WhisperingAl

Thanks for the reply. 
the mechanic I am using has been excellent over the years with other cars and he has taken the covers off and checked again and says it is ok. 
I will ask him again. 
The cam adjuster is on a spring. I am wondering if you need to turn the adjuster and then put the chain on. 
There are many posts all over the internet with the same problem but I cannot find one with a fix.