Monthly Archives: February 2018

Tick, tick, tick

Another issue from the Very Long List is the ticking noise from the engine. Since I bought the car in 2006 this noise has always been there. Setting valve clearances and a complete rebuild of the rocker gear didn’t fix the problem. www.narrywoolan.com.au/lancia-aprilia-1070/Rocker-gear

With all the other engine problems going on I’ve started a complete rebuild, more details to follow in the future! Extracting no.1 piston reveled the source of the ticking noise, a broken piston ring. How long it’s been there I’ve no idea but luckily there was no damage to either the bore or piston.

The engine was rebuilt in the UK back in 1991: (www.narrywoolan.com.au/lancia-aprilia-1070/uk-restoration-notes/note-5,  and was fitted with AE/Nural pistons, quite different to the originals.

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Video

Starter motor

Following up from the “Very Long List” post. First task was take out the engine and gearbox, my favorite pass time!

The problem with the starter motor not engaging correctly quickly showed up when I tested it on the bench. The pinion gear wasn’t engaging fully, see the first video.

What should happen is this:

For those not familiar with the starter motor on an Aprilia it is a Marelli MCE 0.4/6R, mine is six volts, and is activated by pulling a lever under the dashboard then via a cable to another lever on the starter, none of those complicated electronic solenoids to fail, as long as the cable doesn’t break they are super reliable!

A close inspection and comparison with my spare unit reveled the cause of the problem. Someone in the past, not me, had soldered a copper button on to the contact unit and welded an extra bit onto the actuating lever, see the comparison with the spare motor. Simply put this didn’t allow the pinon gear to travel its full length and engage the ring gear correctly or sometimes not at all.

A simple job to remove the extra button, grind off the extra weld and I now have two working starter motors.

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