P700 White smoke and loss of power

[bigshoe]

What valve spring tool would you recommend?

Would this would work?

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Yea that should work

 

[Admin]

 

[Farmer]

Ok, I think I have a gameplan. I am going to order a new piston and replace the valve stem seals and all the gaskets. Then pray like hell that the one of those was the problem.

Thats usually my game plan. I'm usually wrong.Hope your luck is better!!

 

[SWB]

Be sure get new rings.

 

[joec1056]

Does anyone know if the standard bore size is 101.97 mm? I'm assuming it is, but didn't want to order the wrong part. Also, does anyone have any experience with Namura? That's what I see come up the most from my search for top end rebuild kits.

 

[SWB]

Also, probably need to hone it too. So, rings will stick.

 

[joec1056]

Also, probably need to hone it too. So, rings will stick.

Will do, I have a buddy that is going to bring me a honing tool this week.

 

[SWB]

Hone just enough to get that cross hatch pattern. Don't take out to much.

 

[Gentleben]

Pretty good read. Looks like I’m in the same boat. I figured mine had something wrong. Spark plugs were wet and fouled to the point of not starting. Once I clean the plugs it fires right up. Compression on mine after it’s warmed is about 60 psi. I went to borescope but the camera was to big, But I could definitely tell the cylinder is wet.

 

[DG Rider]

Pretty good read. Looks like I’m in the same boat. I figured mine had something wrong. Spark plugs were wet and fouled to the point of not starting. Once I clean the plugs it fires right up. Compression on mine after it’s warmed is about 60 psi. I went to borescope but the camera was to big, But I could definitely tell the cylinder is wet.

View attachment 249208

How many miles?

 

[Gentleben]

12,000 miles

 

[bigshoe]

I think u stated that the cylinder walls have scaring on them. if the cylinder wall is scared up new rings is only gonna last couple hundred before it starts smoking again. Having a cylinder bored is cheap and a 30 over piston is no more expensive than a standard piston. Don't use a ching Chong piston off ebay the rings will not last.

 

[SWB]

Put good piston rings in it. Do it right 1st instead of 2nd time.

 

[joec1056]

So I think I may have fixed the issue. The valves were caked in burnt oil(picture attached) below the seals which leads me to believe I had bad valve seals. There was so much black crap on there that I don’t think the valves were fully seating allowing oil to enter the jug and exhaust. So I honed the jug, replaced the piston and rings, put new valve seals, and all new gaskets. So far so good! A little smoke when I fired it back up from the oil I coated everything in, but after a few minutes it went away. Let’s hope it holds!

BTW, this is the first time I’ve ever opened an engine up, so I took my time and leaned on some friends to guide me through. Really nerve racking, but fun at the same time!

 

[NTCPrezJB]

So I think I may have fixed the issue. The valves were caked in burnt oil(picture attached) below the seals which leads me to believe I had bad valve seals. There was so much black crap on there that I don’t think the valves were fully seating allowing oil to enter the jug and exhaust. So I honed the jug, replaced the piston and rings, put new valve seals, and all new gaskets. So far so good! A little smoke when I fired it back up from the oil I coated everything in, but after a few minutes it went away. Let’s hope it holds!

BTW, this is the first time I’ve ever opened an engine up, so I took my time and leaned on some friends to guide me through. Really nerve racking, but fun at the same time!

View attachment 251363

Fingers crossed for you

 

[SWB]

Hope you got it headed in right direction. Keep us posted.

 

[Mudwing]

So I think I may have fixed the issue. The valves were caked in burnt oil(picture attached) below the seals which leads me to believe I had bad valve seals. There was so much black crap on there that I don’t think the valves were fully seating allowing oil to enter the jug and exhaust. So I honed the jug, replaced the piston and rings, put new valve seals, and all new gaskets. So far so good! A little smoke when I fired it back up from the oil I coated everything in, but after a few minutes it went away. Let’s hope it holds!

BTW, this is the first time I’ve ever opened an engine up, so I took my time and leaned on some friends to guide me through. Really nerve racking, but fun at the same time!

View attachment 251363

Nice work. 😎 Keep us posted. 😉

 

[joec1056]

Nice work. 😎 Keep us posted. 😉

Nothing but good news so far. Ran it for about 45 minutes last night and it didn't smoke at all! I got some advice from a buddy that I should run some heavy rpms for a bit and then let the side by side sit for a while and cool off to make sure that the rings seat. Should I do that?

 

[Mudwing]

Nothing but good news so far. Ran it for about 45 minutes last night and it didn't smoke at all! I got some advice from a buddy that I should run some heavy rpms for a bit and then let the side by side sit for a while and cool off to make sure that the rings seat. Should I do that?

I’m not sure about the cooling off part but I would check the manual about how to break in new rings. Some guys do run them hard to seat the rings. I just drive it like I stole it. 😎🤣

 

[joec1056]

Still no smoke! Now I'm dealing with the skid plate bolt holes being full of dirt... Pain! And I broke a bolt in one of the holes... Fun times!

 

[NTCPrezJB]

Still no smoke! Now I'm dealing with the skid plate bolt holes being full of dirt... Pain! And I broke a bolt in one of the holes... Fun times!

That's good news on the motor. Skid bolts...that's always a PITA.