my 08 has been doing it for as long as i can remember. close to 80k miles on the odo.
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| Author: | jet9000 [ Wed Aug 29, 2012 11:37 pm ] |
| Post subject: | Noisy Cats |
My 2011 jet (50 state emissions) has what seems to be a tic coming from my driver side catalytic converter. I took it to 2 dealers they say its normal. They will not replace it if its not throwing a code. I have listened to over 10 libertys so far and yet to here this "normal" sound. Any one else here have this problem? I can really hear it when I pull into the garage. I also listened to everything with a stethoscope and it really seems to be the cat. |
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| Author: | DirtyKK [ Thu Aug 30, 2012 12:42 am ] |
| Post subject: | Re: Noisy Cats |
my 08 has been doing it for as long as i can remember. close to 80k miles on the odo.
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| Author: | tjkj2002 [ Thu Aug 30, 2012 12:47 am ] |
| Post subject: | Re: Noisy Cats |
So when does the noise happen? Engine running or shut off? |
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| Author: | jet9000 [ Thu Aug 30, 2012 10:00 am ] |
| Post subject: | Re: Noisy Cats |
Engine running. No noise on startup. I get it as the engine heats up. Speaking of engine heat, I think this 3.7 heats up faster then any engine I've owned which started with a 318ci in a 1976 aspen and my last 2 where 3.5s in a Magnum and 300. I'm going to time it. It doesn't over heat according to the dash gage. |
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| Author: | 2morrow [ Fri Aug 31, 2012 9:24 am ] |
| Post subject: | Re: Noisy Cats |
When I purchased my 2012 - we wanted another unit with the skyslider - it had an exhaust leak and overall did not sound "right"... Dealer was waiting for it to "throw a code" as well. Sad that they do not reply on basic troubleshooting skills and the word of tech... |
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| Author: | Gageraid [ Fri Aug 31, 2012 9:06 pm ] |
| Post subject: | Re: Noisy Cats |
I think we all know this noise that have a KK. I just switched to Mobil 1 synthetic engine oil today and it greatly reduced the noise. I do remember reading that it's just the nature of the beast and possibly noisy lifters. |
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| Author: | jet9000 [ Sat Sep 01, 2012 12:36 am ] |
| Post subject: | Re: Noisy Cats |
I have a 5w30 semi synthetic put in from the dealer I got it from. I know 5/20 is recommended. Some run the 5/20 some run the 5/30. I don't think its lifters If I use my stethoscope I can really hear it on the cats nothing on the block or heads except normal valve train sounds. Its very pronounced going through a toll booth (reflections) . When the engine is under load it sounds like an exhaust leak. I'm thinking maybe the flanges at the exhaust manifold/pipe connection. I made sure every thing was tight but it could be that soft metal gasket at the joint is bad. I am about to take matters into my own hands. I hope it is not an exhaust manifold gasket. That looks like pain to remove. |
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| Author: | jet9000 [ Sat Sep 01, 2012 12:45 am ] |
| Post subject: | Re: Noisy Cats |
2morrow wrote: When I purchased my 2012 - we wanted another unit with the skyslider - it had an exhaust leak and overall did not sound "right"... Dealer was waiting for it to "throw a code" as well. Sad that they do not reply on basic troubleshooting skills and the word of tech... I hear ya. My father is 75 years old he started building engines for race boats when he was 16. He can read a vacuum gauge better than some of today's "techs" read a scan tool. I would love for him to hear it but all those years of racing have not been kind to his ears. |
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| Author: | DirtyKK [ Sat Sep 01, 2012 1:17 am ] |
| Post subject: | Re: Noisy Cats |
jet9000 wrote: I have a 5w30 semi synthetic put in from the dealer I got it from. I know 5/20 is recommended. Some run the 5/20 some run the 5/30. I don't think its lifters If I use my stethoscope I can really hear it on the cats nothing on the block or heads except normal valve train sounds. Its very pronounced going through a toll booth (reflections) . When the engine is under load it sounds like an exhaust leak. I'm thinking maybe the flanges at the exhaust manifold/pipe connection. I made sure every thing was tight but it could be that soft metal gasket at the joint is bad. I am about to take matters into my own hands. I hope it is not an exhaust manifold gasket. That looks like pain to remove. Keep us updated if you do. I've lived with it forever but really irritates me. |
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