This seems like a stupid question but I’m going to ask anyway. Did Lycoming ever have a service kit to put hydraulic lifters into the O-235? I’ve got a group of owners in a 152 Cessna who seem likely to trade back and forth on the oil changes and forget the valve lash check. They’re […]
How do I install an oil cooler on my homebuilt?
I have an O-235 Lycoming engine. The assembly case has not been drilled to accept an oil cooler. I called Lycoming Tech Service, but got no help. What needs to be done seems pretty clear, but I would like some technical advice. This engine is going on a homebuilt. GREY BIGGS via email I’ll apologize […]
Which valve is safe to use?
QUESTION: I have a question on my IGO-540-A1A, an engine with a rated RPM of 3,400. When it comes time for an overhaul, S.I. 1037K calls for intake valve LW-12949. This valve is prohibited from use in an HIO-360-D1A, an engine with a rated RPM of 3,200 by S.I. 1280C. The use of this valve […]
Prepare your plane for winter
For those of us who reside in northern climates, it’s time for us to begin thinking about what we need to do to get our aircraft ready to put in the barn for the winter. Certain recommendations also should be considered for aircraft that have less than regular use during the cold snowy months. The […]
Should I lean while taxiing?
QUESTION: I have had instructors insist that I lean the engine while taxiing my O-320 Lycoming. My current Citabria has a JPI 700 engine analyzer with fuel flow. In the testing that I have done, the EGT will change less than 20° and fuel flow less than 0.1 gallon when adjusting mixture at less than […]
Can you identify this engine?
QUESTION: A friend has an O-320 in his hangar. I have only the following data, and am wondering how or where I can use these data to determine exactly which engine this is. Data plate says: O-320, eng #2689-27. The case is cast with the number L-17001-27A. I tried using the Lycoming website, hoping for […]
Can I use a yellow tagged camshaft in my Wittman Tailwind?
I have a Lycoming O-320-D2A that will be going into a Wittman Tailwind. The crankcase and crankshaft are yellow tagged. The camshaft is really pitted and will need to be replaced. I imagine the followers will need replacing also unless refurbishing them isn’t a big deal. My question is this: There’s a possibility that I […]
What’s causing popping noises at low RPM?
I have a high-wing homebuilt aircraft into which I have installed an IO-360-A1B 200-hp Lycoming salvaged from a Lake Amphiban, with 660 TT. My problem is that it makes loud popping noises at low RPM, such as when landing or taxiing. I have a cross-over type exhaust, and have had a mechanic check both the […]
When should I achieve highest RPM?
I own a 1962 Piper Colt with a O-235-C1B engine. My operator manual says that I should have 115 hp at 2800 RPM. At what point would I achieve highest RPM? On takeoff? Level flight at full throttle? I never see that high of RPM even in level flight at full throttle. On takeoff, I […]