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What freekin Oil Leak?
Join Date: Oct 2002
Location: Oahu
Posts: 177
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'79 930 Air Valve Connection
Can anyone confirm that the nipple on the Air Valve for a 1979 930 has no hose connection?
Mine is not connected to anything, which doesn't sound right, but the parts diagram (see blue arrow pointing to #52 in the picture) seems to confirm this is how it should be. Thanks in advance. 
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Steve '79 930 US |
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10-02-2004, 08:53 AM
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Crotchety Old Bastard
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That's the decel valve.
Yes, there is a hose that connects to the middle nipple. If memory serves it runs to the throttle body. This valve is not manditory. It allows the engine to decellerate slowly when the throttle is abruptly cut.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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10-02-2004, 10:15 AM
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What freekin Oil Leak?
Join Date: Oct 2002
Location: Oahu
Posts: 177
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Thanks for the reply. I believe the decel valve is #28 in the image. Both look similar. I notice that some later versions of the air valve do not have the middle nipple.
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Steve '79 930 US |
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10-02-2004, 10:39 AM
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What freekin Oil Leak?
Join Date: Oct 2002
Location: Oahu
Posts: 177
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Anyone out there with a '79 930 US model mind checking your air valve for a hose on the nipple? The air valve is located to the right of the fuel distributor. Help is greatly appreciated.
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Steve '79 930 US |
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10-02-2004, 02:52 PM
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Crotchety Old Bastard
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Woops. You're right. The picture in your original post is not clear or complete on my monitor. The second picture is much better.
I do not know which air control valve that one is. I removed all of this stuff from my '78 engine long ago. The '78 and '79 were pretty much identical from all I can tell through the litterature. If no one has a quick answer for you I'll pull out my notes and schematics. My engine is (was) a California model and had every once of crap they could pile on it.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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10-02-2004, 03:34 PM
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What freekin Oil Leak?
Join Date: Oct 2002
Location: Oahu
Posts: 177
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Thanks, Rarly8, but it looks like the California model is different.
In my schematics, the California model has a thermo valve (#6 in lower diagram) that connects to the nipple. The USA/Japan model show no nipple hose. I'm wondering if I have the correct Air Valve installed on my car - it looks as if it shouldn't have a nipple (#5 in upper diagram). That's easy enough to check. Edit: I verified that the USA/Japan and California Air Valve part numbers are the same. Therefore, I can only conclude the nipple has no hose. I'm moving on. 
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Steve '79 930 US Last edited by TurboBert; 10-02-2004 at 04:38 PM.. |
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10-02-2004, 04:33 PM
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Crotchety Old Bastard
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I'm with you now. The California model has an added Thermol Valve controlling the length of operation of the AAV#5.
Yes, I do believe you can move on. Does HI require all this stuff on your car?
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 |
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10-02-2004, 06:59 PM
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What freekin Oil Leak?
Join Date: Oct 2002
Location: Oahu
Posts: 177
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No, despite being the welfare state, the smog nazis have yet to establish a foothold.
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Steve '79 930 US |
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10-02-2004, 11:03 PM
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Registered
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Is the part in the center of the pic the one you're asking about?
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2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) |
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10-03-2004, 04:13 AM
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Registered
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Oops, here's the pic:
 My engine's out, but this picture was taken moments after is was pulled so unless the missing vacuum hose runs to somewhere besides the engine, there was none. If I remember correctly, the only small diameter hose from the chassis to the engine was the one for the charcoal canister.
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2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) |
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10-03-2004, 04:20 AM
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What freekin Oil Leak?
Join Date: Oct 2002
Location: Oahu
Posts: 177
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David,
Thanks, you nailed it. No hose. 
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Steve '79 930 US Last edited by TurboBert; 10-03-2004 at 10:02 AM.. |
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10-03-2004, 09:55 AM
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78 Porsche 911SC 3.0L, 3.3Turbo soon. 
1979 Porsche 930 3.4
