Engine/Transmission (1994 - 1998) Oil Still Leaking Between Head and Exhaust Manifold

[Cummnzpowr]

Well, replaced the valve stem seals in #1 cylinder because it was leaking oil between where the exhaust manifold and head come together and burning about a quart every couple weeks or so. This didn't solve the problem, it still blows whitish-blue smoke coming off idle kinda bad and the leak is still there after the seals were replaced. What else could this be from?

 

[dpuckett]

Blown head gasket?



DP

 

[Cummnzpowr]

..

Why headgasket when it's not leaking from the head gasket?It's obvious it's internal pumping the oil out of the head... I don't know enough about that to say. . i hope that is all it is!

 

[WDimig]

if it were a blown headgasket, and it was using oil, your blowby would go up phenomaly, because your now pressurizing the crankcase way above what it ever will see with just some loss by the rings, if your headgaske was blow, you more than likely would see a coolant loss, or oil in the coolant vice versa, it's a pisssibility, have you pulled the exhaust manifold to see where it is burning oil??



wes

 

[Bob4x4]

did you check the valve guide for wear when you had the springs off?



Bob

 

[B.G. Smith]

With the mods you have and the mileage on the truck I would guess that what you are seeing is just unburned fuel/oil from the cylinders before the engine warms up enough to burn everything. Short trip driving would contribute to the collection of oil at the head/manifold connection and visible leakage. bg

 

[MPalachuk]

try switching the injector with a nother cylinder and see if the problem moves with the injector.

 

[Cummnzpowr]

Pics

Thanks for all your suggestions fellas. . you guys are very helpful! Here's a couple pics, sorry about the blurryness of them but this will give you a better idea of what i am looking at here. .



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[Signal73]

that looks like a bad valve guide seal, coupled with an exhaust leak... .

 

[WDimig]

i agree, i would reccomend having your valve stems looked at, could be slightly bent causing the valve stem seal failure. also get some new exhaust manifold gaskets from cummins, they are now multilayer, and they seal really good.



wes

 

[MPalachuk]

Has the blow-by increased? New valve seals should have made a difference, At leased for a couple of days if it was because of seals. Does it miss at start-up, Does it knock at all? Check into cutting the oil filter open and look for aluminum. Also try the injector swap.

 

[Cummnzpowr]

..

Blowby has NOT increased since the new valve stem seals, there really isn't THAT much blowby for that many miles on the engine. The engine quiets down once the oil pressure gauge comes up when bone-cold in the morning, almost as if there's a 3 second delay then the gauge comes up {you can hear ****.

 

[WDimig]

i would also cut open your filter and take a look, you can learn alot of what is going on inside your engine when you do that. cut the top off of the filter, pull out the media, using a razor knife, cut a rectangular portion of the media out, say 3"x 5", if you have a vice, take a bunch of rags, and squeeze the "accordian" looking media unit you get most of the oil out, unfold it, and look on the back side, if you se lots of little shiny particles, that not really good, it is sometimes hard to know when there is too much metal paticles there to know if there really is a engine problem, or if it is just normal wear, the best way i can describe it is, if there a few specs of metal here and there your probably ok, but if there is alot of metal or aluminum particles then that could be cause for concern. take a magnet and put it up to the filter material, and see of the particles are magnetic, that will tell you if it is a piston that your having truoble with, or vice versa. if you do find excessive metal particles in there, i would try and see if you can get your hands on a borescope, and look down the injector hole inside the combustion chanber and see if you can see any piston damage, or scratched or scorred cylinder walls. good luck with your problem.



wes

 

[B.G. Smith]

The valve stem seals could leak a small amount into the cylinder when the engine is off but when the engine is running there is pressure on the stem seals from inside the cylinder (turbo pressure) so leakage into the cylinder should be negligable. bg