6076 John Deere Engine Block Machining - Lower Bore Repair Sleeves - Deck Resurface 

Very good teamwork between them too

It really is with todays throwaway style

Kind of wish you old f's would kick off.

I've noticed that anytime I have an engine with a internal issue at the shop I recommend depending on the failure to take it to the machine shop but usually they just buy a used engine to install

haha Thank you! Glad you found us! The RU-vid is starting to take off, so I definitely feel more motivated to make the longer videos ;). Gonna try for at least one a week!

They have something called a coaxial indicator that you can put inside of a spindle with a Chuck and it does the same thing

Colorado! Thank you 👌🏻

Yes. Deere sells it, and I'm sure other manufacturers do as well.

I had a 1977 Monza Spyder it was a OG 305 but the guy I got it from put a 400 in it LOL!! I just ran across your comment and I thought it was funny that you noticed the Monza like I did and owned a 77 with a V8 like I did LOL!

@@79tazman Yeah! I Loved my Monza! My dad had an old 65 chevy pickup truck with a 283 in it. When I was a junior in high school I pulled the engine and rebuilt it and picked up a beat up monza with a v6 and did the swap. I used the 4 speed that was in the car. It was my first car I drove on the road. Later on I had a 79 with a v6 and 4 speed. It was in much better condition than the first one I had. Great little cars.

Shims

Sure, it does shorten the block deck height. That is why manufacturers specify how much you are allowed to remove. Sometimes a junk block can be saved by using a thicker head gasket.

It's too bad some genius decided we didn't need to teach this in school anymore, we had a VOTECH program in high school (1983 bwhahahahaha old people) Welding, Machining, auto mechanics, carpentry. you may be able to find a community college with courses, I hope you pursue it.

Yep! I would love to have one of those new fancy CNC hones, but the CV616 get's it done for now!

@@JAMSIONLINE Heck I consider the CV616 a fancy hone. LOL Have a friend still using a CK10! Good work BTW

Putting the rings in a freezer to shrink them, then they fall right in.

No.

Yes... All good points, and yes I sort of "skim" over it, as getting too technical on a subject like that can make it less interesting to the typical viewer who doesn't have any machining experience. Maybe the videos imply that my goal is to make an instructional video, but my goal is more to make an "informational" and "entertaining" video more than a "how-to". Just a quick "here is what and how we do" if that makes sense. Engine remanufacturing is broadly based on these "assumptions" you have listed. We all know that "assumptions" can be dangerous to make! I do not know the order of operations that this engine block goes through when it is first machined at the John Deere factory, but they have to start somewhere, and the rest of these machined features are likely referenced off of that first "datum" if you will. I have researched this before with minimal luck (surprise, JD doesn't share their secrets), but from my understanding the pan rail is *typically* the first surface machined in the rough casting, along with two locating dowel holes in the pan rail (which glancing at a JD block here in the shop and a SBC block here in the shop, you see these locating holes on each end of the pan rail). These two locating dowels & the pan rail are typically used as the datums for all further machining operations in a production setting. This is why in a block like this, aligning off of the pan rails is a moderately safe assumption. The assumption is that the block was machined correctly at the factory meaning: -Planar deck surface is parallel to planar pan rail surface -Crankshaft Main Bore axis is vertically & longitudinally parallel to pan rail surface (as is the deck surface by transitivity) -Cylinder bores are perpendicular to deck surface Moving on to the assumptions regarding the machine... -It is not an assumption that the machine table is level... It IS level, and is rechecked often. This is part of maintaining equipment... there is no assumption because it is verified often. Same goes for the parallels/risers. We are not "assuming" they are planar in height... they are a precision fixture, and we can and do verify that they are correct often. Then it comes down to a judgement call. Are we confident that all features of this block were machined correctly from the factory? Are we confident that this block has never been machined by a different shop previously, or that if it has, their machines and fixtures were accurate? This is where the level comes in. Confidence in our machine and fixture tells us that when an inline block such as this is fixtured, the deck surface should be level in both directions. 90% of the time, they are! The other 10% of the time you have to use your common sense. Usually that begins with rechecking the factors in our control (is the table truly level? Did I accidentally get a speck of dirt below one corner of the block?). When those things have been verified and it is still off, you think further... (Is it possible that the block is wrong from the factory? Or is there evidence that this shop has been remanned before and maybe their equipment was out of wack?) A pre-check using a deck height gauge is a great call, but there are times when it is warranted and times where it is not. In this application, there is no reason to think there is anything out of alignment from the deck surface to the main bore axis. YES, that is an ASSUMPTION, and assumptions can get you in trouble. But from experience, this is a safe assumption to make. Further, I will add that we do have a fixture for V style blocks that uses the main bore as the datum as you pointed out The West Coast Machinist/Whiplash Engine & Machine has. Take a look at the video here: www.tiktok.com/@jamsionline/video/6879552298142551302?lang=en&is_copy_url=0&is_from_webapp=v2&sender_device=pc&sender_web_id=6817100834687600134 This fixture uses the main bore as the first datum for alignment, but again the pan rail as the second datum. It also still relies on the "assumption" that the machine table is level & the fixture is the same height on both ends. This fixture will ensure that a V style block has the deck surfaces exactly 90 degrees to each other, deck heights equal distances, decks parallel to the main axis, and bores perpendicular to the deck surface. What this fixture lacks (as I have pointed out in previous videos on my TikTok) is a reference to the cam tunnel as a datum, which would further be a more accurate/precise method of fixturing to "TRUE" the block. However, this fixture is not rated for a block as large as this John Deere. The point is, YES, we have to make assumptions in engine remanufacturing. We have to work with the material we have, and sometimes there is not enough material to truly correct each machined feature to the "truly perfect" design intent. But, we do our best. I hope that clears things up! -Nicolaus at JAMSI

Please call

Sounds good, don't let the door hit ya ;). If you understood the amount of effort it takes to do a job like this and make a video on top of it, maybe you would have some respect for it. I'm sorry that this video was too wordy for you to handle.