Built around the value-cliff angle: a worn DMF often gives months of warning (rattle at idle, knock on engine shutoff, judder pulling away from cold) before total failure, but the repair, £350–£900 for a clutch alone, £700–£1,500 for clutch + DMF on a typical diesel, up to £2,800 on premium German marques,  frequently exceeds 50%+ of an older car's value. Includes a dedicated "value-cliff" section with percentage-of-value guidance, a repair-cost comparison table, a simple self-diagnostic tip (does the noise quieten with the clutch pedal pressed down?), confirms no MOT or service history is needed to sell, and closes with STC's sell proposition (free collection, V5C only, no haggling) plus a four-item FAQ block for schema markup.

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Leads with a self-check diagnostic for owners who suspect but haven't confirmed a blown head gasket: persistent white exhaust smoke, mayonnaise-like residue under the oil cap or on the dipstick, unexplained coolant loss, and overheating or rough running. Gives realistic UK repair costs from £500–£900 on small/mid cars up to £3,000+ on premium or turbocharged engines, rising further if overheating has warped the cylinder head or caused wider engine damage. Includes a cost comparison table, a brief honest note on sealant additives as a short-term-only fix, confirms no MOT or service history is needed to sell, and closes with STC's sell proposition (free collection, V5C only, no haggling) plus a four-item FAQ block for schema markup.

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Covers wet belt failure in Ford EcoBoost and Peugeot/Citroën/Vauxhall PureTech engines - what it is, why it fails, warning signs (low oil pressure light, ticking at idle, rubber grit in the oil filter), and realistic UK repair costs from £580 for a proactive belt-only job up to £3,000–£6,000+ for a full engine rebuild after failure. Includes a repair-cost comparison table, notes the Stellantis compensation scheme for affected PureTech owners, explains that no MOT or service history is needed to sell, and closes with STC's sell proposition (free collection of non-runners, V5C only, no haggling) plus a four-item FAQ block for schema markup.

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Selling a non-runner car in the UK doesn’t mean settling for scrap value. From engine and gearbox failures to electrical faults and MOT failures, many non-runners still hold strong value. This guide explains the different types of non-runner cars, which fetch the best prices, and why selling to a trusted buyer like Sell The Car offers a faster, hassle-free alternative with guaranteed quotes and free collection.

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