H

Hack

Active Member
I have an engine that, upon tear down, will need new bearings and a crank ground to -.003. In your opinion would you have this work done by a company who does engine work every day (Mattituck or similar) or would you feel comfortable with an A&P who does engines every once in a while?
Thnx.
Hack
 
Which one is more likely to give you service after the fact if you need it?

Which one would you give to your kids to fly behind?
 
Replacing bearings? not a huge deal. Grinding a crank? have you sen the price of a new crank? I'd have it done by a shop that does it all the time. But then again, Mattituck probably doesn't do them - there are dedicated machine shops that bore cases, grind cranks, etc that everybody uses.If your mechanic is going to send it to one of them, then it's the same deal.

Paul
 
Which one is more likely to give you service after the fact if you need it?

Which one would you give to your kids to fly behind?
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I kinda resent that. In fact I really resent that. Who would you rather have repair your Stradivarius? A master luthier who works part-time or some dude on the assembly line cranking out Ibanezes. Many A&P's have great competence and skill. Give them a little respect, please.
 
Personally

I don't think Greg meant his comment as disrespectful and I didn't take it that way. Simply do you want someone who specialises in engines doing the job or the guy with the same qualifications but is a generalist?

I also think that assembling an engine is not that hard to do. The crank and cases are going to be sent out to a machine shop for magnafluxing, line boring and grinding..Thats where you want the specialist.

I'd have my local A&P assemble my engine any day. But as I like building things I'd have him watch me do it.

Frank
 
crankshaft

The Lyc cranks are not ground to .003 under, they are POLISHED. Generally the well known engine builders do not do major crank or case work in house but send them out. ASI??? in Tulsa is the popular place for cranks, I think Rick Romans also. Probably a couple others in Tulsa area. I can find the contact info if you need it. The full overhaul on the crank would include magnaflux, flange runout check, strip and replate the flange and do the 505 inspection if applicable.
 
crank

aircraft-specialties.com, complete price list for all the work they do. A complete overhaul on the 4 cyl lyc crank is $425. This includes renitride, which I believe is only necessary for a .010 under grind. 800-826-9252
Rick Romans 918-835-1311
 
<shrugs shoulders>

God didn't put me here to be politically correct and make everyone happy.
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Me neither, but it came off like you think an A&P isn't capable of stacking an engine correctly. True, some aren't but there are a bunch of A&P's on this forum and I bet they know whether or not they should put together an engine themselves. Some of them have actually managed to cobble up an engine and give a kid a ride. OMG!
 
aerhed said:
Me neither, but it came off like you think an A&P isn't capable of stacking an engine correctly. True, some aren't but there are a bunch of A&P's on this forum and I bet they know whether or not they should put together an engine themselves. Some of them have actually managed to cobble up an engine and give a kid a ride. OMG!
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I believe that they are talking about the capabilities of an A/P to be able to regrind/rework the crank and not engine assembly. I don't think that there are too many A/P's out there with the equipment, nor the expertise needed to rework a crankshaft. Like others have suggested, Aircraft-Specialties Services does this and at a great price. That's where I sent mine.
 
aerhed said:
Me neither, but it came off like you think an A&P isn't capable of stacking an engine correctly. True, some aren't but there are a bunch of A&P's on this forum and I bet they know whether or not they should put together an engine themselves. Some of them have actually managed to cobble up an engine and give a kid a ride. OMG!
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3 points here.

First, I never said an A&P wasn't capable of stacking an engine - they certainly are. The OP was asking about grinding a crankshaft - and that's a completely different animal.

Second, the OP was asking for OPINIONS concerning his question. If you didn't like mine, please feel free to offer yours - but don't be hating on me for mine.

Third, if you'll go back and read my first post in this thread, you'll notice that I did not even offer an OPINION (and still have not) - I merely offered two questions that the OP might want to consider to help him make a decision.
 
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