[Healeys] Fan belt tension

[Bob Spidell]

I think yes, with considerable effort (the pump pulley can be rotated 
without turning the engine).  Note there were two belt sizes--3/8" and 
1/2" IIRC--used on the 6-cyl cars.

Fan belt tightness is pretty subjective, though I've seen specs like 
'this much deflection of the belt with this much weight hanging on the 
belt' (which might be doable on the bench). Too loose and you may 
overheat, and your dynamo won't charge properly; too tight and you can 
ruin bearings in short order. I usually go with about a half-inch 
deflection between the pump and dynamo, with firm pressure from a thumb.


On 6/29/2021 5:11 AM, Bob Haskell via Healeys wrote:
> With a properly tightened fan belt, should one be able to rotate the water pump pulley by pulling on a fan blade? 3000 6 cylinder.
>
> Thanks
>
> Bob Haskell '60 AH3000 BT7 (big project) '62 AH3000 BT7 (smaller project) '64 Mini Cooper (small project - by definition) '68 BMW 1600 (first car - project) '80 MBG LE (running?)
>