Guest Draven Posted June 16, 2006 Share Posted June 16, 2006 Well, at 52,000kms my timing belt has just snapped on my supra (or the tensioner is gone, same end result) - about 48,000 earlier than I expected, and 20,000 before I would even have thought of checking it. Bollocks to toyota reliability! Anyways, being a 2jz-gte vvti, I had heard rumours that this was an interference engine (a rarity for toyota), and this leads me to worry that snapping my timing belt may have results in my pistons happily bumping pelvises with my valves - can you guys confirm/discredit this for me? Should I be ripping my engine apart and crying, or just replace the timing belt? Cheers fellas, Greg Quote Link to comment Share on other sites More sharing options...
Faye Posted June 16, 2006 Share Posted June 16, 2006 If I remember correctly its only the NA VVTi that is an interference engine. Quote Link to comment Share on other sites More sharing options...
Guest Draven Posted June 16, 2006 Share Posted June 16, 2006 That would make me a very happy man Faye... can anyone confirm this? I don't especially have thousands lying around for new pistons/valves Quote Link to comment Share on other sites More sharing options...
Miguel Posted June 16, 2006 Share Posted June 16, 2006 Yup TT VVti is non interference as it has the same lift as non VVTi TT. So piston to valve clearance is OK. So slap a belt on it and have fun ahain and let us all know the good news Quote Link to comment Share on other sites More sharing options...
Guest Draven Posted June 16, 2006 Share Posted June 16, 2006 well, if you guys were in the same country as me I'd offer copious amounts of man-love. I'm now a very happy camper! still a PITA to fix, but not as much, and not nearly as expensive Quote Link to comment Share on other sites More sharing options...
Miguel Posted June 16, 2006 Share Posted June 16, 2006 Easy tiger ..I'm sure Faye would apreciate the man love more than I would I'll suffice with a victory whoohoo when your done Quote Link to comment Share on other sites More sharing options...
Guest Draven Posted June 16, 2006 Share Posted June 16, 2006 I'm a toymods boy, so the love-spreading is not gender specific Quote Link to comment Share on other sites More sharing options...
Pete Posted June 16, 2006 Share Posted June 16, 2006 As they say is correct from what I've heard. I've always wondered if it was true through out the entire cam profile. I shall watch with interest. Quote Link to comment Share on other sites More sharing options...
geoffvalenti Posted June 16, 2006 Share Posted June 16, 2006 As they say is correct from what I've heard. I've always wondered if it was true through out the entire cam profile. I shall watch with interest. Hi Pete Do you mean, throughout the entire cam profiles of the Supra range of engines, or are we talking VVTi specific. The VVTi cars don't vary the lift, only the timing, so basically if it clears when the piston is at TDC, and the valve fully open, varying the timing makes no odds Quote Link to comment Share on other sites More sharing options...
b_have Posted June 16, 2006 Share Posted June 16, 2006 Are they still non-inters with HKS 264's? Quote Link to comment Share on other sites More sharing options...
LeeT Posted June 16, 2006 Share Posted June 16, 2006 Are they still non-inters with HKS 264's? apparently yes. i think it was anything above 272,s then it became a problem Quote Link to comment Share on other sites More sharing options...
Pete Posted June 16, 2006 Share Posted June 16, 2006 The VVTi cars don't vary the lift, only the timing, so basically if it clears when the piston is at TDC, and the valve fully open, varying the timing makes no odds Ah yes, that would make sense. Quote Link to comment Share on other sites More sharing options...
Jake Posted June 16, 2006 Share Posted June 16, 2006 Well, at 52,000kms my timing belt has just snapped on my supra (or the tensioner is gone, same end result) - about 48,000 earlier than I expected, and 20,000 before I would even have thought of checking it. Bollocks to toyota reliability! The cam belt is supposed to be changed every five years, regardless of mileage. Or do you have one of the few 2002 Supras? Quote Link to comment Share on other sites More sharing options...
