Quote:
Originally Posted by layback40
Is it a tower problem or a bent shaft?
Some small Isuzu diesels with belt drive OHC have weak tower bolts so that if the belt fails the bolts fail before the pistons & valves are damaged. If the motor has had a problem at some stage in the past, it may have something a little out of shape.
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Hi layback40 thanks for the reply. I'm quite sure it is a tower problem as I've just replaced the shaft (I called it spindle in post #1 - I often pick the wrong word!). Also the tower at the back is the one with a knackered fitting - so I guess replacement is the safest way.
The upper surface of the head could be slightly out of whack - but I think that it is more likely that the between the mounting holes on the head is slightly shorter than the distance of the mounting bolts in the towers. I'm about to measure this to check. (To be updated)