Regarding the viscous damper- I suppose that it may not need to be replaced (hard to tell) - the broken bolts should be removed definitely. I am curious to know what could have caused the failure of the bolts (age, loose 12V alternator
Other symptoms the engine
has going on is blow-by & white/grey (hard for me to tell) exhaust
. I just replaced the injectors as there was a lot of goo (carbon) on them from bad fuel
being run thru. Also, the engine was drinking oil
(I attributed that to bad atomization of the fuel
and the subsequent de-greasing the engine as it ran). I'm wondering if the balance and vibration on the crank shaft could cause any of the above..