Teardown and Documentation: The Boring Work That Saves the Build

Teardown is the least glamorous phase of a restoration and the one that decides whether it finishes. Nobody posts photographs of labelled bags. There is no satisfaction in a spreadsheet. The work produces no visible progress — the car gets worse-looking every day you work on it, and at the end you have a shell and a room full of boxes.

And yet the difference between a project that reaches the road and one that occupies a storage unit for a decade is almost always what happened in these few weeks. Not skill, not budget, not the quality of the parts. Documentation.

The reason is simple and it catches everyone. A restoration takes years. You will not remember how that bracket was oriented, which of four similar bolts came from which hole, how the wiring was routed behind the dash, or which way round the shims went. You are confident you will. You will not. And the information only exists while the car is still assembled.

This guide covers how to take a vehicle apart so it can be put back together: what to photograph, how to handle fasteners, what to write down, what order to work in, and the mistakes that cost the most later.

The Mindset

You are not dismantling a car. You are capturing information while destroying the only copy of it.

Every assembly on the vehicle is a piece of documentation. The way a bracket sits, the orientation of a clip, the routing of a hose, the position of a shim, the factory paint mark on a fastener — all of it is information that exists in exactly one place, and that place is about to be disassembled.

Once you adopt that frame, the right behaviour becomes obvious. You photograph before you touch. You bag by location. You write down what you find. It feels slow. It is the fastest thing you will do in the entire project.

Photography

The single highest-return activity in teardown, and storage costs nothing.

Take far more than feels reasonable

Before touching any assembly, photograph it from multiple angles. Then photograph the fasteners in place. Then photograph it again partway apart. Then photograph what is underneath.

The specific things people wish they had photographed:

• Wire routing and clip locations. Not just where a harness goes, but which clip held it, in which hole, and in what order the branches split off.
• Hose and line routing, including every bracket and every path behind or around something else.
• Bracket orientation. Many brackets fit two ways and only one is correct.
• Shims, spacers and washers — where they were, how many, and in what order they stacked.
• Fastener types and lengths in position, because a bolt that is a quarter inch too long in a blind hole will bottom out and crack a casting.
• Factory markings — inspection marks, paint daubs, crayon marks, chalk, stencils and date stampings. These matter enormously for a correct restoration and they are destroyed by media blasting.
• Panel gaps and alignment before disassembly, so you have a reference for what the car looked like when its structure was still holding itself together.
• Overspray and undercoating patterns, if originality matters, because the factory applied them in a specific way.
• Interior trim layers and the order they came apart in.
• The dash from behind, extensively, before anything is unplugged.

Make the photographs findable

Thousands of images in one folder is the same as no images. Create a folder per assembly as you go — front suspension, left door, dash, trunk — and move the day's photographs into it before you stop working. It takes two minutes and it is the difference between a reference library and a pile.

Put something in the frame for scale and identification when it is not obvious: a ruler, a piece of paper with the assembly name written on it, or your hand.

Video is underrated

For anything with a sequence or a routing — a wiring loom, a window mechanism, a convertible top frame, a linkage — a slow video narrating what you are doing as you do it captures more than any number of stills. Thirty seconds of "this goes under here, behind that, and clips into the third hole" will save you an hour two years later.

Fasteners

Bag and tag by assembly, not by size

This is the rule that matters most and the one most commonly got wrong.

Sorting fasteners by thread size feels organised. It is the opposite of useful, because it destroys the only information you actually need, which is where each fastener belongs. A box of correctly sorted quarter-inch bolts tells you nothing about which of them came out of the door hinge.

Instead: every fastener from one assembly goes into one labelled bag. "Left front door — hinges" with a note on which hole each came from if they differ. Write on the bag with a permanent marker, not on a tag that falls off.

Zip-top bags in a labelled box per area work perfectly well. Small parts organisers with lids work too. What does not work is a bucket.

Note what is special

Not all fasteners are reusable or interchangeable.

• Torque-to-yield bolts stretch permanently when tightened and are single-use. Head bolts, many main and rod bolts, some suspension and driveline fasteners. Reusing them risks a failure.
• Fasteners with thread-locking compound applied from the factory need the compound reapplied.
• Fasteners with specific finishes matter for a correct restoration — black oxide, phosphate, cadmium, zinc, bare. Note the finish before anything is blasted, because afterwards you will not know.
• Studs versus bolts in the same hole on different production dates.
• Captive nuts and weld nuts that need chasing with a tap before reassembly.
• Different lengths in the same assembly, which is extremely common and extremely easy to get wrong.

Decide early whether you are reusing them

For a driver-quality build, a complete new fastener kit for the whole car is often the cheapest and fastest path, and it removes a large category of problems.

