So...there's a tapping / rattle at the front of the engine, passenger side down by the PS pump (3.5 efi 1988). Long screwdriver stephoscope has removed all the other likely suspects (as has changing and rebuilding various bits...oh well).
It looks like the actual pulley (ETC6408) is making the tapping noise as disconnecting the alternator from it (runs from the double pulley on the PS pump) makes the noise go away. Noise isn't the alternator as that's new. Power steering pump has been rebuilt and stethoscope has that running quietly.
So i can only conclude the pulley centre is fractionally worn or the bolts are stretched. Either way new pulley on the way so we'll see when it all goes back together.
Just thought i'd post to add to the 'annoying rattle' list and hopefully give some poor sod a possible solution.
It looks like the actual pulley (ETC6408) is making the tapping noise as disconnecting the alternator from it (runs from the double pulley on the PS pump) makes the noise go away. Noise isn't the alternator as that's new. Power steering pump has been rebuilt and stethoscope has that running quietly.
So i can only conclude the pulley centre is fractionally worn or the bolts are stretched. Either way new pulley on the way so we'll see when it all goes back together.
Just thought i'd post to add to the 'annoying rattle' list and hopefully give some poor sod a possible solution.