Hummer H3 For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.

Cylinder 4 is toast

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Old Apr 4, 2026 | 04:17 PM
  #1  
FaustZAR's Avatar
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Joined: Feb 2026
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Angry Cylinder 4 is toast

Yep I got P0300, originally traced to a dead coil ( not really dead, the contact spring is missing, alarm bell 1). did compression test, 0 compression on cyl 4, did a endoscope, she is looking very pretty, now I am trying to figure if I rebuild or just cut my losses, this is in Sourth Africa, Spares are extremely scarce for these in South Africa,.
 
Old Apr 6, 2026 | 09:46 AM
  #2  
Doc Olds's Avatar
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Joined: Jul 2007
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From: Boat Town USA MI
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Welcome to Hf.

Are those pieces/fragments of valves in the pic?
 
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