Barry Posted July 1, 2004 Share Posted July 1, 2004 If an actuator fails, it doesn't / cant lock the wastegate shut! (as Paul said earlier). It will be the spring that fails, which means the wastegate will open earlier or always be open, which means no boost (or very little) will be seen. Sounds like a very lame excuse from the supplier if you ask me! Link to comment Share on other sites More sharing options...
Ian C Posted July 1, 2004 Share Posted July 1, 2004 Paul, why didn't you just say "I've only had two sets and they are both OK"? That was all Terry and anyone else needed to hear, I don't know how you got any other impression from the content of this thread - it's been far from questioning your integrity! And supplying a link to the discussion in your section would have helped as well, I don't frequent there looking for technical information and I'm sure others don't either, so here it is for those watching: Miami hybrid turbo thread I don't think introducing conspiracy theories against JPS is helping the technical nature of this in the slightest. If JPS supplies 95% of these turbo's they are going to see a proportional amount of the failures. I remain unconvinced about the failed actuator explanation so far. There is no reports of any actuators failing on the 2JZ, which has four, apart from these ones causing one manufacturer's hybrid turbo's to fail. And then they independantly test OK. -Ian Link to comment Share on other sites More sharing options...
Ian C Posted July 1, 2004 Share Posted July 1, 2004 Originally posted by Barry If an actuator fails, it doesn't / cant lock the wastegate shut! (as Paul said earlier). It will be the spring that fails, which means the wastegate will open earlier or always be open, which means no boost (or very little) will be seen. Sounds like a very lame excuse from the supplier if you ask me! If the membrane that the boost pressure pushes against tears, holes, or detaches in some way the wastegate will remain closed. It's a plausible reason in isolation, but not when the only reported actuator failures over the years are these ones... -Ian Link to comment Share on other sites More sharing options...
Barry Posted July 1, 2004 Share Posted July 1, 2004 Ian, I did think of that, but I've 'never' heard of that happening, ever! I dont think it does use a membrane that can split or tare, remember it has to be able to push a spring, and a rubber membrane will be no good in that case! Link to comment Share on other sites More sharing options...
Ian C Posted July 1, 2004 Share Posted July 1, 2004 Yeah, well, I've never heard of one going either. I think that's the point Actually, Terry had a duff one in a HKS wastegate but that was DOA, not a failure-in-use. -Ian Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 1, 2004 Share Posted July 1, 2004 Barry I did have an HKS wastegate with a punctured membrane, but that was down to the numpty turbo kit manufacturer drilling a hole through it whilst installing a hose outlet. The only way I can see on a stocker is if the membrane deteriorates, but not very Toyota is it. Link to comment Share on other sites More sharing options...
STEVE C Posted July 1, 2004 Author Share Posted July 1, 2004 Originally posted by Terry S The last set leon had back was blamed on an actuator fault by the hybrid manufacturer. Leon tested it, then had it verified independantly, both results showed it was fine. Seems too much of a convenient coincedence that the failing actuators seem to appearing on hybrid cars. The last set of turbos that went back were mine !! I was only told half of the story and that was "The turbo builder won’t warrantee the turbo because the actuator failed and will not repair/replace it" Wasn't told the actuators were then tested afterwards & were fine!!!!!!!!!!! So it appears the actuators did not cause this failure and the turbo builders just using this as an excuse. Meanwhile a new hybrid has been bought off him to get my car on the road & I’m supposed to foot the bill. All I can say is George you can stick your turbos where the sun doesn’t shine m8. Ill be ripping these hybrids out & putting a single on as soon as funds allow. Sorry to post such a negative 1st post but I needed to know what the situation was with these turbos. Don’t get me wrong, I think hybrids are a great idea & i'm sure theirs plenty of well built good ones out there but this George the professional turbo builder is obviously having some issues with regards to how his building them at the moment. I’m not going to be a happy bunny when I go to collect my car this weekend to say the least, have a lot of issues I need to address with my mechanic. Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 1, 2004 Share Posted July 1, 2004 Steve, can't be sure they are yours when was it? Link to comment Share on other sites More sharing options...
STEVE C Posted July 1, 2004 Author Share Posted July 1, 2004 Terry Mine are the most recent set of failed turbos that have gone back. Could have been anytime in the last six weeks. Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 1, 2004 Share Posted July 1, 2004 May be yours mate, it was early this week. Link to comment Share on other sites More sharing options...
Guest Terry S Posted July 1, 2004 Share Posted July 1, 2004 what are the symptoms? Did you have #1 boosting higher what was the mileage? Link to comment Share on other sites More sharing options...
STEVE C Posted July 1, 2004 Author Share Posted July 1, 2004 Blue smoke on idle, no1used to spin fine even up to the day I took it back. Never herd any noises from it. I thought it would just be a seal that was slightly cracked or something. I had problems with no 2 not coming on song & thought this would be the problem turbo but I’m told no 2 is fine and the problem lies with no 1 turbo (actuator related). I had less than 1600 miles on the turbos & no1 boost was set at 0.8 bar. Link to comment Share on other sites More sharing options...
Marco Posted July 1, 2004 Share Posted July 1, 2004 I have just brought my supra to JPS. Leon and James are going to check her out next week. They will definatly pay attention to the actuators before that turbo builder can. No lame excuses this time... And they confirmed it was indeed the first turbo that died, it has the death whine alright ..... wwww000000wwww0000000000hhh I'll keep you all informed. Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now