glow plugs ultimate test

[Beirut Brit]

Hi
I have a project 300 SDL and am trying to work out why it is such a difficult starter when cold. I have checked the glow plug black box with the six individual outputs and have also checked the individual glowplugs for zero resistance with a multimeter.

Can it still be the glowplugs? Are they easy to pull out and change on a 603 or are they prone to getting stuck and threads being stripped?

Or should i be looking elsewhere, like the hydraulic lifters, for example. I have noticed that there is a clicking/ticking sound both from cylinder one and six. Lazy bucket lifters?

thanks


MJ in Morocco