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MG Midget and Sprite Technical - Engine on eBay

See item 181317168500

A cracking 10CC type 1098 engine but any idea why it should spew oil out the rear engine seal when it didn't before?

I'm not the seller BTW, I just can't stop searching ebay for Sprite related things!!!!!!!!!!!!!

Rob
Rob aka MG Moneypit

I saw that and thought it had a strange breather valve fitted.

Also, when the engine block was machined, they may have removed the top part of the scroll seal and not refitted it properly.
Dave O'Neill2

Dave
Your assumption is probably correct with removal of the moustache. It could probably be re-aligned with a suitable mandrel or dispensed with altogether and a seal conversion fitted.It is for sale because Roger chose to fit a 1275.
Alan
www.masckent.org
Alan Anstead

Surely it should have gone back to the engine builder.
HALL JOHN

I've got a 10CC engine in bits I was rebuilding and I have taken that part off too. Does that mean I will have the same problem??????

And as John Hall asked why didn't it go back to the builder?

Rob
Rob aka MG Moneypit

Rob
You'll need to use a mandrel to correctly align the 'moustache' or you will probably get leakage.
I dont know the answer to the second part of the question.
Alan.
Alan Anstead

I thought you needed to wrap a feeler gauge round the scroll to get the right gap and then tighten it all down. This was how I was told you got the right clearance. I can't recall the thickness required.
r thomas

I can't find anything in the midget WSM, but the WSM for the Marina 1098 engine - Yes, 1098 Marina - says there should be 0.004" clearance.
Dave O'Neill2

John,

Why return it to the engine builder? The seller mentions it was fine to start with and has subsequently started leaking, my experience with rings bedding in say leakage woukd be high till the rings bed in then very little. Might be the builders fault and something has loosened or it could be the owner has knackered the rings, difficult to tell without further information.
David Billington

Is the 10CC engine the larger or the smaller crank size?
Guy W

10CC is 2" mains
Dave O'Neill2

Thanks Dave. :-)
Guy W

David, if you read the text it says it was ok pre-rebuild but now leaks post rebuild. I presume he lived with it for 3000 miles but it has got progessively worse. Also it's been sleeved so I wonder if it has broken through into an oil gallery when they bored it out to sleeve it. In either case I would say it is the builders responsibility to sort it.

Rob
Rob aka MG Moneypit

Rob,

Quite right I missed that, I do think that is an issue for the engine builder.
David Billington

This thread was discussed between 07/02/2014 and 09/02/2014

MG Midget and Sprite Technical index

This thread is from the archive. The Live MG Midget and Sprite Technical BBS is active now.