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Volvo from Heck noted you can do the leak test with the head off on a stand if you're concerned about interference. Even with the head on, if the timing belt is off just set the crank pulley say at about 15 deg on the timing cover marking and you can safely turn the cam all you want.
As much as the B200 is listed as one of the few interference red blocks, my guess is that the B200FT variant may actually not be interference, or if it is then barely so. The compression ratio for the B200FT/GT is listed as 8:5:1, similar to the very non-interference B230FT which is 8.7:1 and the B230F at 9.8:1. Only the B200F/E/G variants are listed as high compression 10:1, so if anything is interference then it's those variants (same as the 16-valve B234F at 10:1, which is definitely an interference engine as many know all too well).
Volvo valves are known to be sturdy. If you're manually turning the crank with the plugs out then I quite imagine if a piston hits a valve you will know to stop long before doing any kind of damage.
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now
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