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CB350F crankshaft oil seal leak

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royhall:
Well I was going great with the 350F rebuild.

Got the wiring together this afternoon (still needs tidying) and everything checked out and worked great first time.

Then spun the engine over on the starter with the plugs out to get oil pressure up. Got pressure fairly quick and it holds for about 8 seconds before the light comes on again, so all's good.

Then I noticed a pool of oil on the floor coming from the timing cover. On closer inspection its the timing side crankshaft oil seal that's pouring oil out. Its either a bad seal or I've put it in the wrong way around.

Anybody know if it can be changed in situ.

Got a horrible feeling the engines coming out again to split the cases.

Hope not, don't think I could face that at the moment as that's a long way in reverse.

Thanks all.


PS this was the oil seal kit I used:  http://shop.honda4.nl/catalog/product_info.php?cPath=35_93_105&products_id=734

Orcade-Ian:
Oh heck Roy, that's a real downer.
I suppose it could be a bad seal to start with or fitted the wrong way.  After pulling all of the gubbins out from the timing side you will soon know.  Many years back I extracted a leaking, original seal using a slide hammer on self tappers around the seal.  I then fitted a new seal with a made up ring drift to carefully tap it in (a good socket might work) having first smeared the outer edge with Hylomar.  It did the trick and never leaked again.
Might be worth a try, there's only the price of 1 seal to lose.

Ian

royhall:
Yep I'm almost certain its the wrong way round. Been checking Google pictures and its the seal with the steel backing ring. I fitted that ring to the outside of the engine, should be inside I think. O B****cks.


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MCTID:
Nils carborundum Roy......at least you know what the problem is and how to sort it.

Have a good night's sleep and it will all look better in the morning......honest.

royhall:
Thanks guys.

After a lifetime in engineering I put a seal in the wrong way round. "What a Muppet". I'm going to be sat in a window dribbling by the time I'm 60 at this rate. ;D

Think I will attempt Arcadian's fix first off as another rebuild is a big price to pay for a small mistake. As long as I don't damage anything but the seal its worth a go. I may have to make a bespoke puller of some kind?

And here is the picture taken during the engine build clearly showing the offending seal in the wrong way round. I wouldn't mind too much if there wasn't a rib on the seal that fits in a slot.

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Cheers all.

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