Posted by peter r on August 3, 2009, 11:11 pm, in reply to "4.6 Engines"
144.139.163.209

G`day Pat , not good and i`m no help , don`t know the age of your new 4.6 but ... On later 4.0 and 4.6 the book says there is no need to check the height setting . It says engines up to 42D00593A and up to 46D00450A need to have the height setting done . The book also says the height setting is to " prevent drive plate distortion " . As for the crank end float which is given as 0.10 to 0.20 mm , the book says .. Crankshaft end float is controlled by thrust faces on upper half of centre main bearing shell . ( Note it says centre ) So if the theory of External Force from gearbox side is correct , if the centre bearing limits end float wouldn`t that be the place the problem would be more obvious ? The Book is .... 3.5 , 3.9 , 4.0 , 4.2 & 4.6 V8 Petrol Engines Overhaul Manual Publication Numbers LRL 0164 and LRL 0004 The part used is from the 4.0 & 4.6 Manual Land Rover UK Limited 1997/98 and Brooklands Books 1999 . Cheers --Previous Message-- : Hi Blokes : As you probably now know the "NEW" : 4.6 engine which has done an astounding : 9,825 Kilometers and now shit itself (a real : piece of endurance work). We had the autopsy : done on it today here in WA instaed of : sending it back to Victoria to where I : bought it from, it turns out that every main : bearing except for one or two has had : something through it and the rear thrust : bearing on the crank has about a millimeter : of metal missing off it's surface, most of : the big ends are stuffed as well. : Although I have not yet discussed the : results of the autopsy with the people I : purchased the engine from to any real depth : it appears highly unlikley that it will be : claimable on warranty. Being that the rear : thrust bearing has failed which they say is : due to an "EXTERNAL FORCE" being : applied to the crankshaft from the gearbox : side and that I probabably have not coupled : the motor and gearbox together correctly : which is not true as we check and double : checked the measurement for the proper : clearance. : : Anyway at this point in time I would like to : know if any of you have bought a 4.6 motor : and had a similar failure with it. : Please get back to me if you have as I am at : a loss (so is the autopsy expert) as to what : has caused this failure. : : Regards:- Patrick M. :