If you have x-ray vision and can squirt a mild soapy water mixture on the rings, head gasket,valves, pre chamber seat, injector seat, glow plug seat, valves, and valve guides, then you wont need a guage.

You can time how long it takes the guage to measure 300 psi down to 200, down to 100, and so on.

Unless it is a really fast leak, you will not be able to hear air escaping.

Worst case, cracked head, block, or piston. Medium case, bad rings, burned valve, blown head gasket, bad valve guides. Better case, need new crush washers on prechambers, injectors or glow plugs. Best case, nothing wrong.

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D