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standard cx500 1980
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hi all just a quick one if someone can help! got an oil leak from the tensioner bolt on the back of the engine, can it be removed and a new oil seal fitted ?
 

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Yes, but only after you drop the engine and remove the rear cover. Replace the o-ring the next time that you have a reason to drop the engine and open it to repair something else.

Clean the area around the bolt and then apply some RTV to make a seal for the time being. Repeat every time that you adjust the timing chain tension.
 
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Just to add to it the cam chain tensioner has a spring pulling on it and a head that's kind of the opposite of what people think it should look like so it can't unscrew anyway. And if it does something will break so scuff and dab RTV on it and call it good till you need to take things apart.

Many here have done that and as long as you're in there replace every gasket, oring, any problem area and you won't have to worry about it next time.
 

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This is why the cover has to be removed. Note the flange on the bolt that won't fit through the hole in the rear cover.

I've seen dire warnings a number of times never to loosen the adjuster bolt mare than 1.5 to 2 turns or it falls out and the tensioner components fall apart.

Myth.

In actual fact you should unwind the bolt at least 3 turns as the bolt imprints into the tensioner body if overtightened. If you don't wind the bolt clear of these indents you may have made the adjustment without the tensioner actually having moved.
 
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