LPG conversion: what to check before converting your car

What an LPG conversion changes

An LPG conversion adds fuel storage, delivery and control equipment while retaining your car’s petrol system. LPG (propane-butane) is widely used as a car fuel in Georgia. The conversion includes a tank, fuel lines, filling connection and equipment that supplies gas to the engine. You are changing how the engine receives fuel, not replacing the engine itself. Ask the installer to explain how the proposed system starts, switches fuels and behaves when the gas supply runs low.

Modern sequential LPG systems inject gas near each intake port and are tuned to the engine. A control unit coordinates gas delivery with engine operation, while a reducer prepares the gas for delivery at the required pressure. Correct installation and calibration matter because the engine needs an appropriate fuel mixture across different driving conditions. A system that seems smooth while parked still needs checking under load, rather than being judged only by how it idles outside the workshop.

Which engines suit LPG and when to consider it

Engine suitability depends on the exact engine and its condition, not simply the car’s make or age. Direct-injection petrol engines need special LPG systems. Give the installer your engine code and any available service records before accepting a proposal. Some engines need particular attention to valve and valve-seat compatibility, and some installations continue using petrol during gas operation. Ask whether the proposed equipment supports your exact engine and what ongoing checks the installer recommends for it.

A conversion is an optional change, not a repair required by a particular warning light. You might consider it if you expect to keep driving a petrol car and want to assess a different fuel option. However, rough running, misfires, difficult starting or an engine warning light are reasons to diagnose the existing car first. For an imported used car in Georgia, an uncertain maintenance history makes that baseline inspection especially useful. Postponing conversion is different from postponing an existing engine fault.

• Confirm the engine code and whether it uses port or direct injection.
• Describe any rough running, warning lights or starting problems.
• Ask about valve compatibility and any additional maintenance.
• Check whether petrol is also consumed during LPG operation.
• Request an explanation of suitability for your exact engine.

Where the tank goes and how it affects your car

The LPG tank usually occupies the spare-wheel well or part of the luggage compartment, depending on the car and proposed installation. A tank in the spare-wheel well changes where you carry a spare, while a cylindrical tank can reduce usable boot space. Ask to see the intended position before agreeing to the work. Consider your normal luggage, family use and access to underfloor storage, rather than choosing a layout only from a photograph of another vehicle.

Tank placement also needs to work with secure mounting, access to fittings and protected routing of fuel lines. Ask the installer to show where the filling connection will sit and how the installation avoids vulnerable areas. If you regularly use mountain roads or carry a loaded boot, explain that use during the assessment. Do not assume the tank’s stated capacity equals the amount you can fill; ask the installer to explain the tank’s filling controls and normal use.

How a shop carries out the conversion

A shop carries out an LPG conversion by assessing the car, installing compatible equipment, checking for leaks and calibrating fuel delivery. Plan for a visit of roughly 1–3 days, with the actual handover time confirmed after assessment. Existing faults, equipment availability or additional diagnostic work can change the schedule. You should know what the proposed job includes before installation begins, including the tank layout, the equipment being fitted and how any unexpected work will be approved.

The final checks should cover both petrol and gas operation, not just whether the engine starts after installation. Tell the shop how you normally drive, including stop-start Tbilisi traffic and journeys involving sustained climbs. These conditions help frame questions about the calibration and road test. Before collecting the car, ask the installer to demonstrate the fuel selector, explain its indicators and describe what you should do if the system gives a warning or switches back to petrol.

• Inspect the engine’s condition, identify the engine and resolve relevant existing faults.
• Agree on compatible equipment, tank position, filling point and the scope of work.
• Install the tank, protected fuel lines, gas delivery equipment and controls.
• Check connections for leaks and inspect the completed installation.
• Calibrate the system, test petrol and LPG operation and assess driving behaviour.
• Explain operation, maintenance, documentation and any recommended follow-up checks.

What affects the cost and what to ask the shop

The cost depends on engine compatibility, the equipment selected, tank layout and the work needed for a sound installation. A direct-injection application may involve different equipment and calibration from a port-injection engine. Existing ignition, cooling or engine-management faults can add separate repair work. Ask for an itemised proposal that distinguishes the conversion from repairs needed beforehand. Without that separation, it is harder to compare quotations or understand why one proposed installation differs from another.

Ask before booking what is included in assessment, fitting, calibration, testing and handover, and whether follow-up checks are included. After installation, ask for the equipment details, maintenance guidance and a record of the work performed. On Junto, shops can send suggested work for your approval by SMS link, showing each line and its price before work starts. That gives you a practical way to review extra work rather than treating an initial estimate as approval for every later repair.

Which paperwork and safety checks to confirm

You should check current certification, registration and inspection rules before authorising a conversion. Gas equipment must be installed by a qualified installer, and the rules on certification and inspection should be checked with the relevant authority. Ask which documents you will receive and verify what applies to your car with the authority responsible, including any implications for periodic technical inspection in Georgia. Do not treat another owner’s experience or an older online post as confirmation of the current process.

After the work, unresolved gas odours, rough running or repeated switching problems call for prompt assessment, not repeated attempts to adjust the system yourself. If you suspect a gas leak, stop using the car, avoid ignition sources and seek professional assistance. Continuing to drive with a fuelling fault can worsen running problems and may damage engine or exhaust components. Arrange the installer’s recommended checks and ask the shop for maintenance guidance rather than applying a generic interval found online.

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