Brother it feels very sad that your woo engine cam shaft broken again.
to me main possible cause could be uneven load inside engine .
engine head may be not properly tightened in sequence.
Had you work done last time on piston rings n valves also ?
any machining work done on head or not ?
the replacement cam was kabli or geniune one ?
your heat guage might not responded to actual engine temp.
anyhow be patient with your situation n Allah apni Hifazat mein aap ko salamat rakhey . AAMEEN
YOUR WELLWISHER
POSTI