ISX EGR 550 hard to Start when Hot

[alamow]

Thanks for your responses. The engine turns over up to a quarter of a turn and then stops. Very sluggish but will not turn further than a quarter of a turn until the engine cools. Once cooled the engine spins freely and starts normally.

I added 3 liters of water for the first time last week as water was pushed out of the expansion tank overflow after travelling a 1000km. I'm not sure if the mechanics had over filled the expansion tank as I did not lose water again. I did ask but there are three mechanics and I haven't caught up with all of them yet.

I'm not sure if the following is relevant. On a long decline with the engine brake activated there is a lot of white smoke from the exhaust. I rarely add oil between services, at most 4 liters over 20,000km.

The overhead has been checked twice, once by Cummins.