Supe Posted June 16, 2006 Share Posted June 16, 2006 Had a look at my timing belt today, as I don't know when it was done, it looks kind of new. It has Toyota and a series of numbers printed in white on the belt. So I am assuming it has been done at some point as it looks newish . While Im here, is the 2JZ-GTE 1994 a non-interference engine? Cheers Quote Link to comment Share on other sites More sharing options...
Paul Posted June 16, 2006 Share Posted June 16, 2006 The cam belt is supposed to be changed every five years, regardless of mileage. Yeah, had mine done at five yrs regardless of mileage, can't slag Toyota off for this happening if it's over that time. Paul Quote Link to comment Share on other sites More sharing options...
Miguel Posted June 16, 2006 Share Posted June 16, 2006 Had a look at my timing belt today, as I don't know when it was done, it looks kind of new. It has Toyota and a series of numbers printed in white on the belt. So I am assuming it has been done at some point as it looks newish . While Im here, is the 2JZ-GTE 1994 a non-interference engine? Cheers Yup Quote Link to comment Share on other sites More sharing options...
Guest Draven Posted June 17, 2006 Share Posted June 17, 2006 The cam belt is supposed to be changed every five years, regardless of mileage. Or do you have one of the few 2002 Supras? Alas, no it's a 2000 model and I wasn't slagging off at toyota - they've treated me very well. it more makes me wonder about the previous owner. While he took immaculate care of the interior, I don';t think the engine received quite as much TLC Quote Link to comment Share on other sites More sharing options...
Guest Draven Posted June 20, 2006 Share Posted June 20, 2006 and after removing the crank pulley, I found the reason the belt snapped so early: http://www.users.bigpond.net.au/draven/supra/crank_timing.jpg either someone dropped a screw in there, or a rock managed to find its way in.. any way you look at it, new timing belt and new crank timing pulley Quote Link to comment Share on other sites More sharing options...
LeeT Posted June 20, 2006 Share Posted June 20, 2006 and after removing the crank pulley, I found the reason the belt snapped so early: [qimg]http://www.users.bigpond.net.au/draven/supra/crank_timing.jpg[/qimg] either someone dropped a screw in there, or a rock managed to find its way in.. any way you look at it, new timing belt and new crank timing pulley looks like someones beat that with a hammer and chisel:( Quote Link to comment Share on other sites More sharing options...
Jake Posted June 20, 2006 Share Posted June 20, 2006 I've got a spare one of those pulleys from a VVTi engine if you need one. £20 collected £25 delivered Quote Link to comment Share on other sites More sharing options...
Ian W Posted June 20, 2006 Share Posted June 20, 2006 looks like someones beat that with a hammer and chisel:( being the least mechanically minded person on the planet, i can't actually see what's wrong with it Quote Link to comment Share on other sites More sharing options...
Alex Posted June 20, 2006 Share Posted June 20, 2006 I've got a spare one of those pulleys from a VVTi engine if you need one. £20 collected £25 delivered I think he'll need it delivered....and it won't cost £5! Quote Link to comment Share on other sites More sharing options...
Alex Posted June 20, 2006 Share Posted June 20, 2006 The 2JZ-GTE in all guises becomes an interference engine when using over 10mm's of lift on the cam. All standard HKS/JUN cams are non-interference - how ever the JUN 10.8mm lift 272 special order jobbies are obviously interference ones. The above assumes standard pistons and compression Quote Link to comment Share on other sites More sharing options...
Digsy Posted June 20, 2006 Share Posted June 20, 2006 and after removing the crank pulley, I found the reason the belt snapped so early: http://www.users.bigpond.net.au/draven/supra/crank_timing.jpg either someone dropped a screw in there, or a rock managed to find its way in.. any way you look at it, new timing belt and new crank timing pulley Does the engine have the stock timing belt covers in place? Quote Link to comment Share on other sites More sharing options...
LeeT Posted June 20, 2006 Share Posted June 20, 2006 being the least mechanically minded person on the planet, i can't actually see what's wrong with it There's a chip out of the teeth on the toothed pulley Quote Link to comment Share on other sites More sharing options...
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