[Healeys] 100 Engine Timing Chain Tensioner

[John Harper]

Marv

In order to keep the chain from rattling then the tensioned ring should 
be fitted. However there is a downside. Very old or poor quality rubber 
versions have been known to break up and get into the sump. Here there 
has been occurrences of these bits of rotting rubber getting into the 
engine oilways, blocking them leading to bearing failure.

I personally do fit these rings but I would advise trying to get them 
from a good supplier. I am lucky because I have a few original BMC parts 
still available. The other thing is to carefully check the gauze on the 
pump inlet filter box to make sure that there are no non standard holes 
or any other general damage.

Regards
>When I tore my engine down, it did not have the "Rubber Band" chain
>tensioner installed. I'm building it back up now and would like the group
>wisdom on the need for the tensioner. The cam sprocket I'm using is groove
>for the tensioner so I could use one. I ask because I am really lazy and
>it's going to be a real pita to install. I know some replacement sprockets
>are not grooved so at least some engines are built without them.
>Marv J
-- 
John Harper