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Cylinder problems again
Posted: Mon Aug 14, 2006 3:15 am
by Patrick Phillips
I did my compression today and I got 2 cylinders with exhaust leakage one 55 and the other 62 /80....I took the springs off and I can reduce the leak buy putting a side load on the valve stem.....There is play in the guide....but not a lot....I checked a BRAND new cylinder and it has play in the guide as well....the cylinders are Superiors with 72 hrs ttsn....perhaps there are other post on this subject..... I also felt the faces of the followers and got on that feels rough.....I think I will just put a couple new cylinders on again to get it flying quickly then have these 2 repaired as spares....looking for good advice....
Posted: Mon Aug 14, 2006 10:59 pm
by N3243A
If the cyls. only have 72 TTSN, what about warranty work from Superior? In any case, I wouldn't buy 2 new ones so quickly until you figure out if it's a cylinder problem or something else.
Bruce
valve leakage
Posted: Tue Aug 15, 2006 1:53 am
by Patrick Phillips
The cylinders are out of warranty by time...they are 3 years old....were going to have the seats and valves dressed .....and relapped..... one of the exhaust rocker arms does not hit the top of the valve stem perfectly.....its off center a little.....anybody else noticed this before?
Posted: Tue Aug 15, 2006 6:19 pm
by Dward
I haven't flown my rebuilt engine yet but I noticed the same condition on the new ECI cylinders. Is this a normal condition?
Posted: Wed Aug 16, 2006 12:56 am
by GAHorn
The rocker not striking the valve exactly on-center is OK. That imparts a slight rotation to the valve and helps keep the seats cleaner and reduce burning.
The oversized valve guides should be replaced if the valve side-play is excessive.
Did you obtain complete assemblies? Or did you install/re-install seperate valves in new cylinders? (Built up your own assy's?)
cylinders
Posted: Wed Aug 16, 2006 10:27 am
by Patrick Phillips
I bought complete assemblies, we touched the seats and valves up yesterday ....it didn't take much...only a few seconds with the stone on the seat.....we filled the exhaust ports with varsol and no leaks....the play in the guide calls for max .0045 clearance and I am still within limints.....Although you can sure feel the play ....I guess thats how the help to keep them from seizeing up....