Oil in the induction manifold, ideas?

[3dbuster]

Hi Guys,

I am 2.7 hours after a top overhaul on our Lycoming IO360, still running it in. 4 new pistons, new rings, new rockers. One new intake valve and all other valves were checked. However, no valve guides were replaced.

Earlier today I took the manifold off after I found oil on the bottom of the aircraft, which dripped from the throttle body. See pictures attached

Anyone had this before and can provide additional information about issues with the valve guides can result in this?



Many thanks,

 

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