Golddigga Posted March 29, 2007 Share Posted March 29, 2007 I have read alot on here regarding the fact that most Soops have a non-interference engine and therefore if the cambelt snaps [sHOCK][/sHOCK] You can just put a new one on and off you go [GRIN][/GRIN] My question is, has anybody on here actually done this? Quote Link to comment Share on other sites More sharing options...
Lucifer Posted March 29, 2007 Share Posted March 29, 2007 The theory is correct, non interfearance for the STOCK TT engine. Accept:- 1. Running alto of boost with weak valve springs 2. Weak valve springs 3. Higher compression pistons 4. Head skimmed past tollerance 5. Miss adjusted timing Hoep this helps. ONLY buy a toyota belt. Quote Link to comment Share on other sites More sharing options...
Golddigga Posted March 29, 2007 Author Share Posted March 29, 2007 What about for the N/A? Quote Link to comment Share on other sites More sharing options...
Lucifer Posted March 29, 2007 Share Posted March 29, 2007 Interfearance unless you are Seriously Lucky - but Extremly unlikley. Quote Link to comment Share on other sites More sharing options...
Pete Posted March 29, 2007 Share Posted March 29, 2007 All stock are non interference see - http://www.mkivsupra.net/vbb/showthread.php?t=72829&highlight=interference EXCEPT! The VVTi NA engine is apparently interference. I can't find the official doc I had that told me this I'm afraid. Quote Link to comment Share on other sites More sharing options...
SUPRASUZUKI Posted March 29, 2007 Share Posted March 29, 2007 5. Miss adjusted timing QUOTE] Mate, you can't get any more 'miss adjusted' than that resulting from a broken belt! Quote Link to comment Share on other sites More sharing options...
JustGav Posted March 29, 2007 Share Posted March 29, 2007 All stock are non interference see - http://www.mkivsupra.net/vbb/showthread.php?t=72829&highlight=interference EXCEPT! The VVTi NA engine is apparently interference. I can't find the official doc I had that told me this I'm afraid. Correct, unless running aftermarket cams, anthing more than 264 I believe will become interference. Quote Link to comment Share on other sites More sharing options...
Golddigga Posted March 29, 2007 Author Share Posted March 29, 2007 So, I have an M plate 1994 N/A Supra - Do I take it from the replies that my engine is non-interference? Quote Link to comment Share on other sites More sharing options...
JustGav Posted March 29, 2007 Share Posted March 29, 2007 So, I have an M plate 1994 N/A Supra - Do I take it from the replies that my engine is non-interference? Correct... but don't slip into a confidence factor, make sure you do keep the cambelt in good shape, and changed when required. Quote Link to comment Share on other sites More sharing options...
Guest mk47 Posted March 29, 2007 Share Posted March 29, 2007 So, I have an M plate 1994 N/A Supra - Do I take it from the replies that my engine is non-interference? dont let it get to the point where you have to find out but yeah it should be non interferance Quote Link to comment Share on other sites More sharing options...
Lucifer Posted March 29, 2007 Share Posted March 29, 2007 N that case you have to ask yourself why there is so little piston to valve clearance and why the pistons are machined with valve pockets so large and so close to the piston bottom. Good luck anyway. Quote Link to comment Share on other sites More sharing options...
Golddigga Posted March 29, 2007 Author Share Posted March 29, 2007 Thanks guys. Basically I have a silver stick on my cambelt cover with some Japanese writing on it and 100km written on it, which equates to 60k miles. A previous thread when I first got the car seemed to suggest that this indicated that the belt may have been changed when imported, which would fit with the mileage when it came in. I am now on 88k miles and only use the car at weekends so mileage is low. Cash is a bit tight at the mo and I was just trying to assess my risk! Thanks again. Quote Link to comment Share on other sites More sharing options...
