Broken head stud symptoms.

[wildturkey]

I have low compression in number 5 cylinder, 3L 930. Suspect it is a burnt valve from lack of maintenance/valve clearances. Have not had the time to make a pressure tester yet. This would give me better clues if I could find the time...... Have started to wonder recently if a broken stud would give low compression... without the leak making significant noise when running or under load? I tend to think I would hear a leak of that sort? Saving for a complete engine rebuild and my mind wonders when thinking about what I may find inside. Anybody had real world symptoms of broken head studs they can share? I have searched with not much luck.

[Tt surgeon]

Yes, a broken stud could lose compression.......among other things.

[wildturkey]

Really?

[kenikh]

Finding head nuts in the valve covers when doing a valve adjustment is the sure fire symptom. Take a magnet and pull on every head nut when you have the valve covers off. If any are loose... Broken head stud.

[jbailey930]

Similar sound under accel as bad exhaust gasket.

[hobie911]

Have the studs ever been changed? If not, way likely. They all brake eventually.
Millage???

[DeFreest]

My broken head stud sounded like Pop Pop Pop through the exhaust system. not like a back fire just a pop when under boost. Cant miss it. Normaly there is no noise except the regular exhaust note. If you hear a pop under boost you have a broken head stud or two.