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One thing to think about if you're going to the extent of tooling is perhaps a multi-cavity tool. We use a lot of plasctic pieces in the telecom world and when the parts are small the specialised tool save many $$$.
Not sure how similar rubber injection tools are to plastic.
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Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Redesign the HVAC head to take the control signals for the solenoids to the servos which are then mounted to replace the actuators. The design would have to use servos strong enough to open and close the respective flaps. This way the auto system can remain unless one wanted to get real adventures.
To remove and replace the defrost diaphram took me about two hours. The center comb I think is the worst, I must have spent three hours inside the car with a flash light and mirror trying to reattach the conncecting rod to the arm and dropping alot of F bombs along the way, Not something I want to do again in the near future. I did'nt cut a hole which you see in the begining of the post which would have made things much simplier, but rathter used the vent on the passenger side.
Is this the one where the suggested fix is to drill a 1/2" hole (hole saw) and then put a plastic cap (sourced from Lowes)? I did it that way, and hooking the arm up was a breeze.
If (and its maybe a big if but I'm pursuing it) we can replace the vacuum acuators with electric servos there's a possibility of changing the default positions. If this works what would be your preference.............my first thought is the hot water valve; default closed?
Of the above, what would likely be causing a "ticking" noise from dead center of the console/behind the vent?
My initial / uninformed guess would be the Comb Flap Actuator or diaphragm?
Any thoughts much appreciated.
Of the above, what would likely be causing a "ticking" noise from dead center of the console/behind the vent?
My initial / uninformed guess would be the Comb Flap Actuator or diaphragm?
Any thoughts much appreciated.
hi
mine was making a regular ticking noise from behind the dash a few seconds after the engine started, and it was a small split in the diaphragm.
when the diaphragm was at rest the split was closed and held a small amount of vacuum, and when the vacuum pulled the diaphragm it opened the split and it would loose its vacuum quickly and make the flap fall back to rest and make the tick noise, then the cycle would just keep repeating itself.
very annoying noise.
cheers
Phil
Last edited by h2pmr; Jul 12, 2024 at 03:09 AM.
Reason: spelling
Replacing the comb flap becomes much easier using a cheap inspection camera linked wirelessly to your phone. You can do it in comfort sitting in the car! Still need to pull centre console but that’s not too bad.
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George Layton March 2014
