Mac944 wrote:
Hi Brett,
Thanks for the useful info.
Did the another compression test tonight, unfortunately the compression test hose went bang during the wet test on the first cylinder. It was a brand new hose rated to 300psi, anyway perhaps I used slightly too much oil or it was just a duff hose.
In any case I manage to get some partial results. The dry tests were largely the same as before, the one wet test on cylinder 1 seemed to jump quite a bit.
Dry - first turn of engine was 120psi across all 4 and by 5th turn around 165psi.
Wet (only on cylinder 1) - first turn 150psi and by 5th turn 190psi.
I'll get another hose and retest but it seems from what you mentioned in your previous post that there's an issue with the bottom end. Rings is one thing but really hoping it's not the liners, was a fresh build just over a year ago.

Hi

Hmmm interesting... that made me remember another couple of bits i forgot in my big post (age lol)
1, Forget the first turn of engine, you take the HIGHEST reading you can get after 4 or 5 or 6 or 7...turns....once the reading has STOPPED rising you STOP TURNING IT OVER lol

2, OIL .. a couple or maybe 3 squirts (usually from an old fashioned squirty type oil can) ,,,,NOT half a pint lol...the reason you dont use that much you already know lol.... your hose goes bang lol

What were the liners made of ?? Steel or Alusil ...
All the best Brett
