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At THAT many miles I do not suggest cutting corners on the process of servicing the timing belt. If you skip the process of releasing the camshaft cogs then you cannot properly retime the cams to crankshaft because of the now stretched timing chain. At 240,000 miles I'd be servicing the timing chain as well, but that's not easy to do.

Well, one does if they intend on doing the job *by the book*. There's nothing wrong in doing the job in this manner IF the engine is not a high mileage unit. The timing chain does stretch, when it does that throws off the cam timing making it late. If one does not release the cam sprockets to *reset* them to the *new* position when rotating the crank for #1 top center & locking them down you will end up with the same late cam timing you started with.