i brought my 1st rx back in december as a non runner due to clutch problem also knowing that the engine was in need of a rebuild i changed the clutch and the car ran but drove poorly hesistation and lots of backfiring and drinking water so a few weeks ago i decided to remove the engine and strip down and eventually rebuild when ive saved up enough cash. the turbos had lots of up and down movement and once the engine was cracked open the condition was poor also. the rotors themselfs have lots of detonation on them but no major scores dents is the det usual? the waterseals had failed and in the water ports i came across alot of small looking stones/ grit what was that caused by? the housings have some scores and will need to be replaced and the plates need to be relapped does anyone know somewhere in the uk that does this? but after getting the engine opened up it seems like the engine has not been rebuild for some time or even at all and poorly looked after and lack of anti freeze.
small grit might be something like k-seal? det marks on rotors shudnt really be there if the engines running well. dont recommend lapping plates as hard to get a finish thats square to the bearings and if they take off too much u go past hardened layer
Any of our professional Rotary rebuilders will be able to either do this for you or get this done,
The grit your seeing is probably just hard sediment bits that have built up in the cooling system over the years , its not uncommon to see this as slag flakes
You got any pics you can post? I do all my own work, but I normally take the bits I\'m about to use to one of the guys that lives and breathes rotary for a final opinion.
Opinion does seem divided on lapping. Some people do, some don\'t. Have you got a dial gauge to check the depth of the scoring on the plates? It _shouldn\'t_ be hard to get them lapped true - the plates have machined surfaces on both sides don\'t forget. Any competent machinist will be able to set a machine up so that the deck stays flat and true. The thickness of the coating is a different matter, however.