danebrewer Posted June 18, 2012 Share Posted June 18, 2012 Hi all, slowly going theough the things to do on my engine conversion, the flywheel from the 2.5 NAD has a small groove on it, obviously something got stuck on the friction material and scored a line on the flywheel somewhere down the line (but otherwise in good shape), and the teeth on the ring gear are a little dog eared from the years of starting. the flywheel from the 300 is nice and smooth as well as the teeth being all nice and sharp as they should be are the two compatible: i.e. do the have the same diameter and number of teeth/tooth angle all the rest of it, parts book says they have different part numbers but I was just wonderin' and I don't think I'll be able to stay sane long enough to count all of the teeth on both flywheels! or I'm just being lazy.....probably Quote Link to comment Share on other sites More sharing options...
western Posted June 18, 2012 Share Posted June 18, 2012 ring gear is the same http://www.lrseries.com/shop/product/listing/1397/568431-RING-GEAR-DIESEL.html?search=568431&page=1[ part numbers] clutch friction plate is the same size as the pressure cover is common to all the diesel 4 cylinder engines & I suspect the 4 cyl petrol engine too. hth Quote Link to comment Share on other sites More sharing options...
Daan Posted June 18, 2012 Share Posted June 18, 2012 it does fit, the only difference is that the groove which you need to set the timing is now 45 degrees out- which means you cannot set the pumptiming correctly. Daan Quote Link to comment Share on other sites More sharing options...
reb78 Posted June 18, 2012 Share Posted June 18, 2012 What about using the corresponding flywheel housing as well? I think they are all interchangeable (plus or minus a few studs)? Quote Link to comment Share on other sites More sharing options...
western Posted June 18, 2012 Share Posted June 18, 2012 300tdi rear seal is different, if the 'new' flywheel is fitted with the engine/pump timed correctly a suitable timing mark can be painted or etched on to the tdi flywheel edge. Quote Link to comment Share on other sites More sharing options...
gruntus Posted June 19, 2012 Share Posted June 19, 2012 Play a bit of caution there. I tried to do the same with my 2.5 TD flywheel with the 200TDi flywheel and IIRC Daan's comment holds true. The flywheel gets held in place with a locking device held in the groove (I used a drill through a wading plug) with the timing then set on the pump. As Ralph states the timing could be set with a marker and with the engine out of the vehicle it would be ok. I wouldnt however like to have to do the timing again on the vehicle in the future as a couple of degrees out could leave you chasing your tail and a lot of uncertainty. Just my penith worth. G Quote Link to comment Share on other sites More sharing options...
western Posted June 19, 2012 Share Posted June 19, 2012 you could have the flywheel skimmed by a local machine shop or engine tuners & they should be able to source/fit a new ring gear too. Quote Link to comment Share on other sites More sharing options...
farmerboy_y2k Posted June 19, 2012 Share Posted June 19, 2012 Presumably your conversion is 300tdi into 2.5NAD? I'd keep the 300tdi flywheel and housing. just remove the couple of studs which don't lineup with the bellhousing holes and drill out and tap the bottom of the flywheel for the bottom stud. Then you can time the engine correctly in the future as well. Quote Link to comment Share on other sites More sharing options...
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