Hi all,
Thanks for your thoughts and input, looks like I am just being paranoid which is good I guess. I now really need to test it on a hot day in traffic that is the real test I guess. On the straight curved blade issue, the ebay fan had more blades and was curved the Davies Craig has less and they are straight. Don't really know what it all means but the Davies Craig fan certainly moves significantly more air than the ebay one (funny about that) and even dims the headlights and dash lights when turned on. Hmm may need a new alternator bugger. It will have to be a shinny chrome one more under bonnet bling
.
Cheers Andrew