vanessa Posted January 21, 2006 Share Posted January 21, 2006 Hi, I've been reading up on rebuilding my 2.25 petrol with a view to finding out how much it is likely to cost me . Generally the prices of parts seem quite reasonable but I don't understand why I need to replace the bolts for the bigend bearings. Can anyone advise me ? oh its a 5mb by the way. Thanks Quote Link to comment Share on other sites More sharing options...
rtbarton Posted January 21, 2006 Share Posted January 21, 2006 Hi, I've been reading up on rebuilding my 2.25 petrol with a view to finding out how much it is likely to cost me . Generally the prices of parts seem quite reasonable but I don't understand why I need to replace the bolts for the bigend bearings. Can anyone advise me ? oh its a 5mb by the way. Thanks They are very highly stressed components and failure would completely wreck the engine - better safe than sorry. Replace the nuts too! Quote Link to comment Share on other sites More sharing options...
vanessa Posted January 21, 2006 Author Share Posted January 21, 2006 They are very highly stressed components and failure would completely wreck the engine - better safe than sorry. Replace the nuts too! .......................Would the same apply to the main bearing bolts as these are quite substantial........? Quote Link to comment Share on other sites More sharing options...
western Posted January 21, 2006 Share Posted January 21, 2006 If your not 110% happy with them, then fit new parts. Quote Link to comment Share on other sites More sharing options...
Phil Hancock Posted January 21, 2006 Share Posted January 21, 2006 Hi, I've been reading up on rebuilding my 2.25 petrol with a view to finding out how much it is likely to cost me . Generally the prices of parts seem quite reasonable but I don't understand why I need to replace the bolts for the bigend bearings. Can anyone advise me ? oh its a 5mb by the way. Thanks The rover manual does NOT require the big end or main bearing bolts to be changed during an overhaul on any of the 2.25 engines or LR 2.5, only big end nuts. Obviously if any are damaged then they will require replacing. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted January 21, 2006 Share Posted January 21, 2006 Why do it by halves? If you're rebuilding it, why put used bits back in - unless the nuts/bolts are really pricey (I rather doubt that) then surely having all new bits would be preferable? Quote Link to comment Share on other sites More sharing options...
vanessa Posted January 21, 2006 Author Share Posted January 21, 2006 Why do it by halves? If you're rebuilding it, why put used bits back in - unless the nuts/bolts are really pricey (I rather doubt that) then surely having all new bits would be preferable? ...............Hi Fridge freezer, the bolts are actually a bit on the pricey side........... £ 150 for a full set !!!!! ( including the washers ) Quote Link to comment Share on other sites More sharing options...
isuzurover Posted January 23, 2006 Share Posted January 23, 2006 The rover manual does NOT require the big end or main bearing bolts to be changed during an overhaul on any of the 2.25 engines or LR 2.5, only big end nuts. Obviously if any are damaged then they will require replacing. Exactly, I have rebuilt a few 2.25s (petrol and diesel), and have never replaced any big end bolts. If the bolts have not been overtorqued they should be under the elastic limit and so should be fine. I have never had (or seen) a big end bolt or nut fail. Why replace something that doesn't need replacing??? Quote Link to comment Share on other sites More sharing options...
torrentace Posted January 23, 2006 Share Posted January 23, 2006 The rover manual does NOT require the big end or main bearing bolts to be changed during an overhaul on any of the 2.25 engines or LR 2.5, only big end nuts. Obviously if any are damaged then they will require replacing. ........I beg to differ as on the 5mb engines with the prefix 361.......the Rover manual clearly states that the main bearing bolts must be replaced. Indeed they put great emphasis on this point. It may well be that you can get away with not replacing them,. Quote Link to comment Share on other sites More sharing options...
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