Hey guys,

2wd Sapphire cossie (200 block) started for the first time in quite a few years, had new fluids etc prior to starting.

First crank, straight away.. but... There is a loud mechanical knocking coming from the engine... I would describe the sound as a CLACK CLACK CLACK... Sounds like it's the top end at the rear. But it was so loud it was hard to narrow down exactly where

Trying to get some rough preliminary idea for diagnosis prior to pulling the head off.

Any ideas??
Cheers