Barry Dunmire 1 #1 Posted July 23, 2023 Newly rebuilt engine blowing oil out the valve cover vent hole, is too full of oil or is it the breather assembly? Share this post Link to post Share on other sites
oliver2-44 8,877 #2 Posted July 23, 2023 Checking the oil level is the easy place to start. But I would suspect the breather is installed incorrectly. If I remember correctly the Kohler manual has a good diagram of how it should install. 2 1 Share this post Link to post Share on other sites
wallfish 15,959 #3 Posted July 23, 2023 Could be either. Over full is easy to determine The breather reed valve needs to be installed properly 2 1 Share this post Link to post Share on other sites
wallfish 15,959 #4 Posted July 23, 2023 If oil starts leaking from the governor shaft too, that's a sure sign of too much crank case pressure and the breather valve installed incorrectly is the most common cause of that condition 5 1 Share this post Link to post Share on other sites
squonk 39,011 #5 Posted July 23, 2023 Who rebuilt the engine? Ring gaps all lined up will cause this also. 2 Share this post Link to post Share on other sites
Barry Dunmire 1 #6 Posted July 23, 2023 21 hours ago, oliver2-44 said: Checking the oil level is the easy place to start. But I would suspect the breather is installed incorrectly. If I remember correctly the Kohler manual has a good diagram of how it should install. You were correct, breather installed incorrectly, thanks for the help Share this post Link to post Share on other sites
Barry Dunmire 1 #7 Posted July 23, 2023 You were correct, breather installed incorrectly, thanks for the help. 1 Share this post Link to post Share on other sites
moe1965 723 #8 Posted July 24, 2023 Just curious which way does the breather face. I just removed mine on my 8 hp and the little hole to drain oil was on the top o assumed it was install the wrong way and put it on the bottom. Also I believe the reed is correct the round hole was facing the engine and the reed thin strap or metal was facing the outside 1 Share this post Link to post Share on other sites
