Boydie Posted February 3, 2013 Share Posted February 3, 2013 Comrades, I've just had my second 100amp alternator fail, it would seem that the rectifier/diode pack is overheating, I've noticed on some exploded engine drawings that there was a heatshield fixed to the rear of the alternator to shield it from the turbo, does this come only with a Bosch unit (which I believe were the original units) or do they fit any Land Rover 100 amp Disco alternator and if so are they readily available. Quote Link to comment Share on other sites More sharing options...
dooroy Posted February 3, 2013 Share Posted February 3, 2013 I think I remember reading somewhere that the 300 Tdi alternator draws air in from the back and this makes the fitting of a heatshield important . Have a look at this http://www.quicksales.com.au/ad/alternator-heatshield-300tdi-land-rover-discovery-defender-r/4792739 Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted February 3, 2013 Share Posted February 3, 2013 They are quite flimsy things and the parts where the bolt holes are tend to break off after a while, I'd be tempted to fab my own one up if facilities are available and of course you could then make it to fit whichever alternator you are running. Quote Link to comment Share on other sites More sharing options...
Boydie Posted February 3, 2013 Author Share Posted February 3, 2013 Yeppers, I have one on order as of this morning along with a replacement diode pack and a new alternator, the old will do nicely as a spare, and yes, the Nippon Denso alternator seems to be designed to draw air through the windings from rear to the front pulley so cooling the diode pack first and the windings second, ( I confirmed this with the byproduct of a very fine H.Uppman Magnum 46 cuban cigar) so yes, the air would, if the heatshield were not fitted draw air off the turbo manifold whereas with the heatshild the air is drawn from the side/top. Quote Link to comment Share on other sites More sharing options...
Boydie Posted February 13, 2013 Author Share Posted February 13, 2013 Okay internet people, I purchased the Land Rover heat shield, and guess what ???? Yeppers it wont fit my Denso / Magnetti alternator -- simply no way will the fixing holes line up to any of the bolts even with long extensions. My guess is it will only suit a Bosch unit, (which I believe were original equipment) can anyone enlighten me on this please? Quote Link to comment Share on other sites More sharing options...
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