Thread: Isuzu 4BE1 head bolt tension

My sept '88 manual says:

1st step (lb.ft / Nm)
50.6 / 68.8

2nd step
65 / 88.3

3rd step
90-120 degrees (you need to buy or make a degree wheel to do this - quite simple).

It says that old head bolts can be reused and gives torque settings for new and old bolts (for earlier engines using the non angular method). I cannot see how that would change, and the angular method would compensate for new/old.


The old method says 83.2 / 104.5 for reused bolts, however as Bush65 has explained many times, angular tightening methods are much better.

A degree wheel is only needed if you don't know what a 1/4 turn looks like?

Originally Posted by Dougal

A degree wheel is only needed if you don't know what a 1/4 turn looks like?

Good one being an airframe and engine fitter I would probably loose sleep if I did it without a special tool.