Bad main bearing cause low oil pressure. A engine can have a bad rod and still
have good pressure.
If it is a bad rod bearing either replace the rod or have it sized to make
sure the big end is totally concentric.
Rick
Sent from my iPhone
On Apr 23, 2011, at 5:52, "Patrick and Caroline Quinn" <p_cquinn@tpg.com.au>
wrote:
> G'day
>
>
>
> Here is something to get your collective minds around.
>
>
>
> Yesterday morning we were 560 kilometres from home in the BN3 having just
> crossed some many kilometres of featureless plains and semi dessert. We
> arrive in a large town looking for fuel and then suddenly an audible
> clanging sound emanates from the engine. We immediately pull over to
> investigate and despite much head scratching nothing significant can be
> found. I disconnect the fan belt and also eliminate a rocker hitting the
> rocker cover.
>
>
>
> Six and a half hours of sitting in the back seats of a tilt tray truck we
> arrive back home.
>
>
>
> Today I removed the rocker cover and all valves are opening correctly, plus
> the noise is still there. So what do we think the noise is? Oil pressure is
> still good, so it probably isn't a slipped big end. It is definitely not
> coming from the gearbox.
>
>
>
> Without taking the engine out, my guess is a broken crankshaft. What's
> yours?
>
>
>
> Hoo Roo
>
>
>
> Patrick Quinn
>
> Sydney, Australia
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