[Healeys] Loud Metallic Click

[Dave Porter]

..now it will be interesting to learn if it was merely metal fatigue or from
running too much ignition advance. 
Dave
PS you should be able to tell by the edges of the metal.
Sharp/jagged=fatigue or rounded/melted= preignition


frogeye at porterscustom.com

Porter Customs   2909 Arno NE
Albuquerque, NM USA 87107
505-352-1378
1954 BN2  1959 AN5
Porter Custom Bicycles

cars:
 www.britishcarforum.com/portercustoms.html
gallery:
http://picasaweb.google.com/porterscustombicycles/PorterCustomBicyclesStuff

GO HERE: http://porterbikes.com/  nice pictures-fun facts-my world


To: 'Patrick and Caroline Quinn'; healeys at autox.team.net
Subject: Re: [Healeys] Loud Metallic Click

G'day

Listers would recall the loud and expensive noises coming from the engine of
the BN3/1.

The engine is still in the car, but everything hanging off it has now been
removed. Yesterday my eldest son and I removed the cylinder head. It was a
struggle, but once the overdrive throttle switch was removed it was possible
to lift the head, move it sideways and then away from the engine.

At first glance everything appeared as it should be, but looking more
closely today, a 12mm by 5mm piece from the edge of the crown of the No 2
piston was missing. Small bits of aluminium were embedded in the top of the
piston and minor damage was evident in the combustion chamber. The top
compression ring was intact hence the smooth but noisy running.

Watch this space.

Hoo Roo

Patrick Quinn
Sydney, Australia