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click-clack noise when reving up - 1986 930
hi,
bought recently a 1986 930 US. The car has been sitting outside for more than a year, also not started for long time. now, trying to bring it back on the read and came across a strange click-clack noise when reving up the engine. most of the times when engine is turned off this "clack" noise shows up too. pls look into video and share your thoughts... it has "limited" quality but gives a clue about what i am asking about i guess... Albin930 - YouTube any ideas? thanks! Krzysztof
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VW 1200 Sparkafer 1973 VW T2b Westfalia 1979 Porsche 930 Turbo Carrera US, 1976 ================ 911S 1976, 930 1986 - both gone Last edited by albinski; 11-09-2013 at 12:03 PM.. |
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11-09-2013, 10:40 AM
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First thing that comes to mind is the silicone washer bumper is shot. At the bottom of the pipe next to the pipe that feeds the intercooler
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87 911 coupe, GP white, cashmere/black 64 Alfa Romeo Giulia TI - the violin 89 Peugeot 505 Turbowagon-other Pcar 67 912 coupe, white, sold 04 Audi Allroad 2.7T |
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11-09-2013, 10:50 AM
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thanks for the reply Ganun; can you please look at the pic below and help me point on the item that you think of here? is it shown here?
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VW 1200 Sparkafer 1973 VW T2b Westfalia 1979 Porsche 930 Turbo Carrera US, 1976 ================ 911S 1976, 930 1986 - both gone |
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11-09-2013, 11:14 AM
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That noise is the sound of the diverter valve piston smacking against its housing end caps when you are suddenly closing the throttle - this happens when the washers/bumpers at each end harden and fall apart. The following is a detailed thread on that unit (although one of the posters, James Brown, gives out some wrong information about how the system on the 930 works) -
Changing 930 dump-gaskets, pictures galore Last edited by Ronnie's.930; 11-09-2013 at 07:25 PM.. |
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11-09-2013, 01:29 PM
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Ronnie and I are talking the same thing but I don't see it in the parts diagram posted....
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87 911 coupe, GP white, cashmere/black 64 Alfa Romeo Giulia TI - the violin 89 Peugeot 505 Turbowagon-other Pcar 67 912 coupe, white, sold 04 Audi Allroad 2.7T |
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11-09-2013, 03:00 PM
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that is great help gents! many thanks!
last thing, though - any clue of the partnumbers of the gaskets/washers that need replacement here? *edit: looked into PET and believe found the correct pn#: 930 110 149 00 will post up the diagram in a bit thanks again, regards, Krzysztof
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VW 1200 Sparkafer 1973 VW T2b Westfalia 1979 Porsche 930 Turbo Carrera US, 1976 ================ 911S 1976, 930 1986 - both gone Last edited by albinski; 11-10-2013 at 02:01 AM.. |
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11-10-2013, 01:51 AM
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and now the diagram - item labeled with no. 7
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VW 1200 Sparkafer 1973 VW T2b Westfalia 1979 Porsche 930 Turbo Carrera US, 1976 ================ 911S 1976, 930 1986 - both gone |
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11-10-2013, 02:02 AM
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Yep, you need two number sevens.
Apologies if you have already thought of this, but since you will need to remove the intercooler and the diverter valve housing, you need to make sure you have a supply of both sizes of intercooler o-rings and the larger o-ring that goes on the neck of the throttle body. I always order more than I need in case I manage to tear one of the new ones when installing (very easy to do). small intercooler o'rings = 99970147340 large " " = 99970146940 o'ring between diverter valve housing and throttle body = 99970147740 Last edited by Ronnie's.930; 11-10-2013 at 08:15 AM.. |
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11-10-2013, 08:12 AM
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perfect!
was not that quick if it comes to searching for o'rings so part numbers came in right on time :-) will report back when new washers are in and all put back together many thanks once again. rgds, Krzysztof
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VW 1200 Sparkafer 1973 VW T2b Westfalia 1979 Porsche 930 Turbo Carrera US, 1976 ================ 911S 1976, 930 1986 - both gone |
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11-10-2013, 08:53 AM
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gaskets arrived and installed. issue solved :-)
one again, many thanks Ganun and Ronnie! regards, Krzysztof
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VW 1200 Sparkafer 1973 VW T2b Westfalia 1979 Porsche 930 Turbo Carrera US, 1976 ================ 911S 1976, 930 1986 - both gone |
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11-28-2013, 06:56 AM
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I love a happy ending!
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1976 911S MidYear Fever is alive and well. |
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11-28-2013, 08:22 AM
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Alfa Romeo
Peugeot
Porsche 911
Audi Allroad
Porsche
1976 Porsche 911S
