Some additional info.
When I fitted the cam sprocket with new bolt, the cam sprocket cover( where others have the vacuum pump) could not be tightened to seat the cover properly. What I observed was that the bolt centre hole should accept the protrusion on the sprocket cover(inside) about 5-6 mm. But the new bolt centre is not large enough so I had to cut the protrusion of sprocket cover by similar amount to complete the job. If you keep on tightening the bolts, the cover will crack and the cover is about 100GBP new. Could not trace a used part on e of bay.
