THEGunboundGod

So there's sludge inside the tailpipes.. is that cause oil is burning in them? Is there an inexpensive solution to stop this?

Shadow Z

iTrader: (2)

It's most likely just carbon build up. Try Sea Foaming your engine, and run lower octane gas, incase you're running any higher than 87. A bad catalytic converter could also be the cause.

V6F1R3BRD

Dunno if it could be related.. But i get water in my muffler for some reason..

BlueIroc-Z

iTrader: (6)

Main products of combustion are CO2 and H2O (water). Some of the water vapor in the exhaust stream will condense inside the cooler muffler housing...

Unless you have a bad head gasket that lets coolant into a cylinder...

With regards to the OP, perhaps your "sludge" is just carbon build up like the other person said that has gotten wet...? I would think that if you were burning enough oil to have sludge in the tail pipes there would be blue smoke as well...

THEGunboundGod

I burn unleaded gas, there's always tons of white smoke but it doesn't have the sweet smell like coolant, and the 305 burns oil pretty fast.

Shadow Z

iTrader: (2)

I hope you're running unleaded gas, there's been a ban on leaded gas for quite some years. Every single drop of gasoline that I've ever bought in my lifetime has been unleaded. Anyone born after 1975 will also tell you that.

Leaded/unleaded is not what matters though. The octane rating of the gasoline you buy is what matters. Octane is a hydrocarbon, and it is common knowledge that carbon is not flammable, that may be the cause of your sludge problem if you are running higher octane gasoline. The hydrogen in a hydrocarbon, better known as octane, is flammable, but the carbon? Nope, it may very well be contributing to your sludge problem.

Then again, you could be running rich, possibly your timing is off too, that may contribute to gasoline not being fully burnt, leading to carbon build up.

BlueIroc-Z

iTrader: (6)

If carbon is not "flammable" then how do you explain CO2 as a combustion by-product of any carbon-containing fuel? The carbon in a hydrocarbon combines with oxygen during the combustion process to from carbon dioxode (CO2) while the hydrogen combines with oxygen to form water (H2O) as mentioned in my first post.

Octane is simply a hydrocarbon molecule with 8 carbon atoms. The "octane" rating is used to place the detonation characteristics of a certain grade of gasoline on a scale where iso-octane is 100 and heptane is 0. Gasoline itself is made up of a range of different hydrocarbons.

Here's the Wikipedia articles on octane ratings and the combustion process.

camarokracker

iTrader: (1)

Ok.. since were all throwing ideas out here....

I too had sludge in my tailpipes and actually tried for over a year to find the problem. Then..... I pulled a valve spring...

I wish i had pics but i dont so anyways here was the problem, The valve stem seals were not staying seated at the base. The oil was getting sucked past the valve and considering i found this on all my exhaust valves it was sucked right into the header and combined with the little but of carbon buildup in the pipes and ..... VIOLA!!! SLUDGE..

I hope this helps since i know how frustrating that problem is. I changed all my valve stem seals and no longer have any oil in the pipes.

Shadow Z

iTrader: (2)

Somehow this post got edited, and it removed everything.



I knew someone was going to reply with some BS that is mis-information, or what I already stated. I really suggest you read my post again, I'm well aware of what "octane" is, so there's no need for childish lessons here.


"The octane rating of the gasoline you buy is what matters. Octane is a hydrocarbon"

Thanks genius, for saving the day. Wikipedia articles on the "combustion process"? Who are you kidding? Take your elementary lessons elsewhere, you're simply typing what I already stated. Good luck with that.

By the way, let me add an edit, to show you just how wrong you are, in Elementary style, of course! Lets see, dough is made from flour, water, eggs, salt, and butter, sometimes more random ingredients are thrown in there. But tell me, when making dough, do you take a blow torch to it, for it to mix? I'd hope not.

The Carbon in Octane is not flammable, if it were, there would be no such thing as CARBON DIOXIDE. That Carbon element is still present. I'm well aware that some elements in the Carbon group are flammable, but not the Carbon in Octane, that extra Carbon in higher Octane Gasoline is what promotes the ability to resist detonation.

How else would you create a slightly denser Gasoline that is able to resist detonation, while adding more flammable elements? Wouldn't that defeat the purpose, and make the Gasoline just as combustible, if not, more? I'm afraid so.