ing-schu@online.no Posted November 19, 2007 Report Share Posted November 19, 2007 [attachmentid=853] I have had this sound sinse last winter, if I should describe it I would compare it with a electrical grass/lawn trimmer, the one with a nylon line cutting the grass, while making a whirring high pitched sound. I have to put it in drive and apply throttle to make it appear, as it occurs while producing torque only. Even evident a split second in neutral with a cold engine, when flipping the throttle. It occurs in the range of 1500 to 2500 rpms. It disappears once the engine is warmed up. It isn't as loud as the soundclip indicates, but it is clearly evident inside the car. Any ideas? Weird_sound.mp3 Quote Link to comment Share on other sites More sharing options...
mts Posted November 19, 2007 Report Share Posted November 19, 2007 Have you done anything recently? Maybe you have a CV going out? That is an odd sound.... Quote Link to comment Share on other sites More sharing options...
enginph Posted November 19, 2007 Report Share Posted November 19, 2007 Where is the mic? And do you drive it while recoridng? Quote Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted November 19, 2007 Author Report Share Posted November 19, 2007 I had someone stand outside the car recording the sound while applying throttle in drive with the brakes on. Sinse it goes away once warm I've made no major effort to find the source. The stethoscope didn't help me, partly because the heat buildup is substantial. The tranny fluid reached at least 60 degrees through the cooler in like 15 seconds while listening. From around Zero C. I think it comes from the top of the engine though. I have been thinking exhaust leak but it disappears once warm... Quote Link to comment Share on other sites More sharing options...
enginph Posted November 19, 2007 Report Share Posted November 19, 2007 Thats a crazy test! Then it is not cv joints.. Quote Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted November 19, 2007 Author Report Share Posted November 19, 2007 Nope. It is not a harmful test, granted it isn't carried out too long. Towing is worse Quote Link to comment Share on other sites More sharing options...
latinopikachu Posted November 20, 2007 Report Share Posted November 20, 2007 i expect pictures Quote Link to comment Share on other sites More sharing options...
MazdaMomma Posted November 20, 2007 Report Share Posted November 20, 2007 fuck pictures, I want a video of the Xedos towing.... Quote Link to comment Share on other sites More sharing options...
enginph Posted November 20, 2007 Report Share Posted November 20, 2007 I want a 3D HD representation of the actual test along with dolby digital sound! Quote Link to comment Share on other sites More sharing options...
MazdaMomma Posted November 20, 2007 Report Share Posted November 20, 2007 Even better would being in the room with BHR and seeing his reaction to said video... Quote Link to comment Share on other sites More sharing options...
mts Posted November 20, 2007 Report Share Posted November 20, 2007 Torque converter Quote Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted November 20, 2007 Author Report Share Posted November 20, 2007 I agree MTS. Though it stumps me that it is evident even in neutral when flipping the throttle, some minute or two after starting. Later while warming up it is evident only while driving. Or doing said test. Either way I know what to do. Keep driving And some of you guys know I am working on a video Quote Link to comment Share on other sites More sharing options...
mts Posted November 20, 2007 Report Share Posted November 20, 2007 All that towing has worn out the TC. Something has changed, and when cool there is contact. Then when expanded with heat it is all good... but that is odd. Quote Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted November 20, 2007 Author Report Share Posted November 20, 2007 Yes, I don't know much about torque converters but it sounds reasonable. Now "all that towing" is a vast exaggeration, part from I don't know what the previous owner was up to. I'm now at 147k km, which means I've just added 100k km to the odometre I might affect my plans to swap the car for a 5-speed though, because the sound will be evident during testdrives. And I do NOT intend to look into anything untill I have a more serious problem. It drives perfect, part from the sound during warmup. Would it be an idea to try some additive like Lubeguard? Thanks for the reply anyway! Quote Link to comment Share on other sites More sharing options...
mts Posted November 20, 2007 Report Share Posted November 20, 2007 I was being sarcastic about the towing ..... but there might be a Lucas product that quiets the sound? Quote Link to comment Share on other sites More sharing options...
colbylamb2006 Posted November 20, 2007 Report Share Posted November 20, 2007 woah that's a weird sound Quote Link to comment Share on other sites More sharing options...
Jdubs99 Posted November 21, 2007 Report Share Posted November 21, 2007 That was the engine in park or neutral? Quote Link to comment Share on other sites More sharing options...
mts Posted November 21, 2007 Report Share Posted November 21, 2007 I thought from the write up, it was in gear with the brakes on... Quote Link to comment Share on other sites More sharing options...
Jdubs99 Posted November 21, 2007 Report Share Posted November 21, 2007 Tranny would make sense then. Quote Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted November 22, 2007 Author Report Share Posted November 22, 2007 Except for one thing I realized today; it is evident even with TCC engaged Quote Link to comment Share on other sites More sharing options...
Jdubs99 Posted November 26, 2007 Report Share Posted November 26, 2007 Still makes sense for transmission. Quote Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted August 9, 2009 Author Report Share Posted August 9, 2009 Update: I'm now pretty sure the weird sound comes from my torque converter. It turns out a friend of mine had a similar sound in his Jaguar XJ12. And he replaced the torque converter which fixed it. What happends is that a turbine blade is either bent or knocked loose, allowing contact between driving and driven part of the converter. Wonder what my magnets look like... I guess I should look into it soon, the sound is evident more often now but still not continiously. I guess the whole tranny must come out to replace the converter? My tranny runs like a dream part from the slightly worrying sound, so I'll just go for converter replacement. Quote Link to comment Share on other sites More sharing options...
Troutman Posted August 10, 2009 Report Share Posted August 10, 2009 Yes it all must come out (at least on a RWD car...) as it's a big bastard in the bellhousing, and you'd want to make sure you check any other questionable parts at the same time, like any bands, clutches, valve body etc if it is on the way out. One can't always judge by how the car is driving... Quote Link to comment Share on other sites More sharing options...
ing-schu@online.no Posted August 10, 2009 Author Report Share Posted August 10, 2009 Thanks, I will look into it. I wouldn't want to put too much money in repair on a slushbox though, rather source a parts car and do a 5-speed conversion. They can be had for around 1000 Euros in Germany, either 2,0 or 2,5 5-speed. We shall see, now that she is not my only decent car I have plenty of time. And basically this sound has been evident for years without other signs of trouble. The reason why I asked if the tranny has to come entirely out is I read somewhere about unbolting parts when sliding the tranny away from the engine. I'll look into the FSM before a tranny job, I imagine it is abit beyond a minor project. Previously I've only had out manual trannies and done clutchswaps. Quote Link to comment Share on other sites More sharing options...
Troutman Posted August 10, 2009 Report Share Posted August 10, 2009 You'd have to consider jumping straight to the 5 speed then. You'd be pretty upset if the torque converter turned out to be not be the culprit... Quote Link to comment Share on other sites More sharing options...
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