Camshaft sproket and camshaft worm gear nuts

I can't take off the camshaft sproket nut and the camshaft worm gear nut (left threaded) I've tried everything, but I've fallen in desperation after so many tries.
Any advices about this ones?

I've already prepared a cutaway timing side cover for this stuff (as Mick Hemmings DVD shows).
I've used heat, penetranting oil, strength (well, as much as I can) but nothing seems to work.

Thanks for you help!

Electric/air impact hammer?

sparkplug said:

I've used heat, penetranting oil, strength (well, as much as I can) but nothing seems to work.

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Other members have also said previously that they'd had some difficulty removing the pump worm gear nut, so you just have to keep trying!



As BrianK said, a power tool like an air impact wrench seems to work best.

I had the same problem, with the engine in the frame. I removed the exhaust header which gave a more in line leverage. Then with a ring spanner and extension and steady force which looked like it might break something ( the spanner and extension bending considerably) it suddenly cracked Thought i'd broken something but turned out the nut cracked loose. :lol:

Apply heat with a "blowlamp".