What was found
(CAN) ON TAKE-OFF THE AIRCRAFT WOULD NOT DEVELOP FULL POWER SO THE PILOT ABORTED THE TAKE-OFF. AIRCRAFT WAS BROUGHT INTO THE HANGER AND AME'S REMOVED COWLING AND REMOVED VALVE COVERS. IT WAS NOTED THAT ALL THE CLEARANCES ON THE VALVES WERE TOO LOOSE. AIRCRAFT HAD A NEW ROLLER LIFTERS AND CAM INSTALLED IAW STC SE 03-3 ONLY 24.0 HRS BEFORE BY AN APPROVED ENGINE SHOP. ENGINE SHOP WAS CONTACTED AND THEY CONTACTED OWNER OF STC. OWNER OF THE STC WAS CONTACTED AND THEY REQUESTED THAT THE ENGINE BE SHIPPED TO THEM FOR REPAIR. (TC NR 20060530006)