SwedeSpeed - Volvo Performance Forum banner
1 - 11 of 11 Posts

·
Registered
Joined
·
3,860 Posts
Discussion Starter · #1 ·
Can anyone who has suffered a raw boost tcv hose failure describe what it feels like? <p>TIA
 

·
Registered
Joined
·
5,201 Posts
Re: What would a ruptured raw boost tcv hose feel like? (JoeLvo)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>JoeLvo</b> »</i></TD></TR><TR><TD CLASS="quote">Can anyone who has suffered a raw boost tcv hose failure describe what it feels like? <p>TIA</TD></TR></TABLE><p>If by "raw boost" you mean the hose from the compressor housing, it will simply be a massive boost leak in the system. If you mean the wastgate vacuum hose, you're in for a ride of your life and a possibility of a new headgasket! <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/rolleyes.gif" BORDER="0">
 

·
Registered
Joined
·
4,248 Posts
Re: What would a ruptured raw boost tcv hose feel like? (George @ ViVA)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>George @ ViVA</b> »</i></TD></TR><TR><TD CLASS="quote"><p>If by "raw boost" you mean the hose from the compressor housing, it will simply be a massive boost leak in the system. If you mean the wastgate vacuum hose, you're in for a ride of your life and a possibility of a new headgasket! <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/rolleyes.gif" BORDER="0"> </TD></TR></TABLE><br> Why head gasket..? i dont under stand why you would replace the head gasket for a vac leak..... If you have a vac leak youll throw codes and it will be hard as hellll to drive!! bucking and heasting
 

·
Registered
Joined
·
7,962 Posts
Re: What would a ruptured raw boost tcv hose feel like? (VolvokidS60R)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>VolvokidS60R</b> »</i></TD></TR><TR><TD CLASS="quote"><br> Why head gasket..? i dont under stand why you would replace the head gasket for a vac leak..... If you have a vac leak youll throw codes and it will be hard as hellll to drive!! bucking and heasting</TD></TR></TABLE><p>Well, if that hose goes...your gonnna get some craaaaazy boost.
 

·
Registered
Joined
·
4,248 Posts
Re: What would a ruptured raw boost tcv hose feel like? (chinaonnitrous1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>chinaonnitrous1</b> »</i></TD></TR><TR><TD CLASS="quote"><p>Well, if that hose goes...your gonnna get some craaaaazy boost.</TD></TR></TABLE><br>Or no zero 0 boost but im still woundering why he say head gasket
 

·
Registered
Joined
·
5,201 Posts
Re: What would a ruptured raw boost tcv hose feel like? (VolvokidS60R)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>VolvokidS60R</b> »</i></TD></TR><TR><TD CLASS="quote"><br> Why head gasket..? i dont under stand why you would replace the head gasket for a vac leak..... If you have a vac leak youll throw codes and it will be hard as hellll to drive!! bucking and heasting</TD></TR></TABLE><p>I think you misunderstood...<br>You may need to replace a headgasket as a result of what a disconnected wastegate vacuum line will do to your engine. You won't get zero boost if the wastegate vacuum line is disconnected; rather boost will continue to build up beyond safe levels (25+ psi) and your engine may get damaged.
 

·
Registered
Joined
·
3,860 Posts
Discussion Starter · #7 ·
Re: What would a ruptured raw boost tcv hose feel like? (George @ ViVA)

Ok, talking about the raw turbo feed to the tcv here, yes the red line. If it had a small rupture, could you see the following:<p>If boost builds gradually, the rupture will hold, but if the boost is built quickly, the rupture cannot hold. Would that scenario cause a stuttering? Like, I'm thinking about a slice in the hose, for example. If you ask for minimal boost, there isn't enough pressure in the hose to push the slice open, but if you hammer on the gas, the slice opens immediately. I've been thinking that the stutter I have might be caused by a compromised compressor line to the tcv, and when it leaks, the wastegate opens because the tcv senses less boost, or vice versa, but the wastegate opening then triggers less pressure in the red line so the slice closes back up, thereby allowing boost to the tcv again through the compressor line.<p>I just confused myself.
 

