hammdo

Here is a pic of the different types - original, DLC (Diamond Like Carbon), Rollers: -Don

Those are the original ones from 1996 when it was a Lycoming factory overhaul. I looked at them and they are not DLC lifters. I also looked at the last IRAN (in 2006 from gear up) and they resurfaced those lifters/cam followers. When I got the DLC lifters, you could tell the difference. My guess those are just dark from use. The faces are very light color vs the DLC one which are very dark/black faces. -Don

I thought I posted but, Edge Aviation (2F7) in Commerce does mine. Brad is the contact. I’m also hangered at Mesquite… my plane is there now… -Don

Edge Aviation in Commerce (2F7) - they don’t travel. They do mine. ~$350-$500, Ask for Brad. Mine is there now for annual, IFR cert, and engine IRAN (spalled lifters/cam). I’m also hangered at Mesquite… -Don

What they found on tear down: Spalled lifters happen in the last 60 hours. Last year when we did the #4 cylinder, we saw nothing on the faces/cam. 821 hours since the last IRAN - this is the current condition. Basically, No NDI (non destructive inspection), and no crank polish/line boring will be done. -Don

Tear down completed. Crank good, gonna freshen it up with new bearings, rod bolts, lifter plungers, 1 pushrod need’s replacing. Lower mount bushings need replacement. Goes to show things can happen even when maintenance is constantly being done. We talked about doing the full OH but 3 to 6 months out and she won’t be hangered. I think just doing the IRAN is best for now. It will be as fresh as one can get. -Don

No, never really had ram air for the carb version. -Don

Almost 7800 hours on my C - never a trainer… -Don

Parts dropped off, had a chance to speak to the APs. They both agree that the lifters must have failed -- intake side. Exhaust showed no signs of issues -- just very odd but not surprising. Engine is already off, AP is gonna mic the crank and if that is ok (which we don't see a reason why it wouldn't since we caught the metal very early), the IRAN will proceed. She's naked:

I was hoping something like this would have waited a bit longer. I’ve been saving for a big hit but it seems when I go off plan (like leather yokes or autopilot), that is when an event happens. IRAN will freshen things up. I’ve pretty much have done all the other Items as I went along (progressively trying to be ahead of maintenance where it makes sense). I’m just glad I can do this much now. Bottom end should be good, basically new top end. If all goes well, I should still have leeway later to get the AeroCruze installed. Parts go to the shop tomorrow. The AP/IA doing the engine IRAN has decades of experience (semi-retired last year), has built 3 experimental aircraft (and is building one now), and offered to do this for me (5 years I’ve been going to them). The other AP/IA (who bought the other out) has lots of experience too - but likes to do avionics ;o). Thanks for checking in! -Don

FYI, since the re-org of Superior, they have on shore manufacturing with their subsidiary: https://superioraerospace.net/ I sent an email about where their products are now being machined (after the re-org) and Superior was kind enough to give me the details. So Superior Aerospace does the manufacture and partial assemblies, while the Dallas (Coppell) Location does the rest. I live a few miles from their Coppell location too ;o) -Don

Whew, rest is finally in! Will be taking to shop tomorrow. Will get an idea of timeframe and if the shop needs anything else… She should be in much better shape after this. DLC lifters are nice… -Don

I believe it is a late 1961 model (Dec 61?). A B with all the reductions to make it a C — and I believe 48 gallon capacity… I can’t imagine the exhaust made that big of a difference something but sure did… Damn fast for sure… -Don

Same as Richard - rolled on: -Don

25 sq no wind on my C - but I have speed mods:

Shipment #1 came in -- Millennium Cylinders, piston pins, alt belt. Shipment 2 is delayed due to the snow storm but hopefully will be here on Monday or Tuesday. The 4th cylinder etc. is already @ the shop since we thought it was the cylinder initially based on borescope. -Don

Finally a new video! thanks for posting! -Don

Yep, sure did… -Don

Interesting quote from Aviation Consumers on Superior’s cam: "Presently, there are three aftermarket camshaft providers: Air Support International was the first company to develop and certify an aftermarket camshaft, followed closely by Engine Components Inc. and Superior Air Parts." "If the cam wont grind and needs to be replaced, there are three aftermarket manufacturers to choose from, plus Lycoming and Continental. For some engines, an OEM cam will be the only choice because it isn’t provided by the aftermarket. Otherwise, of all the cams weve seen, were inclined to favor the Thielert-built Superior products, simply because we've seen how obsessive this company is about manufacturing quality control." https://www.aviationconsumer.com/aircraftreviews/engines/the-camshaft-coin-flip/ -Don

Oil cooler was new (installed in 2016 I think) with new hoses so getting those flushed. New alternator belt too. I think the important items will be covered…. -Don

Thankfully everything was in stock and shipped today. Cam and DLC lifters should make this a more reliable engine… new cylinders will be awesome… -Don

After long discussions with the shop and a very good friend who is an AP/IA, I’m going to do cam, DLC lifters, all new Superior cylinders, new mechanical fuel pump, and IRAN the engine (OH gasket kit). I was very lucky all parts were in stock and should be here in a few days. Shop is in progress with the removal etc. All accessories were already overhauled or replace within the last 200+ hours (mag, SureFly, exhaust), Prop/Governor IRAN/reseal 200 hrs ago. Alternator’s oh 200 hrs ago so not a lot left there. Fine wire plugs with 250 hrs, new harnesses when mags/SureFly done… won’t have to wait long since the shop is on it… -Don

Me too but it may be a blessing to have caught it really early… -Don

Yep, pulled #4 to replace it since borescope showed rough cylinder…then found that… (autocorrect….:o( -Don

Happened fast too… -Don