Original Posted By: Ryan Mueller
Subject: Re: Pietenpol-List: Engine 2 Pictures Thoughts?
Re: Pietenpol-List: Engine 2 Pictures Thoughts?
Re: Pietenpol-List: Re: Engine 2 Pictures Thoughts?
Original Posted By: "Jack(at)textors.com"
3D=__Part17396FBE.1__=--________________________________________________________________________________Subject: Re: Pietenpol-List: Re: Engine 2 Pictures Thoughts?
3D=__Part17396FBE.1__=--________________________________________________________________________________Subject: Re: Pietenpol-List: Re: Engine 2 Pictures Thoughts?
Original Posted By: Ben Charvet
Scott, what is the reason for the notches on the piston tops?Jack TextorSent from my iPadOn Feb 14, 2012, at 2:40 PM, "AircamperN11MS" wrote:> > Hi Mike,> > Looks like someone did a field top overhaul on it. I can see that the cylindersare the old style with the bronze spark plug inserts and it also appears tohave possible cracks that run from the spark plugs to the exhaust seats. Youcan see there is one from each spark plug hole. They could be serviceable.It would be worth having them inspected by a shop. Something you could do yourselfis to put some spark plugs in the cylinders and pour some kerosene in them.If the cracks are big or the valves are not seated good you will see theleaks. Keep in mind that these little Cont engines will just keep running andrunning. Not everything needs to be brand new in them. There are serviceablelimits in the overhaul manual. As long as your parts meet those, considerthem good.> > > BTW, My cylinders are also .015 over. > > Regards,> > --------> Scott Liefeld> Flying N11MS since March 1972> Steel Tube> C-85-12> Wire Wheels> Brodhead in 1996> > > > > Read this topic online here:> > http://forums.matronics.com/viewtopic.p ... 303#366303> > > > > > > > > > ________________________________________________________________________________Date: Tue, 14 Feb 2012 20:02:14 -0500
Scott, what is the reason for the notches on the piston tops?Jack TextorSent from my iPadOn Feb 14, 2012, at 2:40 PM, "AircamperN11MS" wrote:> > Hi Mike,> > Looks like someone did a field top overhaul on it. I can see that the cylindersare the old style with the bronze spark plug inserts and it also appears tohave possible cracks that run from the spark plugs to the exhaust seats. Youcan see there is one from each spark plug hole. They could be serviceable.It would be worth having them inspected by a shop. Something you could do yourselfis to put some spark plugs in the cylinders and pour some kerosene in them.If the cracks are big or the valves are not seated good you will see theleaks. Keep in mind that these little Cont engines will just keep running andrunning. Not everything needs to be brand new in them. There are serviceablelimits in the overhaul manual. As long as your parts meet those, considerthem good.> > > BTW, My cylinders are also .015 over. > > Regards,> > --------> Scott Liefeld> Flying N11MS since March 1972> Steel Tube> C-85-12> Wire Wheels> Brodhead in 1996> > > > > Read this topic online here:> > http://forums.matronics.com/viewtopic.p ... 303#366303> > > > > > > > > > ________________________________________________________________________________Date: Tue, 14 Feb 2012 20:02:14 -0500
Pietenpol-List: Re: Engine 2 Pictures Thoughts?
Original Posted By: "AircamperN11MS"
Thank you all for the suggestionsChrisSacramento, CaWestcoastpiet.com________________________________________________________________________________Subject: Pietenpol-List: Re: Engine 2 Pictures Thoughts?
Thank you all for the suggestionsChrisSacramento, CaWestcoastpiet.com________________________________________________________________________________Subject: Pietenpol-List: Re: Engine 2 Pictures Thoughts?
Original Posted By: "Douwe Blumberg"
I only recall having a single notch on my pistons. Mine were identifiers for properpiston alignment. I have a C-85-12F. Mike's pistons have two and I canonly assume that his can be installed either way. I would need to check thebooks for that one to be sure and mine are currently loaned out. Mike, Another place prone to cracking is the exhaust valve guide bushing boss.You would see if it were cracked by looking in the exhaust port just like thepic you have posted. If it were cracked, it would be parallel to the exhaustguide. They can be large and obvious. Yours looks good. Keep plugging along and soon you will have a great engine to fly behind. I rebuiltmine back in 1997 after I was having some stuck exhaust valve issues. Idid a bunch of horse trading and it ended up costing $1300 to rebuild. My biggestsavings was when I sent in my cam and lifters to have them reground. I sentin two sets and was hoping to get one good set out of them. They told meboth sets were good so I asked them if they wanted to buy the second set fromme and a deal was made. In the end they sent me one set freshly yellow taggedand a check for $35. That was a good day.--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/moja ... __________
I only recall having a single notch on my pistons. Mine were identifiers for properpiston alignment. I have a C-85-12F. Mike's pistons have two and I canonly assume that his can be installed either way. I would need to check thebooks for that one to be sure and mine are currently loaned out. Mike, Another place prone to cracking is the exhaust valve guide bushing boss.You would see if it were cracked by looking in the exhaust port just like thepic you have posted. If it were cracked, it would be parallel to the exhaustguide. They can be large and obvious. Yours looks good. Keep plugging along and soon you will have a great engine to fly behind. I rebuiltmine back in 1997 after I was having some stuck exhaust valve issues. Idid a bunch of horse trading and it ended up costing $1300 to rebuild. My biggestsavings was when I sent in my cam and lifters to have them reground. I sentin two sets and was hoping to get one good set out of them. They told meboth sets were good so I asked them if they wanted to buy the second set fromme and a deal was made. In the end they sent me one set freshly yellow taggedand a check for $35. That was a good day.--------Scott LiefeldFlying N11MS since March 1972Steel TubeC-85-12Wire WheelsBrodhead in 1996Read this topic online here:http://forums.matronics.com/viewtopic.p ... ttachments: http://forums.matronics.com//files/moja ... __________