·
Registered
Joined
·
3,860 Posts
Discussion Starter · #8 ·
Re: What would a ruptured raw boost tcv hose feel like? (JoeLvo)

And a shameless bump, because my effort to get the thread back on topic resulted in massive thread-fail.
 

·
Registered
Joined
·
4,248 Posts
Re: What would a ruptured raw boost tcv hose feel like? (George @ ViVA)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>George @ ViVA</b> »</i></TD></TR><TR><TD CLASS="quote"><p>I think you misunderstood...<br>You may need to replace a headgasket as a result of what a disconnected wastegate vacuum line will do to your engine. You won't get zero boost if the wastegate vacuum line is disconnected; rather boost will continue to build up beyond safe levels (25+ psi) and your engine may get damaged.</TD></TR></TABLE><br>Ok now it make sence kinda. BUT if you have a VAC leak any wear in the turbo system youll have a leak witch mean there no posable way for the car to bild boost. see what im sayin.. wether its at the wastgate or at the charg air pipe<br>and from my exprence yes you will got allmost zero boost w/o a vac line conected. Iv been doing this for a long time and NEVER have i ever see or heard that a vac leak will ever reslt in a headgasket. did the same guy tell you this that told you to olny tq your wheels to 75ft-lb-tq
 

·
Registered
Joined
·
5,201 Posts
Re: What would a ruptured raw boost tcv hose feel like? (VolvokidS60R)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>VolvokidS60R</b> »</i></TD></TR><TR><TD CLASS="quote"><br>Ok now it make sence kinda. BUT if you have a VAC leak any wear in the turbo system youll have a leak witch mean there no posable way for the car to bild boost. see what im sayin.. wether its at the wastgate or at the charg air pipe<br>and from my exprence yes you will got allmost zero boost w/o a vac line conected. Iv been doing this for a long time and NEVER have i ever see or heard that a vac leak will ever reslt in a headgasket. <b>did the same guy tell you this that told you to olny tq your wheels to 75ft-lb-tq</b></TD></TR></TABLE><p>Nope it was the same guy who told you to not run extended bolts with 5mm wheel spacers! <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/wink.gif" BORDER="0"> I apologize for the confusion if I mixed up lb/ft and Nm.<p>If you still don't believe that disconnecting the wastegate vacuum line will result in excessively high boost which may be damaging to your engine, I challenge you to try it out and drive at WOT like that for a while! <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/sly.gif" BORDER="0">
 

·
Registered
Joined
·
5,201 Posts
Re: What would a ruptured raw boost tcv hose feel like? (JoeLvo)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>JoeLvo</b> »</i></TD></TR><TR><TD CLASS="quote">Ok, talking about the raw turbo feed to the tcv here, yes the red line. If it had a small rupture, could you see the following:<p>If boost builds gradually, the rupture will hold, but if the boost is built quickly, the rupture cannot hold. Would that scenario cause a stuttering? Like, I'm thinking about a slice in the hose, for example. If you ask for minimal boost, there isn't enough pressure in the hose to push the slice open, but if you hammer on the gas, the slice opens immediately. I've been thinking that the stutter I have might be caused by a compromised compressor line to the tcv, and when it leaks, the wastegate opens because the tcv senses less boost, or vice versa, but the wastegate opening then triggers less pressure in the red line so the slice closes back up, thereby allowing boost to the tcv again through the compressor line.<p>I just confused myself. </TD></TR></TABLE><p>Whether the boost builds quickly or gradually to, say 15psi, the hose will still leak if 15psi is enough to push the slice open in the hose.<p>If the boost leak is severe enough which will lead to a overly rich mixture, you may have stuttering problems.<p>Note that the red line will only see the pressure sent from the compressor line, not from the TCV.
 
1 - 11 of 11 Posts
Top