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'60 5Ta Breather Spewing Oil
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Stoo63
GLASGOW
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April 19, 2020 - 10:04 pm
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Recently overhauled my unit twin 500. Goes sweet but spewed oil out of primary breather. Appeared that Haynes advises to install the crank seal back to front. So, today I stripped out the old seal and fitted a new one the right way round. All good. Rebuilt it all, started up and .... you guessed ....oil still peeing out of breather. It's not squirting in a jet but running out steadily. Anybody know these engines, had similar woes and have any possible solutions?

Thanks,

Stewart

'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

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Blue Heeler
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April 20, 2020 - 12:23 am
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What a pain Stoo. Not worked on a Triumph twin since 1979, but have you tried these chaps?.....

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What about the other chap/s on here with 5TAs?

Wet-sumping, oil pump issue(balls-seats, springs, relief valve), petrol in sump from leaking tap, rings still settling in... sort of stuff that pops up on the singles too ? 

Blue

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sunny
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April 20, 2020 - 7:42 am
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the   2   oil  feed  &  rocker   feed  pips  the  wrong      way  may  be            and  its  a  shame   the  Haynes  manuals   arnt    that  good  to  rely  on   

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mcafee
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April 20, 2020 - 12:08 pm
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Hi the Triumph workshop manual says that the oil seal should face into the chain case and not into the crank.Did you check that the brass breather valve on the end of the inlet camshaft was properly located.

David

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Stoo63
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April 20, 2020 - 12:35 pm
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Thanks for that David. I'll check that breather valve as well. Previously, according to Haynes, I'd fitted the seal with the flat side toward the crank. Triumph rat.net has a thread about that being incorrect and so I removed it and replaced with a new one with the flat side facing "out" toward the primary side, which I would have thought made more sense as the pressure is coming from the crankcase side? More research required perhaps.

'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

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mcafee
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April 20, 2020 - 5:22 pm
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675670EB-91C9-421E-8E4E-60F4F2BEFBE5.jpegHi Stewart,I have copied the section from the manual about fitting the crankcase oil seal.In the past I have made an adaptor to fit into the TDC finder hole and connected a breather with a non return valve to help the crankcase breathing.Hope this helps

David

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Stoo63
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April 20, 2020 - 5:29 pm
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That's brilliant, Dave. Thanks a lot 🙂

'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

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mcafee
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April 24, 2020 - 6:34 am
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B9CA4D86-CA45-4599-A1B8-116524A46EBD.jpegMorning Stewart,I found this photo of a 500TriumphI restored some time ago.If you magnify it you can see the crankcase oil seal.

Stay safe David

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Stoo63
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April 24, 2020 - 7:56 am
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Thanks a lot, Dave. That's how I had it before and now, due to the internet(!) I've changed it round. So, I'll have to strip it again and replace. Thankfully, I bought two seals - just in case!

All the best

Stewart

'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

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