Hi all I have a escort van 2000 in year 1.8 endura diesal nonturbo which on cold start makes a noisefrom camshaft area sounds sort of like lack of oil . But had fresh oil change and new filter to see if that could have been problem. After about 5 minutes of running the noise goes and will not re appear all day long but again first thing in morning will be back . Would be gratefull for any help