Hi All,
I have a core 0-320 E3D from a 1978 Beech 150 that my A&P and I rebuilt.
Divco yellow tagged all the case work. Aircraft Specialties did the Crank, Cam, tappets, lifters, socket, push rods, rocker arms all yellow tagged. Purchased 4 new Lycoming cylinder assembles from Aircraft specialties.
All intake clearance are about mid .50, perfect with -13 or -14 pushrods.
All Exhaust clearance were over .150 with a correct range of .28-.80.
Sent the exhaust rocker arms back to Aircraft specialties to find 4 with a larger toe left after grinding. The exhaust arms have the oil hole in them.
Small improvement.
Bought the longest push rods the -15 and improved to about .110 clearance.
Lycoming recommended buying new rocker arms.
Aircraft specialties was nice to let me borrow a new rocker arm to check clearances. Improved to .100 clearance.
Checked with Lycoming to be sure I have the correct cylinder and I do.
Again, just the exhaust clearance. Thoughts? Had 3 A&Ps just shaking their heads.
Thanks,
Mark
I have a core 0-320 E3D from a 1978 Beech 150 that my A&P and I rebuilt.
Divco yellow tagged all the case work. Aircraft Specialties did the Crank, Cam, tappets, lifters, socket, push rods, rocker arms all yellow tagged. Purchased 4 new Lycoming cylinder assembles from Aircraft specialties.
All intake clearance are about mid .50, perfect with -13 or -14 pushrods.
All Exhaust clearance were over .150 with a correct range of .28-.80.
Sent the exhaust rocker arms back to Aircraft specialties to find 4 with a larger toe left after grinding. The exhaust arms have the oil hole in them.
Small improvement.
Bought the longest push rods the -15 and improved to about .110 clearance.
Lycoming recommended buying new rocker arms.
Aircraft specialties was nice to let me borrow a new rocker arm to check clearances. Improved to .100 clearance.
Checked with Lycoming to be sure I have the correct cylinder and I do.
Again, just the exhaust clearance. Thoughts? Had 3 A&Ps just shaking their heads.
Thanks,
Mark