Citroën Méhari Restoration: The Complete Technical Guide for Serious Enthusiasts

The Citroën Méhari is one of the most distinctive vehicles ever to roll out of a French factory. Produced from 1968 to 1987, with over 144,000 units built, this lightweight open-top utility car carved its own niche between the 2CV and a proper off-roader. Its ABS thermoplastic body panels, 2CV-derived mechanicals, and radical minimalist design make it both a joy to own and a genuinely challenging vehicle to restore correctly. A Méhari restoration is not like restoring a steel-bodied car. The rules are different, the materials behave differently, and the mistakes are different too. This guide covers everything you need to approach a Citroën Méhari restoration with precision and confidence.

Understanding the Méhari Before You Start: Key Technical Specifications

Before touching a single bolt, you need to understand what the Méhari actually is. Ignorance here leads to expensive errors that are difficult to reverse.

Chassis and Platform

The Méhari rides on a modified 2CV platform — specifically, a flat steel platform chassis that was also shared with the Dyane. This chassis is fully separable from the body, which is a major advantage during restoration. The floor pan consists of pressed steel sections bolted together, not welded as a monocoque. Corrosion typically attacks the longitudinal rails, the outriggers supporting the body mounting points, and the areas around the suspension turrets. Always inspect the chassis with the body removed if possible.

ABS Body Panels: What They Are and Why It Matters

The Méhari’s body panels are made from ABS (Acrylonitrile Butadiene Styrene), a thermoplastic that was revolutionary for the automotive industry in 1968. These panels do not rust. However, they are vulnerable to UV degradation, which causes chalking, brittleness, and cracking over decades. They can also deform under prolonged heat, crack under impact, and become extremely brittle when old and untreated. The original colour was moulded into the material — there is no paint on an original Méhari body.

Engine and Drivetrain

All Méharis use air-cooled flat-twin engines derived from the 2CV. Production ran through three main specifications:

• 435cc (1968–1970): 18 bhp, single carburettor, found only on early models
• 602cc (1970–1979): 28 bhp, the workhorse of the range
• 602cc updated (1979–1987): Improved carburation, slightly better emissions compliance

The gearbox is a 4-speed unit with a centrifugal clutch system — the same semi-automatic setup available on the 2CV Ami. Cooling comes purely from airflow directed by a fan and ducting around the cylinder barrels and heads.

Assessing a Méhari Before Restoration: What to Look For

A proper assessment saves you from buying a money pit or, worse, missing structural damage that compromises safety.

Chassis Inspection Points

Lift the vehicle and inspect all four corners of the platform. Pay particular attention to:

• Outriggers (the horizontal arms that support body mounts) — these corrode from the inside
• Front crossmember and radiator panel area
• Floor sections under the seats where water pools
• The transmission tunnel region on later models

Use a screwdriver to probe suspect areas. Pinhole rust in outriggers is not necessarily fatal if caught early, but severe section loss requires panel fabrication or specialist replacement sections.

ABS Panel Condition Grading

Grade your panels honestly before purchasing or starting work:

• Grade A: Minimal chalking, no cracking, flexible — restoration possible with surface treatment
• Grade B: Significant chalking, hairline cracks, some brittleness — requires careful chemical treatment and possible reinforcement
• Grade C: Deep cracks, section loss, extreme brittleness — replacement panels required

Grade C panels are not always a disaster. New reproduction ABS panels are available and maintain the correct profile and mounting geometry.

Mechanical Assessment

Check compression on both cylinders — should be 120–130 psi with no more than 10 psi difference between the two. Listen for tappet noise (adjustable, but often neglected), check for oil leaks at the pushrod tubes (a chronic Méhari/2CV issue due to ageing rubber seals), and test the centrifugal clutch engagement smoothness. Gearboxes are generally robust but check for jumping out of third gear, which is a known weakness in high-mileage units.

Méhari Restoration: The Chassis and Metalwork Phase

With the body removed, the chassis becomes your priority. Do not skip this phase to save time — corroded outriggers are a structural and safety issue on a vehicle with no crumple zones or reinforcement structure beyond the platform itself.

Stripping and Treating the Platform

Remove all rubber seals, wiring looms, and mechanical components before any chemical treatment. Strip the platform to bare metal using either media blasting or chemical rust remover — both work, but media blasting is faster and more thorough. Treat all bare metal with a zinc phosphate primer within 24 hours of stripping to prevent flash rust. For areas with light surface rust, a rust converter (phosphoric acid-based) will neutralise and prime simultaneously.

Fabricating or Replacing Outriggers

Outrigger sections are available as reproduction parts. If only one end is corroded, cut the affected section cleanly with an angle grinder and weld in a new section using 1.5mm mild steel. All welds should be fully seam-welded, not plug-welded, on structural sections. After welding, treat the interior of box sections with a wax injection product (Dinitrol 3125 or equivalent) to prevent recurrence.

Final Chassis Finish

The original chassis was finished in black. Use a two-component epoxy primer followed by a chassis paint or underbody wax product. Avoid rubberised underseal on the upper faces of the platform where body panels mount — it prevents water egress and traps moisture. Apply it only to the underside.

Working with ABS Body Panels: Restoration and Replacement

This is where Méhari restoration diverges most sharply from conventional vehicle restoration. ABS panels require a completely different skill set and product range.

Cleaning and Surface Preparation

Begin with a thorough degreasing using isopropyl alcohol — never use petroleum-based solvents on ABS as they cause crazing and surface attack. After degreasing, machine polish the panel with a medium-cut compound to remove the oxidised surface layer (the chalked, powdery finish). This reveals the original colour beneath. Do not use aggressive cutting compounds; a 3M Finesse-It type product works well. After polishing, apply a UV-stabilised ABS conditioner to restore flexibility.