For a correct restoration, the original fasteners with their correct finishes are part of the specification, which means cleaning and replating individually — a slow, real cost that belongs in the budget.

Decide now, because it determines whether you are preserving fasteners carefully or simply noting what size to buy.

The Build Log

A written record. Paper notebook, spreadsheet, or a document on your phone — the medium matters far less than the habit.

What to record

Part numbers, both what came off and what you ordered as a replacement, with supplier.

Torque values, looked up and written down as you encounter each fastener, so you are not researching the same specification three times.

Clearances and measurements — anything you measure, record. Ring gaps, bearing clearances, endfloat, panel gaps, ride height, pinion angle, driveshaft length.

Decisions and the reasoning. This is the most valuable category and the one people skip. "Chose the larger radiator because of the engine change" is a sentence that will stop you undoing your own thinking in eighteen months.

Problems found and how they were resolved. A cracked casting, a stripped thread, a panel that needed reworking. These recur, and you will want to know what you did.

Suppliers, with what was good and what was not. Reproduction part quality varies enormously and your own experience is the most reliable guide you will have.

Where things are stored. On a long project this becomes genuinely important. "Trim — shelf 3, trunk parts — blue tote" prevents the hour-long hunt that kills a Saturday.

What is still outstanding per phase, so you can resume without re-deriving the plan.

Why it matters more than it sounds

Most projects stall. Not from failure — from a house move, a job change, a new child, an injury, or simply a winter where nothing happened. The stall is normal. What determines whether the project survives it is whether you can pick it up and know where you were.

Without a log, resuming means re-learning the car, re-measuring things you already measured, re-researching decisions you already made, and discovering that you cannot remember what is in the boxes. That is the point at which projects quietly become permanent storage.

Sequence

Document the whole car before removing anything

A full photographic survey, inside and out, underneath, engine bay, trunk, and the interior intact. Panel gaps, stance, ride height measurements at each corner. This is your reference for what the car was.

Then work outside in, and top down

Trim and brightwork first, carefully, because this is where the irreplaceable parts are. Badges, mouldings, lenses, bezels, handles, mirrors, glass. Label and wrap each piece individually — brightwork scratches if it touches other brightwork.

Then interior: seats, carpet, underlay, trim panels, headliner, dash. Photograph behind the dash extensively before unplugging anything.

Then glass, with the seals noted and the correct removal method researched first — bonded glass and gasket-set glass come out completely differently, and breaking a piece of date-coded glass is expensive and sometimes unreplaceable.

Then mechanicals: engine, transmission, driveline, fuel, brake, suspension and steering.

Then wiring, as complete looms where possible, photographed and labelled at every connector.

Then the shell.

Set panel gaps before you take the panels off

Counterintuitive but important. With the doors, hood and trunk hung on the car as it sits, measure and record every gap. On many cars, hanging the panels in bare metal later and discovering they will not align tells you the structure has moved — and your original measurements are the only evidence of what "right" was.

Some restorers go further and tack-weld temporary braces across door openings before removing doors and before any structural metal work, specifically to hold the shell in shape. On a car with significant rust in the rockers or floor, this is not optional — the structure that was holding the openings square is about to be cut out.

Blasting and Bare Metal

Do not blast everything at once

Bare steel begins to flash-rust within hours in humid conditions, and faster if there is any residual moisture or blasting media left in a seam.

Blast only what you can prime the same day. Work in batches tied to the phase you are actually building. A fully stripped shell left in a damp shop over a season will develop a layer of surface rust that has to be removed again — and the second removal takes metal with it.

Match the media to the material

Aggressive media at high pressure on thin sheet metal will stretch and warp the panel permanently, and the distortion is not recoverable by sanding. Sheet steel needs softer media and lower pressure than a frame or a bracket.

Chemical stripping and dipping remove everything, including coatings inside seams, which is thorough and is also the risk — a dipped shell must be neutralised completely and coated immediately or it will corrode faster than before, from inside the seams where you cannot reach.

Capture what blasting destroys

Factory inspection marks, paint daubs, stencils, date stampings and assembly markings are all information, and they are gone the moment the media hits them. For a correct restoration these matter. Photograph every one before stripping, with a note of exactly where it was.

Prime immediately

Epoxy primer on clean, bright, degreased metal, inside and out wherever you can reach. This is the corrosion barrier for the entire project and everything else goes on top of it.

Storage

The project will be apart for a long time. Where the parts live determines what condition they are in when you need them.

Bare metal and machined surfaces need protection — oil, wax, or a corrosion-inhibiting coating, and dry storage. A machined surface left bare in a damp garage will pit.

Rubber and plastic degrade with light, heat and ozone. Store out of sunlight, cool.

Brightwork individually wrapped so pieces never touch each other.

