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Volvo diesel engine cylinders 1 through 4 on the sailboat NV show zero compression on cylinder 1 and visible head gasket failure, diagnosed by two local professional Volvo mechanics brought aboard to assist Timo.0:06 Valve clearances are checked first — intake set to 0.2 mm, exhaust to 0.4 mm — then a compression test confirms no reading on cylinder 1.1:34 Removing the cylinder head reveals a warped, corroded head surface and a burnt head gasket, with salt water intrusion causing rust on the piston face of cylinder 1.11:22 The root cause traces back to a broken water pump that caused the engine to overheat, compounded by a faulty overheating alarm that had previously been patched with epoxy.9:51 Cylinders 3 and 4 retain compression; pistons show acceptable side-play and no severe ring wear.12:02 Timo cleans the top of the cylinder block using WD-40 and a cutting blade, packing cloth into each cylinder bore to prevent debris ingestion, then hand-laps the block surface on a flat glass plate with sandpaper.14:56 The warped head is booked for machining the following Monday, with uncertainty about whether it can survive the process given an unknown prior machining history.14:36 A warped head can only be re-machined a finite number of times before it must be replaced entirely.14:51

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