GReddy 18G internal wastegate actuator, causing vaccum leak?
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GReddy 18G internal wastegate actuator, causing vaccum leak?
Long story short:
'99 Civic Si 18G GReddy kit... car pulls 20 in. hg. of vaccum at idle when the wastegate actuator is not connected to a vaccum line. Connect the line, vaccum drops to about 2 in. hg. What gives?
The car is overboosting which has led me to track down the problem to the gate. What is inside the actuator assembly? A diaphragm? Can this be adjusted to work again and stop the vaccum leak? Any info is appreciated, thanks!
- Louis
'99 Civic Si 18G GReddy kit... car pulls 20 in. hg. of vaccum at idle when the wastegate actuator is not connected to a vaccum line. Connect the line, vaccum drops to about 2 in. hg. What gives?
The car is overboosting which has led me to track down the problem to the gate. What is inside the actuator assembly? A diaphragm? Can this be adjusted to work again and stop the vaccum leak? Any info is appreciated, thanks!
- Louis
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Joined: Oct 2004
Posts: 332
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From: vallejo, ca, usa
Re: GReddy 18G internal wastegate actuator, causing vaccum leak? (HybridKOOP)
most likely torn diaphram because same thing happened to mine... it started boostin up to like 10-13 psi.. the turbo is off now.. but im thnkin about shutting that hole n modifying the manifold for a external gate.....
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Joined: Jan 2005
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From: So Cal
Re: GReddy 18G internal wastegate actuator, causing vaccum leak? (nfn15037)
How does the diaphragm inside actually get torn? Would having the actuator too close to the manifold cause this?<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nfn15037 »</TD></TR><TR><TD CLASS="quote">Probably a torn diaphram inside the actuator.</TD></TR></TABLE>
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Joined: Jul 2001
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From: Boston, MA, USA
Re: GReddy 18G internal wastegate actuator, causing vaccum leak? (OH ISH ITS DAT FOOL JAMES)
Could be heat damage, improper assembly @ the factpry, a small burr on the inside of the casnister or even some dirt grit getting in there through the vac line and abrading the diaphram over time.
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