English French German Italian Portuguese Spanish Swedish

rotax brp

 

80/64 compression cyl 3 Part 2

  • Pete Christensen
  • Pete Christensen's Avatar Topic Author
  • Offline
  • Fresh Boarder
  • Fresh Boarder
More
8 months 4 days ago #15288 by Pete Christensen
Pete Christensen created the topic: 80/64 compression cyl 3 Part 2
Doing compression test all 80/79 except cyl 3. 912 is early 80 horse under 1200 hrs. Runs just fine. Cyl 3 was 80/76 last year and similar for the last several years. Plugs all looked good. So I ran the engine for several minutes and retested. NO Joy. Went flying for an hour, retested, NO Joy. On some of the tests I could hear the oil tank bubbling. On others I'm pretty sure I heard air hissing in the exhaust. My wimpy compressor kept cycling on and off so hearing the noises was hit and miss. I believe I need to take the head off next and inspect the valves. Maybe remove the cyl and piston?

Please Log in or Create an account to join the conversation.

More
8 months 1 day ago #15312 by gaetan belanger
gaetan belanger replied the topic: 80/64 compression cyl 3 Part 2
I Pete
What is your procedure for compression test ?
once you are ready to take compression on #3 pull the plug of your compressor !
take a direct compression test to compare ( automobile type)

Phil

Please Log in or Create an account to join the conversation.