Oil leaking thru carb and air filter...or is it gas?
Posted October 15, 2011 - 02:52 PM
I've got oil leaking thru the carb and air filter...at least it looks like oil. Engine runs fine & it doesn't smoke at all, so I'm questioning if it is actually oil, or maybe some upburned gas/ethanol.
Anyway, I discovered some other issues while I was in there looking.
1, the spark plug loosened, I guess from all the bouncing around and tilling. I imagine I lost some compression--would that in any way cause oil to come thru the carb and air filter?
2, I got a leak that seems to be originating from the bolt on top, the bolt beside the spark plug, and leaking onto the top 2 or 3 cooling fins.
Would this indicate a gasket issue of some kind? Could this and the oil/carb issue be related?
I know, I got some issue here and variables I need to eliminate.
I already tightened the spark plug and will clean the carb and see where that gets me.
Any other suggestions/ideas/solutions?
Posted October 15, 2011 - 02:57 PM
Might be the vent/valve cover behind the carb that is leaking the oil.
Posted October 15, 2011 - 03:31 PM
Edited by kiddpitt, October 16, 2011 - 05:59 AM.
Posted October 15, 2011 - 03:44 PM
Posted October 15, 2011 - 03:51 PM
- dstaggs said thank you
Posted October 15, 2011 - 06:36 PM
Posted October 16, 2011 - 08:43 AM
Just to clarify, a small amount of oil is coming from the green circle, but most is coming from the red circle. The higher the throttle, the more oil comes from the red bolt. None from the blue area. Still evidence of a head gasket issue, or could I relube these bolts for a better seal?
Also, I've learned to start with the simple and work towards the hard, so I ran carb cleaner thru with the gas this morning...no leaking thru the carb and air filter.
Also, would a head gasket leak, or oil thru the breather tube show on the spark plug? I read the plug and it's fine, just as it should be, no evidence of any problems.
I'm not disagreeing with anything anyone has said, I just want to fully diagnose my problem before going into to make repairs. If this picture is all the evidence of a head gasket leak, that's what's getting fixed! Thanks guys!
Posted October 16, 2011 - 09:04 AM
Posted October 17, 2011 - 10:12 AM
Posted October 17, 2011 - 11:21 AM
I'll post some pics of the carbon buildup when I get home this evening and some pics of the air filter area, because I can't seem to find the breather tube.
Also, I got a copy of the service manual and taking the head off is regular maintenance anyway (every 500 hours)....so I'm actually kinda glad this happened!
Posted October 17, 2011 - 04:10 PM
Here's the carbon buildup. I guess I'll be checking the timing, carb adjustment and spark plug (which looks good). Is there anything else that can cause this?
Here's my carb and air filter housing. From the diagrams I've seen I was expecting the breather tube to attach to the back of the filter housing (the round blue piece on the left). Am I wrong?
I ordered the genuine Kohler head gasket today.
Posted October 17, 2011 - 04:48 PM
Posted October 17, 2011 - 06:16 PM
Posted October 31, 2011 - 11:33 AM
I replaced the head gasket and fixed the timing. I still had some leakage, though not nearly as much. Yesterday I replaced all the gaskets on the air cleaner side of the engine. I'm going to run it when I get home from work to see if I've finally solved everything, I'll also do a vaccum test to see where that's at.
Thanks again everybody for all the help.