Re: [Healeys] spin on filters

[Bob Spidell <bspidell@comcast.net>]

Ron, 

I think you're right. Was thinking it was a hydraulic tensioner, but now IIRC 
there is a spring in there and that is what applies tension (haven't had it 
apart in many years). Even so, I think the Healey tensioner is more robust 
because I think a constant pressure is sufficient; i.e. no need to apply more 
pressure with an increase in oil pressure (that seems counter-intuitive; maybe 
the 4.6 tensioner pressure is limited somehow). Still, the Healey's 
metal/rubber tensioner is more robust than the Ford's, which is made of plastic 
(the replacement tensioner appears to be beefed-up around the hole where 
breakage typically occurs). 

bob 

ps. cc'ing the List to clear up the mistake. 

-- 

Hi Bob, 

Did you mean to say that the 6-cyl Healeys do NOT have a hydraulic chain 
tensioner? 

The engine in my 61BN7 does not have a hydraulic chain tensioner. It 
operates using a steel spring that forces the rubber pad against the chain. 
There is a small oil passage through the center that allows some oil to flow 
to the friction surface but that is not providing any of the pressure for 
the tensioner. I don't know about the later engines. 

Ron Fine 
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