Repairing Cracks in ABS Panels

Small hairline cracks can be repaired. The method:

1. Stop-drill the ends of each crack with a 3mm bit to prevent propagation
2. V-groove the crack face with a rotary tool to a depth of 2mm
3. Bond with ABS-compatible plastic welder (hot air plastic welding is preferable to chemical bonding for structural repairs)
4. Reinforce the reverse side with a backing strip of ABS sheet, solvent-bonded with MEK (methyl ethyl ketone) or dedicated ABS cement
5. Finish the surface with flexible body filler if cosmetic finish is required

Sourcing Reproduction Panels

Where panels are beyond repair, reproduction ABS panels are manufactured to the original Citroën specifications. These are available in the original colours and mount using the original fixings. Always check panel fitment dry before final installation — even reproduction panels can require minor adjustment at mounting tabs.

Restore your Méhari with the right products and expertise. Art de la Rénovation supplies specialist materials for ABS panel restoration, chassis treatment, and Méhari-specific restoration products.

Explore the Méhari restoration range →

Mechanical Restoration: Engine, Suspension, and Brakes

Engine Rebuild Essentials

A full engine rebuild on the 602cc flat-twin is a straightforward job for anyone familiar with air-cooled mechanics, but tolerances matter. Key specifications:

• Piston-to-bore clearance: 0.04–0.07mm
• Valve clearance (cold): Inlet 0.15mm, Exhaust 0.20mm
• Pushrod tube seals: Always replace — these are the most common source of oil leaks
• Head torque: 25 Nm, in sequence, cold
• Ignition timing: 5° BTDC at idle, 28° total advance

Carburettor: the Solex 26 or 28 is standard depending on year. Rebuild kits are still available. Pay attention to the needle valve seat — worn seats cause flooding and fuel smell, a fire risk in an open vehicle.

Suspension Overhaul

The Méhari uses the 2CV’s interconnected inertia-based suspension with coil springs and friction dampers front and rear. Replace the leading arm bushes (they wear oval and cause vague handling), the anti-roll bar links, and inspect the spring pots for corrosion. The friction dampers — while unusual — are rebuildable. Replacement with hydraulic units is possible but changes the ride character significantly.

Braking System

All Méharis use drum brakes on all four wheels. The master cylinder is a single-circuit unit on early cars — a significant safety concern. Check whether a previous owner has upgraded to a dual-circuit system. If not, consider this as part of your restoration. Rebuild the wheel cylinders with new seals, replace all rubber hoses regardless of appearance (rubber hardens internally and causes partial blockage), and skim the drums if they show scoring over 0.3mm depth.

Common Mistakes in Méhari Restoration

Painting the ABS Panels

This is the single most common and damaging mistake. Standard automotive paints do not bond reliably to ABS without extensive surface preparation, and even then, thermal cycling causes delamination within a few seasons. If colour restoration is needed, the correct approach is to polish back to the original pigmented surface and treat with UV stabilisers, or — in severe cases — source correctly coloured reproduction panels. If painting is absolutely necessary, use only flexible plastic primer and plastic-compatible topcoat systems, and understand this is a compromise, not a solution.

Neglecting the Chassis While Focusing on the Body

The Méhari’s ABS body is visually striking, making it the focus of attention. But a beautifully restored body on a corroded chassis is both dangerous and a waste of investment. Always complete chassis restoration before refitting the body.

Using Incorrect Sealants and Adhesives

Silicone sealants attack ABS over time. Petroleum-based products cause surface crazing. Use only ABS-compatible products throughout. This applies to cleaning agents as much as adhesives.

Ignoring Electrical Wiring

Original Méhari wiring is now 40–55 years old. Insulation becomes brittle and cracks, particularly in areas exposed to heat near the engine. A wiring fire in an open vehicle with a thermoplastic body is a very serious event. Complete rewiring with correct-gauge cable and period-correct connectors is not optional on a high-mileage example.

Parts Sourcing and Availability

Mechanical Parts

Méhari mechanical parts are largely shared with the 2CV, Dyane, and Ami. This means the supply of engine components, gearbox parts, suspension components, and brake hardware is excellent. 2CV specialist suppliers across Europe stock most items as new or quality reproduction parts. Parts unique to the Méhari — such as specific body mounting hardware and certain wiring loom sections — require specialist sourcing.

ABS Body Panels and Restoration Products

Reproduction body panels are manufactured by specialist companies and are dimensionally accurate. Quality varies between suppliers — always verify that panels are moulded in ABS and not GRP (fibreglass), which behaves differently and requires a completely different finishing approach.

Specialist ABS restoration products — UV stabilisers, compatible adhesives, plastic polishes, and conditioners — are essential for a correct restoration and are stocked by dedicated Méhari restoration suppliers.

Conclusion: Approaching a Méhari Restoration the Right Way

A Citroën Méhari restoration rewards methodical, informed work. The combination of a steel platform chassis and ABS thermoplastic bodywork means you are effectively working with two completely different material systems simultaneously, each requiring its own products, techniques, and attention to detail. Get the chassis solid and correctly treated. Understand ABS before you touch the panels. Rebuild the mechanicals to specification. Avoid the shortcuts — particularly the temptation to paint the body or skip chassis treatment in favour of a quick cosmetic result.

Done correctly, a restored Méhari is a genuinely usable, characterful vehicle that will last another fifty years. Done incorrectly, it is an expensive and fragile imitation of one.

Ready to start your Méhari restoration?

Art de la Rénovation provides specialist products selected