Workhourse Is Smoking

CreeBo23

So I took my cart for a long ride yesterday. I went down a long hill and when I got to the bottom and the engine started pulling again it smoked a good bit. Toward the end of the ride I was coming down a rough hill. So I was basically giving it a little gas then coast, little gas and coast. When I reached the bottom and accelerated I had a ton of blue smoke coming out for two or three seconds then no smoke. It has always smoked a little bit but I had always figured it was my unclean engine. Now that its clean the smoke I'm seeing is coming from the exhaust. I changed the oil two or three weeks ago and the oil level is perfect. Not too high, not too low. Any ideas guys?

BGW

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pizzamaker

sounds like valve guide seals, when your spinning the engine with the carb closed it builds more vacuum in the block, pulling oil passed the seals. something you see with a worn car and truck engine with a stick trans, you see a puff of blue out the tail pipe when it shifts

ruredy

run it till you can't stand it any longer then rebuild or swap it for a rebuilt. I had a 97 workhorse was like that when I bought it, It lasted for better than a year before I replaced the engine. The cart ran great but smoked some, would do the same thing on the downhills. After a good year of abuse it got to smoking all the time (was like a fog machine) and I finally swapped in another engine. I would of done it sooner but I had other carts and I needed somethine to keep the skeeters down.

CreeBo23

So is this something that can be repaired or just chock it up to an old engine?

pizzamaker

like ruredy said just run it, it may run for years like that! more than likley in time you will want to go to a bigger engine anyway

CreeBo23

Sounds good to me. I just hate having to pull the **** engine again. I've done it like 5 or 6 times now and it always seems I pull it to fix one problem and create another

ruredy

When you first replaced the piston/rod did you hone out the cylinders and re ring the pistons?

CreeBo23

When you say "hone" I'm assuming you're talking about having it bored out. No I didn't do that. There was no damage to the sleeve where the piston head goes so I figured I was okay.

ruredy

honing is to break the glazing on the cylinders so rings will seat and make a good seal. it would have been a good time to do that with the engine apart and all. there's really no chance of putting the rings back in the cylinders and having them be in the same place they originally seated. The cylinders walls get oiled by oil slinging off the crank, on these engines both pistons move together, when they rotate down it creates pressure in the casing, if your carb is closed off a vacuum is created above the piston, any oil that is on the cylinder walls will get sucked up passed the piston if the rings aren't sealing off properly. If your rings don't seal off this effect is magnified because of the valve timing, just as the pistons start their downward stroke, the case is already somewhat pressurized from the compression blow-by of a compression stroke. It kinda makes a steady stream of air blowing out the pcv which is why they blow oil out that line and into the breather.

CreeBo23

How do I hone them? Or do you think doing that now would be a waste of time? And would I be losing power from this?