vac leak sound comming from turbo xs mbc.
08-29-2004, 04:57 PM
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vac leak sound comming from turbo xs mbc.
Today I noticed a sound of a vacume leak sound comming from my engine. So I looked futher into it, the vacume leak is comming from or around the rubber o-rings on my turbo xs mbc. Is this normal at idel? I have noticed it takes a while to build boost, would this have anything to do with this? Thanks!
08-29-2004, 05:00 PM
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Re: vac leak sound comming from turbo xs mbc. (boost fed ls)
I have the same boost controller and no it should not leak boost at idle. Go ahead and try to replace the o-rings. That would explain why your cars builds boost slowly.
08-29-2004, 07:26 PM
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Re: vac leak sound comming from turbo xs mbc. (boost fed ls)
There are two seals on both vac lines on the boost controller. Those will leak if damaged. The rings that I think you might be thinking of the the actual housing don't have any function. Are you sure the sound isn't coming from the hex adjustment on the top?
08-30-2004, 09:08 AM
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Re: vac leak sound comming from turbo xs mbc. (maxspeedhonda)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maxspeedhonda »</TD></TR><TR><TD CLASS="quote">There are two seals on both vac lines on the boost controller. Those will leak if damaged. The rings that I think you might be thinking of the the actual housing don't have any function. Are you sure the sound isn't coming from the hex adjustment on the top?</TD></TR></TABLE>
I am pretty sure its comming from around the 0-rings, if its comming from the hex screw can it be fixed?
I am pretty sure its comming from around the 0-rings, if its comming from the hex screw can it be fixed?
08-30-2004, 09:42 AM
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Re: vac leak sound comming from turbo xs mbc. (boost fed ls)
The two large black o-rings are more or less to grip by. If you take them off, there is nothing underneath them. The only way I can see the hex leaking is either the threads are stripped or it is loosened all the way. Have you checked the tightness of it?
08-31-2004, 01:51 PM
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Re: vac leak sound comming from turbo xs mbc. (maxspeedhonda)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maxspeedhonda »</TD></TR><TR><TD CLASS="quote">The two large black o-rings are more or less to grip by. If you take them off, there is nothing underneath them. The only way I can see the hex leaking is either the threads are stripped or it is loosened all the way. Have you checked the tightness of it?</TD></TR></TABLE>
no, its still boosting the same amount so I did not check it. I will check it out, thanks!!
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08-31-2004, 02:02 PM
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Re: vac leak sound comming from turbo xs mbc. (boost fed ls)
i have seen that before too on my friends car. he had a turbo xs dual stage mbc and it made the same vaccum noise when he had the high boost on when he flipped the switch to low boost it went away. i think it might be due to running higher boost. his car ran good no delay in spool time. might be normal. 
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