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Discussion Starter · #1 ·
Hey Gang... My mother has a 2004 S40 LSE with 46K on the clock. She bought the car new and has always had the service as outlined in her maintenance booklet performed at our local volvo dealer. She uses Chevron fuel, middle grade. And once every two months my dad pours in a bottle of Chevron techron fuel additive. (I dont know which formula) She commutes about 25 miles round trip a day. I'd say it's all highway driving. <p>The problem is this: There is a loud rattle of metallic nature coming from under the hood. It's always reproduced in the morning when the car has sat overnight. It starts around 3-4K RPM and gets louder as the RPMs increase. There are no performace issues. I believe its more than likely (I hope) coming from a heat shield or a exhaust component. Maybe the turbo impeller blades contacting the turbo housing. <p>The dealers stance on the issue: The car has been to the dealer 3 times this month for this issue. And is at the dealer at the present moment. (Dropped it off Wed 5/24) Twice before this visit, the dealer claims they were unable to replicate the noise. This morning I drove to the dealer and demonstrated the noise the car makes after the car had been sitting at the dealer overnight. The service advisor that drove along with me plainly stated, that is a pinging noise caused by carbon deposits from poor quality fuel. He did not want to have a tech examine the car further and said there was nothing he could do about the noise. I poked a little and said what if it is not carbon and a failing turbocharger or cat. converter? He said the part in question would have to completely fail before they could even diagnose the car further. <p>I have called Volvo cust service care and have started a technical something or other. The car remains at the dealer, and I have their S60 as a service loaner. I myself do NOT want to pick my car up from the dealer and return their loaner until the S40 has been further examined for this noise, whatever it may be. <p>What would you do?? <br>Thanks for your input!! <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/wink.gif" BORDER="0">
 

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Discussion Starter · #2 ·
Oh yes, forgot to mention that the service advisor at the dealer explained that the noise I was hearing was pinging. Wouldnt the Check Engine light come on if it detected pinging?!
 

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Re: metallic rattle at high RPMs

The pinging explanation doesn't make a lot of sense to me. The ECU software adjusts timing to prevent pinging in response to changes in octane levels. Engines can ping when they run too lean or too hot.... but we could speculate forever about what's causing this. <p>You might ask for some possible technical explanations at this forum:<p><A HREF="http://www.s40concepts.net:16080/newforum" TARGET="_blank">http://www.s40concepts.net:16080/newforum</A>/<p>Your warranty is up at 50,000 miles- so you really want this fixed soon.
 

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Re: metallic rattle at high RPMs (volvair)

Can you tell where the tapping is coming from? Upper part of the engine? Does it do it louder when its cold or at idle then go away at higher RPMs or when its heated up?<p>We had the same problem with the wifes 2003 S-40 sedan. Turns out there are some rubber o-ring gaskets in the oil pump that crap out, due to heat, vibration and all and when they give way, they allow air to get pumped by the pump. This creates valve clatter/tapping when its cold or at idle, then goes away after warmed up of off idle. It WILL get worse...so get it fixed when you can.<p>Volvo has replacement o-rings that are green and made of a tougher material that won't crap out. They have to drop the oil pan to do the replacement kit...3-4 hour job. Covered if you still have drivetrain warranty.<p>Don't let the dealership tell you "thats unusual" my indy Volvo specialist said he has seen several FWD Volvos with this problem. Volvo has a re-build/upgrade kit for the oil pump seals that hasbeen out since the 850, so THEY know about it.<p>Not a huge problem, but not uncommon, so don't let them BS you on that.<p>- Brickboy240
 

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Discussion Starter · #5 ·
Re: metallic rattle at high RPMs (brickboy240)

It's not the valves, completely quiet there. I know the difference. Its more of a very fast frequency metallic clatter. Sounds like the turbine is rubbing against the housing in my opinion. I havent had the chance to look that far into it yet. And it's only within the first minute of driving when the engine is completely cold. After the car has been driven a few blocks, it goes away. And it's only within the RPM range of 3000-4000. Any higher or lower, it's purring.<p>The car goes in AGAIN on tues 7-11-06 for the SRS light. This is the second trip this year for the SRS system. <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0"> <p>Im dying to give Volvo customer care a good piece of my mind. Im getting really fed up with my dealer.<br>
 

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Re: Need advice on metallic rattle / noise on S40 LSE (TurboMoose)

Hello,<p>I have the same problem as you describe on my older Volvo S40 2000 2.0T (a swedish version, probably not the same name in USA). It ratles a lot when the car has been standing overnight and is cold. When it gets warmer it usually goes away until a couple of days ago when the same damn noise started while I was driving on the highway after a short stop. <p>It comes from the upper part of the engine, it almost sounds as if its from the AC but it's not. The car has its regular service in a couple of weeks, I'll see what they say, will mention the stuff about the oil pump.
 
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