I sucessfully changed my 4/4 cambelt, a feeling of smug satisfaction.

A few days later I came across a YouTube video, 'How to calibrate your torque wrench'.

Out of curiosity I checked my large torque wrench, 60 - 220ftlbs, which was spot on. However, when I checked my small torque wrench, 10 - 80ftlbs, which I have had for about 10 years, I found it was 'clicking' at a value approximatly 25% below the set value. There are videos on YouTube which show how to reset a torque wrench, so now, it is spot on.

Then I realised I had a problem! My small torque wrench is very useful for the low values required when working on an aluminimum engine and I had used it for the majority of the cambelt change. 10 -15% error I could live with but not 25% when a cambelt is involved. So yes, I took it all apart and put it back together again, with the correct torque values.

The learning point, 'It pays to calibrate your torque wrench now and again' frown2

Calypso Red
1994 +8 BMW Calypso Red.
2002 4/4 4 seater BMW Calypso Red.