Can a 99 GU RD28eti engine intermittently lose timing?

[eph444]

My 99 GU RD28eti engine seems to intermittently lose timing every now and again. When it does it sounds louder and lacks power. I've taken it to a few mechanics but when I do it never seems to play up. Any suggestions would be greatly appreciated.

Cheers

[happygu]

Ordinarily I would say no .....

But there is the known problem with the 2.8's where the Harmonic Balancer Keyway flogs out, and the harmonic balancer can fall off.

I would be starting here, as if it is shifting on the camshaft it will affect the crank angle sensor, and thus the timing

Mic