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Post by marcus22 on Jun 10, 2015 17:05:02 GMT -5
It obviously was sealed for a reason i dont think u are refferring to the image im talking about
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Post by upfartoolate on Jun 10, 2015 17:28:52 GMT -5
White smoke out of the breather tube is usually a sign that your rings are shot. That'd also explain the power loss.
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Post by keikara on Jun 10, 2015 17:55:00 GMT -5
It obviously was sealed for a reason i dont think u are refferring to the image im talking about I looked at that picture, and yes it does look like something had broken off of it, with the jagged edge, lighter coloring from the surrounding metal. That shouldn't have anything to do with the white smoke, however, if it is opening into the cylinder itself that would amount for the power loss due to loss of compression. Hard to say for 100% tho. |
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Post by marcus22 on Jun 10, 2015 18:00:25 GMT -5
Im just frustrated with the power loss cant even climb a hill, cant i just buy a new piston with new rings and put everything back togther seal that hole and evrything will be allright? Probaly isnt that simple huh?
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Post by pistonguy on Jun 10, 2015 18:58:54 GMT -5
It obviously was sealed for a reason i dont think u are refferring to the image im talking about I looked at that picture, and yes it does look like something had broken off of it, with the jagged edge, lighter coloring from the surrounding metal. That shouldn't have anything to do with the white smoke, however, if it is opening into the cylinder itself that would amount for the power loss due to loss of compression. Hard to say for 100% tho. I"m hearin ya but holding a cylinder head in my hand bet is was flashing that wasn't cleaned up at the factory. This hole goes straight thru the the Cylinder head stud hole. If at a slight left angle will go into the Exhaust port. If Compression or Exh. gasses were escaping there would be tell tail signs. Hold a flashlight up to it and I bet if you looked thru the head on the spark plug side you will see the light. Above the Spark Plug is open to cool combustion Chamber. |
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Post by pistonguy on Jun 10, 2015 19:04:45 GMT -5
Im just frustrated with the power loss cant even climb a hill, cant i just buy a new piston with new rings and put everything back togther seal that hole and evrything will be allright? Probaly isnt that simple huh? We need to properly diagnose before Throwin new parts at it or you may end up with the same problem and a lighter wallet. In addition to the piston we need to determine that the Cylinder Bore is good. One without the other don't work. If the Bore is good and you need a new piston assy. will need to run it to a local shop to put a Light Hone in there to break the glaze and Break in properly the new piston assy. And i will stress Light HONE! Do not try to remove slight scratches as you will only be enlarging the Bore and Loose proper Piston to Cylinder Clearance, that is critical over slight scratches. Part of the piston cooling itself is thru the Cylinder, more Clearance makes it harder for that Hot Piston to cool itself. |
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Post by cyborg on Jun 10, 2015 20:07:33 GMT -5
Looking at the side view of the piston pic I'm seeing gas flow blow by very bad,,,caked on the side of the piston like that means serious blow by issues ,,,the piston to cylinder tolerance is crazy,,, even tho it's not a good sharp pic I see textured buildup on the second land between the top and second ring,,,was the top ring hard to get out of the piston?,,,was it stuck in the top groove? The power loss you had was compression loss,,,I'm surprised it started at all to be honest with you,,there is where the" white" smoke came from,,, oil and unburnt fuel,,,,see if you can get a sharper pic of the cylinder,,$20 says it's not even round,,,,I would be checking for concentricity,and I'll bet another $20 the side piston to cylinder clearances is in excess of fifty thousand ,,,,that thing must have rattled like a coffee can full of nickels,,,check the rods little end bushing for scoring and galling,,that bush needs to be clean and straight,,,,also post a pic of the wrist pin ,,,,,let's see what that thing looks like,,,,please
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Post by pistonguy on Jun 10, 2015 20:22:00 GMT -5
Looking at the side view of the piston pic I'm seeing gas flow blow by very bad,,,caked on the side of the piston like that means serious blow by issues ,,,the piston to cylinder tolerance is crazy,,, even tho it's not a good sharp pic I see textured buildup on the second land between the top and second ring,,,was the top ring hard to get out of the piston?,,,was it stuck in the top groove? The power loss you had was compression loss,,,I'm surprised it started at all to be honest with you,,there is where the" white" smoke came from,,, oil and unburnt fuel,,,,see if you can get a sharper pic of the cylinder,,$20 says it's not even round,,,,I would be checking for concentricity,and I'll bet another $20 the side piston to cylinder clearances is in excess of fifty thousand ,,,,that thing must have rattled like a coffee can full of nickels,,,check the rods little end bushing for scoring and galling,,that bush needs to be clean and straight,,,,also post a pic of the wrist pin ,,,,,let's see what that thing looks like,,,,please K Borg were am I missing that Pic? Yup and with that amount of Piston to Wall clearance she'll rattle till she cracks then busts the skirts off going thru the bottom of the case. I use to have a bucket full of these and mounted them on what I called the Wall of Shame. |
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Post by marcus22 on Jun 10, 2015 20:41:00 GMT -5
For some reason i cant post images but the round cylinder you are talking about is smooth as a babys but no scratches perfect so that hole i should not seal?
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Post by cyborg on Jun 10, 2015 20:45:43 GMT -5
It was in the pic where the piston was laying on its side on the white towel or carpet,,,it was crusted on the side of the piston above the top ring which is "normal",,, but on the second land? I don't think so,,,I think ultimately the top ring froze in its groove and it was all over but the cryin after that,,,the pics were fuzzy and that's about all I could get out of them
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Post by cyborg on Jun 10, 2015 21:01:58 GMT -5
I would love to see a clear pic of the cylinder please,,,,,this is me musing here,,,,I think this engine got ran out or very low on oil from your " friend" and the top ring froze in the piston,,,I think a good solid hone in the cylinder measure and get the correct size piston and rings and if the rods little end bush is good reassemble and go riding or if they're cheap enough get a piston,rings,cylinder combo assemble then go riding
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Post by pistonguy on Jun 10, 2015 21:13:21 GMT -5
K, Borg found the pic.
Your right on, the piston has a Cam and taper to it and it appears the taper is gone.
Substantial Blow by.
You just showed me up in my world, dmm!!
This guy is good!
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Post by cyborg on Jun 10, 2015 22:13:28 GMT -5
I hate to be a pest but stack the rings up and take a pic of a side view of the edge please and also if you do take a clear pic of the cylinder do it so we can see the swept area of it thank you
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Post by marcus22 on Jun 13, 2015 23:30:32 GMT -5
okay I was already planning on installing a big bore kit I got the 80 c_c big bore kit just the piston cylinder installed everything and won't turn over hold the plug what is black put my finger over the whole barely any compression at all any suggestions
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Post by pistonguy on Jun 14, 2015 1:36:31 GMT -5
okay I was already planning on installing a big bore kit I got the 80 c_c big bore kit just the piston cylinder installed everything and won't turn over hold the plug what is black put my finger over the whole barely any compression at all any suggestions K, Bro, Kinda lost me here. Can you better explain or different verbiage please? |
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