Checked compression today...

[MercFan]

Did a compression test on my 300D. Warmed up the engine to the operating temp. Let it sit for a little while until I was able to handle it. Removed the hard lines, glow plugs. Reamed them all out - was meaning to do that for awhile - they were REALLY carbon-packed...

Started doing the compression test through the GP holes, but quickly realized that the space is too tight in there so switched to Injector holes and continued. Replaced the heat shields as I re-installed each one. Anyway, here are the numbers (psi):

#1 350 350
#2 320 315
#3 300 300
#4 300 305
#5 305 305

Think these numbers are pretty good - wonder what others think... Was under the impression that anything above 220 psi is within spec.

It was a little concerning to find some oil around the injectors and heat shields when I pulled the injectors off... Also #2 and #4 GPs were oily and wet... not sure if that's normal - but I guess since the compression is not perfect maybe it's just the way it is.....