Resources

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Solar Panel Series or Parallel on a 4x4?

Published 13 November 2026 · OFM4x4.co.uk Adding a second panel changes the voltage and current presented to the controller. The connectors may fit even when the electrical design does not. The quick..

12 Nov

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DC-DC Charger Sizing for a Smart-Alternator 4x4

Published 12 November 2026 · OFM4x4.co.uk A second battery is not automatically charged well by connecting it to the starting battery. Vehicle charging behaviour and cable length affect the installati..

11 Nov

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LiFePO4 Battery Charging in Freezing Conditions

Published 11 November 2026 · OFM4x4.co.uk A lithium leisure battery may still supply power when cold while charging is restricted by its battery management system. That distinction matters for winter..

10 Nov

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ProVent Catch Can Drain and Service Planning

Published 10 November 2026 · OFM4x4.co.uk A crankcase ventilation separator is a service item. If it is installed without a practical drain and filter access plan, maintenance can be missed. The quick..

09 Nov

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Headlamp Aim After a Suspension Lift or Heavy Load Change

Published 9 November 2026 · OFM4x4.co.uk Changing ride height or routinely carrying a heavy rear load can change where dipped beams point. The result affects the driver's view and other road users. Th..

08 Nov

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Reading a Roof Rack Load Limit with Accessories Fitted

Published 8 November 2026 · OFM4x4.co.uk A rack's advertised capacity is only one part of a loaded roof calculation. The vehicle roof limit, mounting kit and weight of the rack itself also count. The..

07 Nov

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Differential Breather Routing Before a Water Crossing

Published 7 November 2026 · OFM4x4.co.uk A snorkel raises the engine intake, but water can still reach other driveline components. Differential breathers deserve their own inspection before wet routes..

06 Nov

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Choosing a Winch Tree Protector for an Anchor

Published 6 November 2026 · OFM4x4.co.uk An anchor is part of the recovery system, not just a convenient place to attach a hook. The strap's purpose, rating and route around the tree all matter. The q..

05 Nov

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Portable Compressor Power Leads: Socket or Battery Clips?

Published 5 November 2026 · OFM4x4.co.uk A compressor can be correctly sized for the tyres yet unsuitable for a vehicle accessory socket. Its electrical input and connector arrangement need checking b..

04 Nov

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4x4 Wheel Nut Torque After a Wheel Change

Published 4 November 2026 · OFM4x4.co.uk A wheel can have the correct bolt pattern yet the wrong seat hardware or tightening method. This is particularly easy to miss when changing from original wheel..

03 Nov

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Understanding Tyre Load Index on a Loaded 4x4

Published 3 November 2026 · OFM4x4.co.uk An upsized tyre may look tougher while having an unsuitable marked load capacity. The sidewall code must be checked against the vehicle and the intended operat..

02 Nov

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Brake Pad and Rotor Bedding After a 4x4 Upgrade

Published 2 November 2026 · OFM4x4.co.uk New discs and pads need a controlled commissioning period after installation. A long motorway drive with little braking does not reproduce the manufacturer's b..