JustGav Posted March 29, 2007 Share Posted March 29, 2007 Thanks guys. Basically I have a silver stick on my cambelt cover with some Japanese writing on it and 100km written on it, which equates to 60k miles. A previous thread when I first got the car seemed to suggest that this indicated that the belt may have been changed when imported, which would fit with the mileage when it came in. I am now on 88k miles and only use the car at weekends so mileage is low. Cash is a bit tight at the mo and I was just trying to assess my risk! Thanks again. The proper toyota belt should be good for around 60k miles / 5 years.. If it indeed has had a change at 100k kilo's... then you should be okay for a while. For peace of mind have a look at the belt and ensure that it hasn't frayed or looks damaged in anyway. Quote Link to comment Share on other sites More sharing options...
Golddigga Posted March 29, 2007 Author Share Posted March 29, 2007 N that case you have to ask yourself why there is so little piston to valve clearance and why the pistons are machined with valve pockets so large and so close to the piston bottom. Good luck anyway. Sorry with my non-tech brain - what does this mean? Quote Link to comment Share on other sites More sharing options...
Lucifer Posted March 29, 2007 Share Posted March 29, 2007 Sorry with my non-tech brain - what does this mean? NOthing if your non techie. It was aimed at other replies. Quote Link to comment Share on other sites More sharing options...
JustGav Posted March 29, 2007 Share Posted March 29, 2007 NOthing if your non techie. It was aimed at other replies. Care to elaborate? Quote Link to comment Share on other sites More sharing options...
Alex Posted March 29, 2007 Share Posted March 29, 2007 For the TT engine. You need to have a valve being pushed 10mm's at TDC for a stock engine to become interference. AFAIK the only cams on the market to do this are the JUN 272 10.8mm lift cams. Obviously if you change the head for a skimmed one you reduce the point at which intereference can happen... Quote Link to comment Share on other sites More sharing options...
Golddigga Posted March 29, 2007 Author Share Posted March 29, 2007 hhhhmmmmmm. Beginning to think I shouldn't have started this one off now. Basically it looks as if though if the worst happened and the belt broke I would be ok with my stock N/A.......and then again I could be f**ked. Oh well Quote Link to comment Share on other sites More sharing options...
Alex Posted March 29, 2007 Share Posted March 29, 2007 I should have mentioned that I'm talking about the TT... Edited above. Quote Link to comment Share on other sites More sharing options...
Golddigga Posted March 29, 2007 Author Share Posted March 29, 2007 So with an N/A I am definately ............ (Please insert correct comment from list below) 1) OK 2) F**ked I think I will try and replace the belt as soon as I can. Thanks Quote Link to comment Share on other sites More sharing options...
Lucifer Posted March 29, 2007 Share Posted March 29, 2007 I should have mentioned that I'm talking about the TT... Edited above. Absolutly, but when wer were building the high compression NA, there was virtually zero valve pocket left to start with. Quote Link to comment Share on other sites More sharing options...
Alex Posted March 29, 2007 Share Posted March 29, 2007 So with an N/A I am definately ............ (Please insert correct comment from list below) 1) OK 2) F**ked I think I will try and replace the belt as soon as I can. Thanks Standard engine = 1) OK. Quote Link to comment Share on other sites More sharing options...
Sheefa Posted March 29, 2007 Share Posted March 29, 2007 So with an N/A I am definately ............ (Please insert correct comment from list below) 1) OK 2) F**ked 3) Slower than a TT I think I will try and replace the belt as soon as I can. Thanks Number 3 mate Quote Link to comment Share on other sites More sharing options...
JustGav Posted March 29, 2007 Share Posted March 29, 2007 As extracted from the Maintenance and Service information from Toyota.... As you can clearly see the 2jz-gte(TT) and 2jz-ge (NA), are NOT listed with a (2) next to them, ie they are not interference engines. So, golddigga, don't panic.... And here is some more proof (Should that not be sufficient for some people).. http://www.mkivsupra.net/vbb/showpost.php?p=1176150&postcount=6 http://www.mkivsupra.net/vbb/showthread.php?t=88804&highlight=interference http://www.mkivsupra.net/vbb/showthread.php?t=2480&highlight=interference Quote Link to comment Share on other sites More sharing options...
Golddigga Posted March 29, 2007 Author Share Posted March 29, 2007 Number 3 mate I get the feeling you don't like N/As which is a pity. However, thanks for the comments. Quote Link to comment Share on other sites More sharing options...
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