Nic Posted June 3, 2002 Share Posted June 3, 2002 Front seal again, it was originally replaced when I had the cams fitted as there was a slight leak. It is going back into the TRD garage tomorrow (a different garage to the one who fitted the seals before, the same hopeless garage that couldn't diagnose the overheating problem!) I'll find out if they can do the test, what is involved exactly? Pistons and rings! is that all and there was me thinking it was going to be something expensive:eek: I'll see if I can get the test done and let you know the results, cheers again Chris Nic Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 3, 2002 Share Posted June 3, 2002 Originally posted by Nic Front seal again, it was originally replaced when I had the cams fitted as there was a slight leak. It is going back into the TRD garage tomorrow (a different garage to the one who fitted the seals before, the same hopeless garage that couldn't diagnose the overheating problem!) I'll find out if they can do the test, what is involved exactly? Pistons and rings! is that all and there was me thinking it was going to be something expensive:eek: I'll see if I can get the test done and let you know the results, cheers again Chris Nic Engine (preferably hot / warm) is put at TDC with valves on a cylinder closed, then compressed air, vai an adaptor, is deployed into that cylinders spark plug hole. A guage reads the percentage that leaks away. if you hear it out the exhaust tailpipe it's an exhaust valve not sealing, or, with throttle wedged open, if you hear air leaking via the intake, it's an inlet valve. If you hear it out of the dipstick tube (dipstick removed) it's piston / ring trouble. there will ALWAYS be some blow by. i can build an F3 engine to show 1 or 2% leakage, I'd be happy with a road engine showing 10% or less, concerned at over 15%, and stripping it if it showed over 20%, although it may still run apparently half well with as much as 25% leakage. HTH. Quote Link to comment Share on other sites More sharing options...
Nic Posted June 3, 2002 Share Posted June 3, 2002 Just so I understand this correctly, if it is one or more of the cylinders leaking then this would pressurise the crank case which would cause the seal to blow. Everytime the seal has gone it has been when I have been out for a high speed/rpm run, this time it was to test the cooling system. Typical I get one problem fixed and cause another Perhaps it is time to sell up thanks Chris Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted June 3, 2002 Share Posted June 3, 2002 This oil seal problem has just come up on the American list again. They seem to think it's something to do with the sprung ring (sphincter ring they like to call it!!!!) coming out of it's seat; but nothing conclusive yet. For some before and after pics take a look at :- http://www.mkiv.com/mohd/tmp/crank_seal/ Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted June 7, 2002 Share Posted June 7, 2002 More front oil seal info. http://www.supraforums.com/showthread.php?threadid=49007&perpage=25&pagenumber=1 Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 7, 2002 Share Posted June 7, 2002 Originally posted by Martin F More front oil seal info. http://www.supraforums.com/showthread.php?threadid=49007&perpage=25&pagenumber=1 Usual US list total and utter drivel showing they have not the slightest grasp on the problem or how to avoid it. Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted June 7, 2002 Share Posted June 7, 2002 Yep lot of arguing (just like 'nam!). But did you not think the idea of a higher spec seal was a good one ? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 7, 2002 Share Posted June 7, 2002 Originally posted by Martin F Yep lot of arguing (just like 'nam!). But did you not think the idea of a higher spec seal was a good one ? Nah, they need to realise the silly boosts they run and the resulting det, together with stock cast pistons is causing a hell of a lot of blow by, presurrising the crankcase. The seals are meant to retain oil splash and very low, if any, pressure. Fix the cause, and the stock seals will be fine. there will be zero *OIL* pressure behind the seal, only gaseous pressure from blow by. Now the cars are getting older I predict a rash of stupid, over boosted faults to show up, in the US first, then here. The engine is NOT bullet proof, and certainly not idiot proof :-) Quote Link to comment Share on other sites More sharing options...
Alex Posted June 7, 2002 Share Posted June 7, 2002 Now the cars are getting older I predict a rash of stupid, over boosted faults to show up ............... .......... ..... .. . Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted June 7, 2002 Share Posted June 7, 2002 Originally posted by Alex Holdroyd ............... .......... ..... .. . Is that the sound of a boost controller going cheap i hear ? Quote Link to comment Share on other sites More sharing options...
Alex Posted June 7, 2002 Share Posted June 7, 2002 Of course not...well not till I destroy the engine its connected to!! Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted June 7, 2002 Author Share Posted June 7, 2002 Ok, so does anyone have a T78 installed ? Quote Link to comment Share on other sites More sharing options...
