Volcane Periodic engine bay click

[Zippy121]

Hi all I've just done a recent engine swap on my TD Volcane, all runs very well and with no other issues than a periodic click from the engine bay when then motor is turned off.
If I leave the battery connected unused for more than a day it goes flat but if I disconnect it all is well.
Anybody had a similar problem after an engine swap?
All suggestions welcomed
Regards
David

[Ruan]

Did it have Air Con?

[Zippy121]

No, my car doesn't, the replacement engine did but I used my original loom, alternator and brackets/pulleys and sensors etc