XK & F-Type: reluctant hydraulic latches
Don't force the latchHow it shows up
The roof glides through its whole cycle, then stalls a hand-span from the windscreen, or the latch motor whirs without ever pulling the header rail down and locked. Some days it works; warm days, often not. You may also notice the roof getting slower to release at the start of a cycle. The latch rams are losing hydraulic pressure through ageing seals, and they fail gradually, then suddenly.
Why it gets misread
The tempting move — pressing the roof down by hand while the latch fights — bends components built to fine tolerances and can leave you with a roof that's neither open nor closed. Workshops that rarely meet these systems quote a new pump, or a complete latch assembly on back-order, when the cylinders themselves are usually rebuildable. The fault is hydraulic; the bill doesn't need to be aristocratic.
How we repair it
We pressure-test the latch circuit to confirm where it's bleeding down, then rebuild the cylinders with new seals where the hardware allows — pressure-tested before refitting — rather than defaulting to dealer-only assemblies. Latch alignment is checked so the rail lands square, the system is flushed and bled, and the roof is cycled and locked repeatedly before you collect the car.