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Discussion Starter · #1 ·
Determined so far:<br> - Not the SAP<br> - Not the timing belt tensioner<br> - Once the oil has warmed, this noise goes away<br> - started to hear the noise after switching to 20/50 Mobil 1. (may just be coincidental)<p><br>What is the rubbing sound you hear when the engine is given a little gas and then lets off. If you listen carefully you'll hear a deeper tone whirling sound/rubbing sound.<p><A HREF="http://homepage.mac.com/chris_stewart/iMovieTheater46.html" TARGET="_blank">video clip 1 - hood open</A><br><A HREF="http://homepage.mac.com/chris_stewart/iMovieTheater47.html" TARGET="_blank">video clip 2 - hood closed</A><p>If you don't have <A HREF="http://www.apple.com/quicktime/" TARGET="_blank">Apple's Quicktime</A><p>
 

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Re: Name this sound... ([email protected])

Oh GOD you do NOT run 20-50 in these (stock)
 

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Chris - everybody runs 5w-40 in their Volvos (and most other European cars) over here in Sweden for general driving from what I've seen.<p>I always ran 5w-30 during the winter up in Maine and 10w-30 during the other 3 seasons in NY. Synthetic from about 120K on.<p>That doesn't sound nice <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/confused.gif" BORDER="0">
 

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Discussion Starter · #5 ·
Re: Name this sound... (1999_V70)

it was used in an attempt to quiet lifters, which it did. ugh. <p>What does 20/50 do that is so detrimental to these delicate motors?<p>
 

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Re: Name this sound... ([email protected])

WAY too thick, will rob HP at best<br>At worst, could sludge up
 

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Discussion Starter · #7 ·
Re: Name this sound... (JRL)

about 2500 miles on the 20/50 Mobile 1 - I'll change it out this week.<p>ideas on what might be the "unhappy" part if the oil is too thick on start-up?<p>thanks guys.<p>
 

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didnt even listen to it yet but I will guess valve tap first and then bottom end knock second ...
 

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sweeet jesus man 5w30 lol <p>and just listen to it and thats some crazy valve tap <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/eek.gif" BORDER="0">
 

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Re: (Chilled Man)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>Chilled Man</b> »</i></TD></TR><TR><TD CLASS="quote">didnt even listen to it yet but I will guess valve tap first and then bottom end knock second ... </TD></TR></TABLE><br>Neither
 

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Re: Name this sound... (JRL)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>JRL</b> »</i></TD></TR><TR><TD CLASS="quote">Oh GOD you do NOT run 20-50 in these (stock)</TD></TR></TABLE><br>Nothing wrong with it. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/rolleyes.gif" BORDER="0">
 

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Re: (JRL)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>JRL</b> »</i></TD></TR><TR><TD CLASS="quote"><br>Neither</TD></TR></TABLE><p> <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/rolleyes.gif" BORDER="0"> thats valve tap <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/wink.gif" BORDER="0">
 

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Re: Name this sound... (gdogg16)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>gdogg16</b> »</i></TD></TR><TR><TD CLASS="quote">It doesn't sound like rod knock, possibly a collapsed lifter. If anything, the heavier weight would have helped the lifter..</TD></TR></TABLE><p>Even that thick of oil ? Figured with that thickness woudl worry about sludging and or blocking up someplace in the engine espcially when the engine is cold and not fully warmed up . <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/confused.gif" BORDER="0">
 

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Re: Name this sound... ([email protected])

Okay, I'll play. <p>To be honest, I don't think the valve clatter is all that bad on a 10+ year old car with high miles. I think many of our cars would make the same clatter if revved with the hood open like that. <p>The whirring sound that I think you were asking about and what I heard almost sounds like a bad pulley, or one of items driven by the motor, like the ac comp, alternator, or ps pump. Wonder if you can at least isolate the sound to the front of the motor and then work from there, also change the oil to 5w30 or 10w30 to see if by chance that is it.
 

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Re: Name this sound... (Wayne T5)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>Wayne T5</b> »</i></TD></TR><TR><TD CLASS="quote"><p>The whirring sound that I think you were asking about and what I heard almost sounds like a bad pulley, or one of items driven by the motor, like the ac comp, alternator, or ps pump. </TD></TR></TABLE><br>I said this before, Chris doesn't want to go there for some reason
 

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Discussion Starter · #18 ·
Re: Name this sound... (JRL)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>JRL</b> »</i></TD></TR><TR><TD CLASS="quote"><br>I said this before, Chris doesn't want to go there for some reason</TD></TR></TABLE><p>I don't recall the suggestion before - but I think the alternator might be original and I'm open to any and all suggestions. I need to keep this puppy running for a few years. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0"><p>The audio on the clip enhances the high frequencies of the lifters making them appear louder than they really are - it doesn't sound "overly" tappy with the hood up. I'll see if I can adjust the sound to focus in more on the whirling that does sound like a bad pulley, belt, etc.<p>Another symptom, after sitting overnight, there is a hesitation either with the starter motor or possibly the alternator not giving enough juice as it takes a extra turning of the key to get it started.<p>We will solve this mystery, hopefully as inexpensively as possible <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0">
 

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hey when are you comming up to get the sunroof and headliner ? <p>I have a scope we can use to hear around <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/biggrin.gif" BORDER="0">
 

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Re: Name this sound... ([email protected])

That last thing you mentioned, the hesitation sounds like the B+ battery cable going bad. Volvo has a TNN about this that has you replace the cable. It sucks to just throw money at something, but if it is happening consistently this is likely the issue. If it only happens when the car is warm then maybe a leaking injector but you said it happens overnight.
 
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