Fulcrum2000 Posted July 1, 2019 Share Posted July 1, 2019 Hi All I've had a full rebuild on my 93 TT when it had the 'black death' and had a RMS leak ever since. It didnt leak before and the mechanic said the recon crank has a groove in it where it protrudes form the block and is allowing the RMS to leak. I dont know if this is nonsense and all cranks have this groove but it has been back 5 times to the mechanic who rebuilt it and its still leaking. I then took it to the best mechanic in town, an independent but who doesnt specialise in Supras, he had a go at it and it still leaked. So whilst I know the person who rebuilt it should do it I am sick of it and will happily pay someone who has experience to fix it once and for all. Is there anyone in the Lincolnshire area willing to do this? Also anyone who has had their crank out, can you confirm whether yours has a groove around it on the part the RMS goes on or not? This is a serious request from a desperate Supe owner, if you know of a quality mechanic in my area I'd love to know. Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 1, 2019 Share Posted July 1, 2019 Whats the RMS? Quote Link to comment Share on other sites More sharing options...
and1c Posted July 1, 2019 Share Posted July 1, 2019 Rear main seal Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 1, 2019 Share Posted July 1, 2019 Rear main seal Ah, thats not a small job! I could do it but it would take a loooong time as I work away so only have weekends to do it an sort my own life out Quote Link to comment Share on other sites More sharing options...
Frank Bullitt Posted July 1, 2019 Share Posted July 1, 2019 Badly worn flange on crank? Quote Link to comment Share on other sites More sharing options...
Fulcrum2000 Posted July 1, 2019 Author Share Posted July 1, 2019 If you remember Swampy it was me who bought cams from you for thisbut yes I just want someone to do it properly, if you're too busy I understand but is there anyone out there who works on Supes in my area? Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted July 1, 2019 Share Posted July 1, 2019 Just a thought, it might actually not be the seal, it may be the sump wasn't sealed properly, not any less work as you have to pull the engine either way. I dont know anyone who's familiar with the JZ locally Im afraid mate Quote Link to comment Share on other sites More sharing options...
Frank Bullitt Posted July 1, 2019 Share Posted July 1, 2019 Chris Wilson in Shropshire would probably be your closest. Quote Link to comment Share on other sites More sharing options...
PJJ Posted July 2, 2019 Share Posted July 2, 2019 I think you'll find most with tell you the same thing. It's better economy to pick a Supra specialist and if you have to travel to them then so be it for peace of mind. I use Garage Whifbitz - Some 7.5hour round trip from me. But this I would rather do than have another bad experience with someone who has not done the job right on my car in the first place. You'll pay over and over again doing that, like I did. For me I will travel to someone who I know will do the job properly on the first attempt. Quote Link to comment Share on other sites More sharing options...
Andy Ven Posted July 2, 2019 Share Posted July 2, 2019 Ok, so i have taken my RMS seal off so you can compare to mine. Engine has 130k miles on it and yes mine has a groove. Should it have a groove. No it shouldnt. But thats because the seal has worn the metal over a long period of time. Quote Link to comment Share on other sites More sharing options...
Fulcrum2000 Posted July 3, 2019 Author Share Posted July 3, 2019 Thanks so much yes other than being pretty much perfectly central that is exactly how both the one I put on and the one that came off have. So it is a weakness of the car (and in fact any car of my kind of age). I've tried the sleeve available to cover over this and it actually increased the leak slightly. I spoke to Chris Wilson and went back to the mechanic to check it had no other likely causes that Chris said were likely like baffle plates with carbon in etc and its all been done to the same standard as he suggested so it comes down to whether or not I can find some way of making the seal, well, seal. I guess there isnt a high tension one anywhere does anyone know? I know there is a FMS one which is upgraded but I dont know of a RMS one? Quote Link to comment Share on other sites More sharing options...
Andy Ven Posted July 3, 2019 Share Posted July 3, 2019 So you have two options. Both will seal just as well as each other but one will look ascetically right and the other wont. Option 1. Use the same size seal you currently have (viton material should be a brown colour) and seat it 3mm inwards of where it currently sits. Ie, at the moment it will sit flush with the plate it is housed in. Sit it 3mm further back. This will then seal on a fresh part of the crank shaft and will not cause any issues. Option 2. Use a slightly wider seal. Aka seal size is currently 60x90x5. You would get a 60x90x8. So 3mm wider seal. Sit this flush with the housing plate and it will seal fine and look correct from the outside. The seal lip will be further back because it is a wider seal so wont be where the groove is. Option 1 will work with a seal you currently have but will be sat back slightly Option 2 will need a new seal buying (again viton material) but 3mm deeper. This will look correct from the outside sitting flush. Hope this helps. Andy Quote Link to comment Share on other sites More sharing options...
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