Alex Posted June 7, 2002 Share Posted June 7, 2002 'fraid not...well not on this board. HKS GT TWINS are about our limit. Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted June 7, 2002 Author Share Posted June 7, 2002 damnit, why so little ? also, why do you all bad mouth americans ? I am in America, New York, queens, we're not on our sites looking at what you guys are doing and mocking you. I'm not gonna say anything cuz so far most of you have been helping me out a lot. Quote Link to comment Share on other sites More sharing options...
GavinL Posted June 7, 2002 Share Posted June 7, 2002 Originally posted by PurpleHaZe damnit, why so little ? I suspect it's down too quite a few things: 1. Cost, probably even more expensive in the UK than it is in the US. 2. Drag racing isn't such a big thing in the UK. 3. Roads - UK roads are generally not very wide, not very straight and only very occasionally dry. I think people prefer cars that do well on the street not just in a straight line so we tend too stick to the more responsive stock twins. 4. There's a lot less Supra's in the UK than there is in the US. 5. We don't blow our turbo's up anywhere as much as you do in the US regards..... Quote Link to comment Share on other sites More sharing options...
Alex Posted June 7, 2002 Share Posted June 7, 2002 We're not dissin' (sp?) you guys but we do find that the playing field isn't all that level when comparing our cars / power claims. In a way we are jealous that you get all your stuff so god damn cheap...especially the fuel!!!!! But for the most part our Race Engineers in the UK are more impressed with finesse than sheer brawn. They prefer mods which last, which don't potentially need an engine re-build every few thousand miles... Anyway get your T78 and let us know how it goes...but I would go for the SP66/70 kit if I was you. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 7, 2002 Share Posted June 7, 2002 Originally posted by PurpleHaZe damnit, why so little ? also, why do you all bad mouth americans ? I am in America, New York, queens, we're not on our sites looking at what you guys are doing and mocking you. I'm not gonna say anything cuz so far most of you have been helping me out a lot. I try and help anyone out, so don't take it personally. I just find the US MKIV lists seem to have more than their share of blatantly incorrect info, and basically, bullshit :-) I find the best modders, and the most modest, apart from myself are the Ozzies and New Zealanders. The US listers all seem to be pleased if the car hangs together for a few runs down a drag strip, my judgement is if hangs together for 20 conscutive race speed laps of a proper race (road racing) circuit. My wife can build an engine that hangs together for a few 1/4 mile passes! As I said, nothing personal, just generalisation on my part. Quote Link to comment Share on other sites More sharing options...
eyefi Posted June 8, 2002 Share Posted June 8, 2002 Originally posted by Chris Wilson My wife can build an engine that hangs together for a few 1/4 mile passes! how much does she charge per hour for labour? Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted July 25, 2002 Author Share Posted July 25, 2002 sorry for bringing this thread back up, but my interest in the Jap Spec supra has returned. How hard is it to install the TRL limiter ? Can any basic mechanic install it ? thanks for the info. Quote Link to comment Share on other sites More sharing options...
Terminator Posted July 25, 2002 Share Posted July 25, 2002 Do you mean delimiter, if so it is an easy job just a few wires to connect. Check out the TRL site, deatils on there. Quote Link to comment Share on other sites More sharing options...
Justin Posted July 25, 2002 Share Posted July 25, 2002 Chief, if you can wire a domestic plug (240v or 110v) then you can install the delimeter no probs. http://www.trlperformance.com/dsc.html Quote Link to comment Share on other sites More sharing options...
Syed Shah Posted July 25, 2002 Share Posted July 25, 2002 Originally posted by PurpleHaZe sorry for bringing this thread back up, but my interest in the Jap Spec supra has returned. How hard is it to install the TRL limiter ? Can any basic mechanic install it ? thanks for the info. If I were you, I would worry about getting it certified road-legal in the US before you bother with delimiters and such. Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted July 27, 2002 Author Share Posted July 27, 2002 Originally posted by Syed Shah If I were you, I would worry about getting it certified road-legal in the US before you bother with delimiters and such. Don't worry, I got a way Quote Link to comment Share on other sites More sharing options...
Syed Shah Posted July 28, 2002 Share Posted July 28, 2002 Was that that stupid idea some 'kid' gave you? Quote Link to comment Share on other sites More sharing options...
Purplehaze Posted July 28, 2002 Author Share Posted July 28, 2002 Originally posted by Syed Shah Was that that stupid idea some 'kid' gave you? lol no doubt Quote Link to comment Share on other sites More sharing options...
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