Re: Kohler K321A engine

Posted by Jim S. on March 28, 2000 at 10:36:57 from (206.166.233.10):

In Reply to: Kohler K321A engine posted by L. Anderson on March 27, 2000 at 09:57:07:

First rule of mechanics: Check the easiest thing first.

Take off your carb, and then your breather cover. Place each piece on the ground in the order you take them off, so you will get them back in the right order. Under the cover is a recessed metal piece that the breather reeds operate in. At the bottom of that piece is an oil drain hole.

Is it clogged? If so, tah-dah!

Second easiest fix: Are the reeds bent/broken? The reeds are a blued metal strip at the back of the recessed piece under the cover. They need to seat over the holes and seal them as the piston goes up and creates a crankcase vaccuum, preventing oil from being splashed up into that cover area by the rod. If they are bad, it'll pump oil out the cover.

Third easiest: Has the cover been removed by some shoddy mechanic? If so, things may be in the wrong order. Is the drain hole at the BOTTOM of the recessed piece the reeds sit in? If it's at the top (piece in upside down), oil will build up and TAH-DAH! Are the reeds in the back of the recessed piece so that they can seat properly over the holes? Is there a piece of fuzzy filter material in there, made of jute? It's a rectangle, and should be placed long side vertical so it covers the breather vents on the cover when assembled. Is it missing or worn out? They are cheap to replace.

Get a Kohler manual and put the pieces in right, by the illustration, if you find they are not in properly or some are missing.

This inspection is easier to do than to describe. Just remember to put yer parts on the floor in the same order they come off. Do this first before spending a ton of money and wasted time on other, more complicated causes.

If this inspection shows everything OK, then you can move on to blowby, etc. But I would bet your problem is right under that valve cover. Even engines with severe blowby won't pump oil out that cover if the stuff is in there right and not broken.

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