195LikesNovarossi engines thread
08-20-2012 | 04:50 PM
#4401
Tech Rookie
Joined: Dec 2010
Posts: 6
From: Korea, South
Maybe some piece parts can makes this accident.
I will check all parts of engine and I will exchange the conrod to new one.
Thanks.
08-20-2012 | 04:55 PM
#4402
Tech Rookie
Joined: Dec 2010
Posts: 6
From: Korea, South
No damaged at the side of the piston, I would say if you did not have a blown plug or a broken ball from a bearing it must be a to low head clearance. First of all check the play on the main bearing and conrod. If that is all OK then you must add at least 0.5mm of headshims.....
I will exchange the conrod to new one.
And then I will test this engine with more shims.
Thanks.
08-20-2012 | 05:21 PM
#4403
Tech Rookie
Joined: Dec 2010
Posts: 6
From: Korea, South
Ever seen the result of a pre-detonation? That looks more like it was sandblasted, this is not. And the moment has nothing to do with the opening of the exhaust.
Normally you get the ignition just before TDC and because there is a slow reaction the combustion after TDC. With pre detonation the combustion will start just before or on TDC making a uge pressure.
This looks like dirts from somewhere or I would say a to low head clearance.
Normally you get the ignition just before TDC and because there is a slow reaction the combustion after TDC. With pre detonation the combustion will start just before or on TDC making a uge pressure.
This looks like dirts from somewhere or I would say a to low head clearance.
So, as you said, I think, it means some dirts from somewhere make scratch not only the conrod but also piston & under-head.
I will check every parts of my engine and make them clean again.
Thanks.
08-25-2012 | 11:30 AM
#4409
