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Next weekend I’ll begin re-assembly. That shouldn’t take more than a week or two assuming I’ve got all the parts I need. The airplane is due for annual Jan 1st so while I’m installing the engine I’ll take care of that. I’m hoping to be flying by Christmas but it’s likely that it’ll take until...

Just an update, All of the parts minus the lifter bodies were repairable. After inspecting the cylinders, I found that they have low enough serial numbers to be affected by the AD for cracks, beyond that the valve guides are junk, the valves actually had guide material embedded in them. So I...

Read a little further down in the thread, it was talking to me. Fortunately I kept an eye on it and the crank was repairable.

Won’t know for sure until the machine shop says so

2k for crankshaft repair ≈ 1k for the main bearings, we’ll see but likely 2-3k to repair the case or replacement, call it another 1k in gaskets and misc, I’m going to overhaul the cylinders so that saves 4K ish right there. No labor because I’m doing it myself which helps. Haven’t gotten any...

“Fouled plug”

To keep everyone updated, I’m currently waiting on the crank to be repaired @ Aircraft Specialties. They need to re-plate the prop flange which takes 5 weeks by itself. 10 week turnaround all in is what I’ve been told. Outside of that, the case and lifters took a pretty bad beating. Plan...

Well… Yesterday I was changing my oil and I found copper… I removed the engine and tore it down (with the supervision of an IA that I’m working under) Center main bearing let go, case is scored on one of the cam journals, crank is within limits but it already has M10 bearings. Does anyone...

Just an update, we removed and inspected the oil pressure releif valve plunger. It looked a bit uneven at the mating surface where it rides on the accessory housing. We took a new one, lapped it to the case so the surfaces match eachother. Test flew it for an hour with a slightly richer...

Very interesting stuff! I appreciate all the information!

It definitely has the vacuum pump, I haven’t seen that before but I’ll have to do some reading!

It has a DG and AI that are both vacuum driven, however I don’t recall ever seeing a vacuum pump on the engine.

Do you happen to have any pictures of what this installation looks like?

One other thing I failed to mention, we manually blocked the oil pressure relief valve and cranked the engine with the mixture out to verify that the pump was building adequate pressure. It almost immediately made 60psi so we know for a fact that the pump makes plenty of pressure.

This would only manifest itself in an external oil leak as well as the pressure readings correct? Other than that I’d need to pull the kidney and closely inspect where the case meets the crankcase right?

I’ve never ran the engine with the old accessory case in it, the previous owner mentioned the priming issue when I went to buy it, I was unable to get it to prime just cranking with the mixture pulled out so we started investigating before we caused any additional damage.

We are running Phillips XC 20w50. I have a case of straight 100w on its way as I’ve seen some say it makes a noticeable difference. I’m a bit skeptical as SAE50 is SAE50 regardless of whether it is a multi grade or not. But we’ll give it a shot. I like the idea of running an oil filter on it...

Field elevation is 3550

That’s a fact!