# Lycoming O-360 case question

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#### DaveK

##### Well-Known Member
An A&P friend of mine just gave me most of a O-360 and the case is a bit odd and I was wondering if anyone knew anything about it. The engine data plate is labeled O-360 C2C, 180 hp. The question is the mounting points on the case are straight drilled through (i.e. parallel with the crank) but not machined for conical mounts as the C2C designator would indicate. So whats up with that? And does anybody do the machining to put the correct mounting there or better yet mod to dynafocal?

Easy come, easy go, so if the case inspects as bad or whatever I won't use it, but would be nice to.

Thanks,
Dave

#### wally

##### Well-Known Member
Looks like from this article it supposed to have straight (conical) mounts.

List of Lycoming O-360 variants - Wikipedia, the free encyclopedia

Just follow the "same as ___ except for" back a couple of levels and you will get back to where it is like an engine which has straight mounts.

If you give DivCoInc. about $850 they can probably make it a good case. They did my O-320 case and it came back beautiful for that amount of$\$. It had fretting wear and the old style non-adjustable oil pressure regulator. They faced each case half and line bored the main bearing saddles. And they put sleeves at each of the main bearing saddle bolts - a mod they own that prevents fretting wear of cases. I think I also had to buy another oil pressure regulator since they went ahead and modified my case for the new type.
DivCoInc.com - Welcome to DivCo, Inc!

If you want a dynafocal type, they may be able to convert it, or have them buy your case or possibly trade with you.

Wally

#### DaveK

##### Well-Known Member
But that is the thing, the bolt holes are straight like a conical mount would have, but the cone shaped cupped areas for the rubber isolators aren't machined in, its just flat on both sides. The mounting points are as thick as the conical mounting points but aren't recessed for the isolators.