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overhaul
if you read my posts on the tpic, they ar a few months old...so pretty recent info. but to summarize:
My engines are TSIO-360AB (turbo), so costs will be a about 5Kish more than normally aspirated, assuming you do turbos at same time as rest of engine which is normal
You mention pitting, but what are the compressions? If compressions are still good, then maybe you can squeak out some time from them...also check closely for large chunks of metal in oil.
Total hours on the plane or engines is less important to how much they are flown...a plane with low hours that just sits will have more need for overhaul earlier than a high time engine which is flown often.
on costs...just did mine, and had almost everything go wrong that could go wrong...total with labor and parts to get off, overhaul all, and accessories, and put back on - just under $50K
factory reman costs were going to be around 38K, but they did not include turbo. so I went with third party (and was very happy with their service). In hindsight, I would have done the reman, because supposedly they do not reject a running engine core for any reason. By using third party, I had a number of high cost rejected items, like the crankshaft.
I would also recommend going with all new cylinders, camshaft, crankshaft if this is first overhaul in many years. it will give more peace of mind.
my guess is that you are looking (USD$) at around 40K per engine all in, but might be as low as 30K depending on the route you take...
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