Upholstery and fabric dry, sealed against rodents, and off the floor.

Large panels stored vertically in a rack rather than stacked flat, because stacked panels get dented by whatever ends up on top and bowed by their own weight.

Fasteners and small parts in sealed labelled containers, with the labels on the outside where they are readable without opening anything.

Everything off the concrete floor, because concrete wicks moisture.

And keep an inventory of what is where. On a multi-year project with several hundred labelled containers, the inventory is what makes the labels useful.

The Mistakes That Cost the Most

Not photographing enough. Universal, and the cost is paid repeatedly over years. There is no such thing as too many photographs.

Sorting fasteners by size. Destroys the location information, which is the only information that matters.

Blasting the whole shell with nowhere to put it and no time to prime it. Creates work.

Cutting structural metal without bracing the openings first. Lets the shell relax out of square, and getting it back is a much bigger job than preventing it.

Throwing away the old part before the new one is confirmed to fit. Reproduction parts are frequently wrong, sometimes very wrong, and the original is the only pattern you have. Keep everything until the replacement is physically fitted and correct.

Mixing left and right. Many parts are handed and look identical. Mark them as they come off.

Removing glass without researching the method. Broken date-coded glass on an older car can be months of searching.

Leaving several assemblies half apart. Parts migrate, get damaged, and get lost. Finish disassembling and cataloguing one area before opening the next.

Trusting memory. The single consistent thread in all of the above. Every restorer who has lost a weekend to a bracket they could not orient says the same thing afterwards, and they all say it about something they were certain they would remember.

Labelling Systems That Actually Work

The method matters less than the consistency, but some approaches hold up over years and others collapse within months.

Write on the bag, not on a tag. Tags fall off, strings break, and a detached tag is worse than no tag because it is now misinformation sitting next to the wrong parts. A permanent marker directly on a zip-top bag survives being moved a dozen times.

Use a location code, not a description. "LF-DOOR-HINGE-UPPER" beats "door bolts" because it is unambiguous two years later and because it sorts. A simple convention — left front, right rear, and an assembly name — covers almost everything on a car.

Photograph the label with the parts in frame. Then the photograph library and the physical boxes cross-reference each other, and if a label is ever damaged you can reconstruct it.

Double-bag anything oily. Marker on a greasy bag disappears, and a leaking bag contaminates everything near it.

Put large parts in a rack with a written inventory, because you cannot label a fender usefully and you will not remember which of four similar brackets came from where.

Keep a master index. A single sheet, or a spreadsheet, listing every container and what area it holds. On a project with two hundred bags across eight boxes and three shelves, the index is what makes the labelling worth anything. Without it you are opening boxes to find things, which is the problem labelling was supposed to solve.

Avoid clever systems you will not maintain. Colour coding, numbered schemes that require a lookup table, and anything needing software you will stop using. The system that works is the one you will still be following in month thirty when you are tired and it is cold in the garage.

Preparing for the Gap

Almost every long project pauses. Planning for the pause rather than being surprised by it is what keeps the car from becoming permanent storage.

Leave it in a stable state. The best place to stop is with the shell sealed and primed, because primed metal waits for years without deteriorating. The worst is with bare blasted metal exposed, several assemblies half apart, and parts loose on the floor.

Write a resume note before you stop — not a general log entry, but a specific note to your future self: what you were in the middle of, what the next three tasks are, what is on order, what you were unsure about, and anything you had worked out but not yet acted on. One page. It is the single most useful document in the project when you come back.

Protect everything properly rather than intending to come back next weekend. Cover the shell to keep dust off but not so tightly that it traps moisture. Oil bare machined surfaces. Get parts off the concrete.

Keep the inventory accessible, ideally a copy outside the garage, so you can order parts and plan without having to go and look.

Take a final set of photographs of the current state, including the open assemblies, so you can see where you were without disturbing anything.

The projects that come back after two years are not the ones with the most committed owners. They are the ones where somebody spent an hour closing it down properly instead of walking away mid-task — because the cost of restarting is almost entirely the cost of rebuilding the lost context, and that hour is what preserves it.

Why This Is the Best Investment in the Project

Teardown documentation costs you a few extra hours per assembly and some bags and a notebook. What it buys is that the reassembly phase — which is the fun part, the part where the car comes back — proceeds without stopping every twenty minutes to work out what goes where.

It also buys the ability to hand the project to somebody else. If you run out of time, or need a shop to finish a phase, or eventually sell it on, a documented project with labelled parts and a build log is worth dramatically more than the same pile of components with no information attached. Buyers pay for the absence of unknowns, and that is exactly what the documentation is.

Mostly, though, it buys the project's survival through the stall. Every long restoration has at least one. The ones that come back are the ones where somebody wrote it down.