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Post by miniman35 on Jul 3, 2017 21:00:50 GMT
Hi all, I am a new user to the forum and hoping someone may be able to answer my question.
Is there any way to tell if the torque converter is on it's way out? without taking anything a part? There's a noise coming from it on idle and only idle. My guess there's a bearing on it's way out but the noise doesn't match the sound of a bearing. To me the sound sounds like electric arching but I'm sure this isn't the case as there isn't any electric parts in it. Has any one heard or come across this before? Also is there any good manuals on the automatic engines? I do have a Haynes manual but was there one ever make for just automatic's?
Thanks Simon
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Post by wimfournier on Jul 4, 2017 10:42:14 GMT
Simon, I can reassure you I think by telling you that the torque convertor doesn't make noises when the engine is turning over at low rpm. When there is coming any noise from the neighbourhood of the black cover of the engine, it must be something on the outside of the flywheel coming in contact with the cover or something of the starter motor. It could be you have a bit of 'play' in the length of the cranck. If so, you could find out at the other end of the crank. There you find the pulley on the crank. If the crank would have longitudional play you could feel that, see that, by trying to push the pulley forwards and backwards against the body of the engine block. Use a screw driver between the pulley and the block to push the pulley forwards and a block of wood or something to push it back towards the engine block again. When you see and feel movement doing so, than thats where the noise comes from. Your crank moving longitudionaly.
This answer is open for comments of other readers. Help Simon out!
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Post by jockduck on Jul 4, 2017 11:26:43 GMT
Excessive Crankshaft end float on an auto is very rare as there is no thrust on the crank from the clutch as in a manual 'box. A worn bearing in the T/C should make more noise as the engine speed rises. I assume the noise is when the engine is hot, I have found that autos tend to make weird noises whin idleing hot, I always put it down to lack of full oil pressure in the hydraulics. Depends how bad the noise is and how uncomfortable you are with it. Jock
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Post by notamini on Jul 4, 2017 12:25:14 GMT
I think I'd start with the idea that there is some foreign matter in between the housing and the flywheel or the Bendix drive on the starter not disengaging. I'm thinking this because you describe the sound as electric arcing. Mind you, a bearing on its way out can make a similar noise. Make sure the sound is coming from the converter and not from some ancillary component like the starter.
There are plenty of service manuals out there specifically for the auto transmission. Look for the download link in the "HOW TO" section of this site.
Mark
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Post by wimfournier on Jul 4, 2017 16:40:11 GMT
As Jockduck argued, excessive cranksgaft end float, you can forget. Next I think of the idler gear that is between the torque converter and the in-going axle into the gearbox. This gear wheel has its teeth in an angle, so, at low rpm and irregular running it may clutter when it has a bit too much play sideways.
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Post by miniman35 on Jul 4, 2017 18:28:14 GMT
Hi all and thanks for the replies. I was able to confirm the noise is coming from the T/C cover top side. If I hold a pipe and put it against the cover for the T/C and my ear on the other end of the pipe. I can hear the noise. I checked all around that area and the top part of the T/C house is the only place it seems to be coming from. The noise appears to happen if the engine is cold or hot. It's not a continuous sound. It only happens when on a very low idle even after pushing in the choke after 1 minute. I'd also say that you wouldn't even notice it if the bonnet was closed. The reason I've noticed it is because I watching and listening to everything on the engine as it has been sat up so long. Either way I will do what you all suggest over the weekend as I'll be replacing the timing cover seals due to a new leak and repair driver side suspension. I'll take the Mini for a spin and see how she drives. I've not had it out for a good run. Only around the garden. So maybe after a good run there might be new noises pointing to a issue
Thanks Simon
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