i am trying to picture this in my head
one bolt sheared off
the gear moving back and forth
timing out
The gears are helical cut so can slide and effect timing.
However to be honest we never did a timing check.
We made the assumption that the timing must be moving as the engine was rocking and rolling and running like a bag of bolts.
When we were playing with it, start from cold idles o.k. While still cold and rev gently it would then not idle smoothly and run as above.
Idle for a few seconds and it would smooth out but you could hear something noisy from up front.
At first we thought it could be the vane vacuum pump but was coming from deeper in the front covers.
Give it a little rev and all hell would brake loose again.
We shut her down and towed her home.
He pulled it down a few days later after a local mechanic suggested that the gears were at fault.
Sure enough they were damaged and bolts / bolt sheared and loose.
He had to change two gear sets as it was so loose as to chip teeth.
Once all fixed up ran like a dream and still does to this day.
As for "BS statement" I enjoy a good discussion and take nothing personally.
We all see things in our travels and its great to share those experiences with people.
Sometimes you get different faults / scenarios depending on how a vehicle is driven and what terrain it does.
Here in NZ most of our 1KZTE powered trucks are Japanese imports and who knows what happens to them before we get them.
Here we have people who commute long distances every day and out terrain is hilly.
Also our open road speed is 100kph. And they like to push it.
So the poor old 1KZTE is working hard out of the box.
So keep talking / typing.
