Video of the smokey K321

[ajs96]

Originally Posted by Merk

My Son and I watch the video several times. The head gasket is blowed and causing the ticking sound. When the motor revs up you can see the smoke come out the front of the motor towards the muffler.

Did you measure the crank and rod journal when you removed the piston?
What was the measurement and what tool did you use to measure it?

Best thing to do is take it to an automotive machine shop that has the correct tools to measure it.


I have two K321s with cylinder resleeve. Both are strong runners.

I think i will look further into the sleeve option if i can find a shop anywhere near me to do it.

I've got precision calipers, just not the correct indicator tools for the bore. The crank was fine and the specs with within normal limits for a non-ground journal.

When i was taking the balance gears out (was forced to) i noticed what had to have been too much end play in the cam, haven't read up on that too much but i am nearly certain that's where the more serious sound noise was/is coming from.

The smoke you saw was from about 100 little holes in the muffler shooting smoking oil back onto the block. The tapping is defintely a mechanical noise in the valve train.

See the below video i took earlier this evening. (edit: i need to point out that after compressing the video to upload that it makes the valves look completely off timed and all over the place, that's just a visual effect of not even enough frames per second)

VIDEO:

[Matt G.]

You cannot use calipers to measure a piston or bore, or anything in the engine, for that matter...you need a micrometer.

[ajs96]

Originally Posted by Matt G.

You cannot use calipers to measure a piston or bore, or anything in the engine, for that matter...you need a micrometer.

I suppose i did not use the proper terminology, it's digital and measures to the 1/10,000...cut me break aerospace industry man

[Matt G.]

I just wanted to make sure...I wouldn't want to see you or anybody else get led astray by using the wrong tools to measure something and then consequently making the wrong decision.

[Mizar N68X]

First of all let me say I know nothing about the Kohler one lung engine.
That is to say I have never had one apart.

I have to agree with Merk though.
A blown head gasket will sound like rod knock.

I do not see that much smoke from the muffler.
It looks like the smoke is comming from the side.
Did you install a pan gasket when you put it back together?

[ajs96]

Originally Posted by Mizar N68X

First of all let me say I know nothing about the Kohler one lung engine.
That is to say I have never had one apart.

I have to agree with Merk though.
A blown head gasket will sound like rod knock.

I do not see that much smoke from the muffler.
It looks like the smoke is comming from the side.
Did you install a pan gasket when you put it back together?

Guys, i assure you that the properly torqued, new head gasket and verified flat head was not leaking and that the muffler is literally soaked in oil and oil is actually dripping down the side of the holes where it's rusted out. It was so bad that i had to clean the garage wall where the muffler was blowing oil on it from 6 feet away. Also, the compression was so bad that a good portion of the combustion gasses were being blown into the crankcase and out the breather

All gaskets were present.

If you look at the video i posted in my last reply, you'll see the motor turning over with the head off and still making lots of noises, both from the top and low end.