Chris Wilson Posted July 24, 2010 Share Posted July 24, 2010 Got a single turbo VVTi in with a horrible noise from the VVTi pulley / solenoid area, and it runs like a bag of whatsit. I am 80% sure the VVTi pulley assembly is knackered, and was wondering how much a new pulley and / or solenoid would be from Toyota? Has anyone had trouble with theirs? Has anyone got the part numbers for these bits? Thanks. Secondly, is this supposed to be a pulse width modulated set up, with full control of advance and retard of the inlet cam, or is it an on / off set up, where it's either retarded or not, to a fixed degree? I suspect under certain conditions the inlet cam timing is doing its own thing right now Quote Link to comment Share on other sites More sharing options...
JODY T Posted July 25, 2010 Share Posted July 25, 2010 its variable wat sort of noise is it making? ive got a random noise from my vvti, trying to locate it.. car seems to be fine though, goes well enough Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 25, 2010 Author Share Posted July 25, 2010 Rattling clicking noise very evident with a stethoscope on the solenoid. Dissconnecting the electrical connector to the solenoid makes no difference, so it must be mechanical. Quote Link to comment Share on other sites More sharing options...
J_Boulton Posted July 25, 2010 Share Posted July 25, 2010 Chris, this might help us... http://www.newcelica.org/forums/showthread.php?p=4473072 Looks like Celica owners have the same issue and this guy cured it with an intake cam gear replacement. Interesting what they say about the OCV as well including what should happen when power is applied to it. And it all seems to point to what you were saying about timing being all over the place too, particularly if that locking pin is not doing the business. JB Quote Link to comment Share on other sites More sharing options...
JODY T Posted July 26, 2010 Share Posted July 26, 2010 Chris if you get the retail prices for these parts could you post them on here.. Ide be interested to find out.. Might be worth tryin a new set on mine Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 26, 2010 Author Share Posted July 26, 2010 Still not got a part number, will try Toyota now. ..... Who say, no Supra VVTi was ever made, upon which I insist they look, and lo and behold they find it. 5 different pulley assemblies, dearest being £125 plus VAT, and the OCV controller unit is £88 plus VAT. All are available from Belgium. If you are reading this Julian, shall I order them up?? The prices are FAR less than I imagined, I had £500 plus in mind for this stuff. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 26, 2010 Author Share Posted July 26, 2010 Ordered, here in two days from Belgium. Will dismantle the old units for a look see when I have the new ones and let you all know what I find. Quote Link to comment Share on other sites More sharing options...
JODY T Posted July 26, 2010 Share Posted July 26, 2010 Ah that's not too bad is it, think I'll order them up when got some spare cash.. Let us know what u fund when u dismantle them.. Thanks Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 29, 2010 Author Share Posted November 29, 2010 Just remembered I never replied to this, having Julian's car in recently jogged my memory. The old VVTi pulley was stuck, looked like it may have been dirt ingress, hard to tell. If freed off after disassembly. Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 29, 2010 Share Posted November 29, 2010 Would this be a common thing would you say chris? Ive heard a few cases of clicking vvti pulleys before and always assumed it was a common fault. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 29, 2010 Author Share Posted November 29, 2010 Well, it's the first one I have come across, but the engine has had lots of fiddling with and mods done to it. Personally, if you are heavily modding a 2JZ, I think the VVTi is not a good base engine. Quote Link to comment Share on other sites More sharing options...
Kirk Posted November 29, 2010 Share Posted November 29, 2010 Realy? I would of thought with the addition of vvti it would have a bit of an advantage over the non vvti. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted November 29, 2010 Author Share Posted November 29, 2010 I think the mapping permutations with even one variable timing cam are so great that it might be easier to start with an engine with a wide choice of cams and forget the VVTi, rather than be limited in cam choice, and also have to potentially spend a huge amount of time optimising the cam timing for all conditions. This assumes it's mainly a road car, and modded to say a single turbo with different camshafts. I am told the stock mapping for the VVTi is a LOT more complex than one might think. Quote Link to comment Share on other sites More sharing options...
Miguel Posted December 3, 2010 Share Posted December 3, 2010 Would this be a common thing would you say chris? Ive heard a few cases of clicking vvti pulleys before and always assumed it was a common fault. It's going to get more common now the cars are starting to age. I've replaced a couple in the past (thread somewhere on it), quite a susceptible unit, even more so on an uncared for vehicle. The system has its advantages, but as Chris says, I would be more inclined to stick with the simplicity of pre-VVTi engines if planning large mods. Quote Link to comment Share on other sites More sharing options...
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