What parts can I use in my 1955 engine?

Posted on May 18th, 2007 by

My 1955 Tri-Pacer original Lycoming O-320 engine was torn down and inspected. It has a Part No. 74166 camshaft gone bad (#3). I found a P/N 76097 camshaft. Is it OK to use this part number for the engine? Continue Reading →

Confused about replacement parts?

Posted on May 4th, 2007 by

Q, I have a Lycoming O-320 150 hp engine with no suffix in my PA-22 Tri-Pacer. In one of your articles you list the O-320-A1A and the O-320-A3A as the numbers to refer to for replacement parts. Lycoming does not... Continue Reading →

The XR-7755: The whole story

Posted on April 20th, 2007 by

I was reading about the XR-7755 on the Internet and was wondering if you would clear something up for me. Most sources say there were two engines made, but I’ve found there were three versions. The first was set up... Continue Reading →

Can we convert from dual mag drive to separate drives?

Posted on March 23rd, 2007 by

Can we convert a Lycoming O-540-J3A5D from dual mag drive to separate drives? Can it be done on a 1980 Dakota 236? Continue Reading →

Confusion abounds on difference in rocker arms

Posted on March 9th, 2007 by

I’m confused about the rocker arm differences on the O-360-A4K parallel valve cylinders because I know about the extreme heat that the exhaust valves endure. Continue Reading →

Can I install a constant-speed prop on my engine!

Posted on February 16th, 2007 by

I have a Lycoming O-360-A3A in my Cherokee. According to the Type Certificate Data Sheets (TCDS), this engine is similar to an -A1A, except without provisions for a constant speed prop. Nevertheless, it is equipped with a hollow crankshaft, and... Continue Reading →

EGT: What’s normal

Posted on February 2nd, 2007 by

I own a 1974 Grumman AA-5, SN550. Last winter I had the engine (O-320) rebuilt. I have a question about EGTs. Continue Reading →

Are dual mags reliable?

Posted on January 19th, 2007 by

I own a Cessna R-182 that has a Lycoming O-540 J3C5D engine. It seems like a great engine and runs well. I have a concern about the “”dual-pack”” type magnetos that run off a common gear. Yesterday, another pilot told... Continue Reading →

And now, the rest of the story: An update on increased levels of copper in oil

Posted on January 5th, 2007 by

After my Nov. 3 column, “”Why are there increased levels of copper in my oil?”” was published, I received some valuable advice from industry experts on the subject. Continue Reading →

Where are the expert answers? Unhappy reader tired of being told to “”look it up””

Posted on December 1st, 2006 by

I am having a hard time finding any usefulness in your column. People ask specific questions and you tell them to look it up. As a reader, I would like to see some sort of expert answer to their questions.... Continue Reading →