordered the part (a superformance seal)

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Thanks to everyone who commented on this thread. The job took AGES but is now done. The oil leak is no more and the culprit looks to have been the largest of the three O rings. It is clearly kinked in the picture.