Time to rebuild?
I agree something is off. That high cylinder pressure does not match the leakdown numbers.With so many cylinders with such high LD numbers, that engine should have been darn near impossible to start.
>The first thing I would do is assume that the constant short trips have caused carbon and gum and sludge issues inside, so I would do the full-boogie additive treatment, run it on the hiway for an hour,loading it up pretty good now and then.
Then I would check/adjust the valve lash. Now I would repeat the LD test. Anything over 8% out the valves, for me, the head is coming off.Clean leaky valves never get better.After that I would do an oilchange, and get that treatment stuff out
If the LD comes up to 8% or better,I would repeat the compression test at this time. Good numbers mean the rings aren't stuck,if nothing else.
I have not seen High LD numbers and High compression numbers ever together. Those cylinders with 40/60% numbers should have been pretty much dead; perhaps mustering 30psi.
I mean, think about it;
If you inject 100 psi into a cylinder, and it shoes 60% LD, that means there is only 40% left! and 40% of 100psi is 40psi. If a perfect slanty cylinder could make 130psi cranking pressure, and 60% of that leaked away, that leaves just 52 psi.
Unfortunately cranking pressure is a dynamic thing, and at 60% LD, I would not expect 52psi cylinder cranking pressure, hence the 30psi remark.
So either the Compression numbers are off, or the LD numbers are.
Or I suppose the cam could be out of time.