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Broken head stud symptoms.

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.
Old 08-05-2014, 04:41 AM
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Yes, a broken stud could lose compression.......among other things.
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Old 08-05-2014, 04:52 AM
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Really?
Old 08-05-2014, 05:26 AM
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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.
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Old 08-05-2014, 08:01 AM
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Similar sound under accel as bad exhaust gasket.
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Old 08-05-2014, 08:28 AM
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Have the studs ever been changed? If not, way likely. They all brake eventually.
Millage???
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Old 08-06-2014, 07:02 AM
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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.
Old 08-06-2014, 09:31 AM
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