Pico scopes and such

[Rawze]

Personally, I have never had to resort to extreme digital testing like that.

(injector leakage)...
Do an injector leak-down test on it...
ref: http://rawze.com/forums/showthread.php?t...2#pid69262

(compression loss)...

Running the engine on one or 2 cylinders at a time and comparing the differences.

Piston Rings can be tested for excessive blo-by while engine is idling by putting edge of a piece of paper over the oil fill with its cap removed. If there is then it don't matter what cylinder it was, as the whole engine has to be rebuilt any ways. A boroscope will tell you what cylinder(s) it is before disassembly.

- Valve adjustment vs. detent clearances, stem height per cylinder, will tell someone how worn out the valve seats are. Boroscope will reveal the rest if there is any suspects...

ref: http://rawze.com/forums/showthread.php?t...8#pid18718


... and worst case ... The cylinder head itself also can be tested by removing all the valve rockers and then pressurizing it (intake side, and then exhaust side) to 30 psi with all the valves closed ... and see if it leaks down.