ISX CM870 Breaking front Timing Actuator, Thoughts...

[EndlessDan]

Hi Guys, Long time reader but first time posting.


We have a ISX cm870 in a 2007 International that has been giving us some trouble breaking the front bank Timing Actuator. It Actually started about 2 years ago. First it it was leaking, we changed the o-rings, then broke the bolts a month later, we replaced the bolts and about a month or 2 later split the whole actuator in half and we replaced it with a new actuator.

then 1.5 years later it broke it again and replaced it with a used one to make it back it actually ran for about 5 weeks and broke the bolts. this time we want to find the issue because obviously there is a problem for the exact same timing actuator having all the issues.

Any ideas? looking around found that it could be the the pressure relief valves on the IFSM or clogged dampers.

or possibly as bad check valve in one of the 3 front injectors.

Has this ever happen to one of you? Any ideas or comments will be greatly appreciated.


Dan.