X-Flow tappets really tight - are they meant to be?

[Namtip]

I wanted to adjust my X-Flow's tappets, so off came the rocker cover, out came the 7/16" ring spanner and feeler gauges.  However I cannot budge the tappet screws with the spanner.  They are stuck fast.  I even tried tapping the spanner with a hammer (lightly) - but nothing.

Should I be using a longer spanner for more torque (mines only 6" or so), or is there something I'm missing?

Thanks in advance.

[philwaters]

It's been a while, but I always remember them being really tight and hard to move. If memory serves, they only rely on friction, no locking nut. A long bar with gradual pressure is better than tapping with a hammer which is more likely to bend the spanner. Can you get a socket and use a large wrench with a set-down adaptor as required?

[SM25T]

From my Mark 2 Cortina crossflow days .... they are self locking bolts, so very tight. Use a ratchet handle and socket ... or get a longer ring spanner .... 6" long doesn't sound very big at all when it comes to leverage.

[Jim 123]

Are you certain that the valves are fully shut on the valves that you are trying to loosen?  Sorry if I'm stating the obvious.