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Old 05-07-2011, 01:30 PM   #1
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Join Date: May 2011
Posts: 4
Year: 1989
Coachwork: Blue Bird
Chassis: International
Engine: 9.0 liter
Rated Cap: 71
9.0 liter engine problems

Hey all, I currently have a 9.0 liter engine in my bus. I have a intermediate clunk/knock, it happens every 20-30 seconds or so. I cracked every injector and there is a rpm change on all of them except one, no change when cracked. I swaped injectors with a different clynder and ruled out a bad injector. It has bad blowby when I pull the oil filler cap. Looking for someone to do a compression check right now. What do you guys think? Do I have a cracked piston/hole in piston, bad rings?
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