87 to 95 Flappy Butterfly valve screws
11-24-2015, 01:03 PM
#16
Rennlist Member
I pulled my flappy , and might be able to look at the parts baggie i made. are talking about flappy parts or throttle body butterfly parts? (or are they, being the screws, the same?)
11-24-2015, 02:14 PM
#17
Rennlist Member
Just took a screw out of the butterfly on my spare THROTTLE BODY.
Overall length - 10mm
Thread length 6mm - 7mm
Head diameter = 6mm
Thread - 4mm 0.7 pitch
Drive - Phillips # 1
Head type - machine.
This screw appears to be made of coated brass (silver coating, brown body).
It has a 1mm cut across the end of the thread shank for splaying to hold in place.
My recollection is that the flappy screws are different but I don't have time to dismantle the spare intake to have a look ATM.
Cheers,
Myles
Overall length - 10mm
Thread length 6mm - 7mm
Head diameter = 6mm
Thread - 4mm 0.7 pitch
Drive - Phillips # 1
Head type - machine.
This screw appears to be made of coated brass (silver coating, brown body).
It has a 1mm cut across the end of the thread shank for splaying to hold in place.
My recollection is that the flappy screws are different but I don't have time to dismantle the spare intake to have a look ATM.
Cheers,
Myles
11-24-2015, 04:37 PM
#18
Rennlist Member
As far as I could see the throttle and flappy screws were the same. Oddly, the ends were treated differently. The flappy had a round divot in the end, while the throttle had a slot that was split wider.
12-15-2015, 03:12 PM
#19
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Overall length - 10mm
Thread length 6mm - 7mm
Head diameter = 6mm
Thread - 4mm 0.7 pitch
Drive - Phillips # 1
Head type - machine.
Thread length 6mm - 7mm
Head diameter = 6mm
Thread - 4mm 0.7 pitch
Drive - Phillips # 1
Head type - machine.
Any thoughts on material?
Possible choices ----
4.8 Steel Zinc Plated
4.8 Steel Black Oxide & oil
18/8 SS
18/8 SS Black Oxide
__________________
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."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
12-15-2015, 09:33 PM
#21
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If you're trying to match the OE part it needs to be brass?
12-16-2015, 07:23 AM
#22
Three Wheelin'
12-16-2015, 03:36 PM
#23
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FWIW, and with that tiny chance that one will find its way all the way down to a combustion chamber, I would stick with the original brass if at all possible. That would dent a piston and flatten after a few impacts, where a steel or SS would break a piston or worse.
My 2 cents.
My 2 cents.
07-16-2017, 06:11 PM
#25
Rennlist Member
I need a pair of these screws - did anybody ever find a suitable replacement?
07-17-2017, 12:14 AM
#26
Archive Gatekeeper
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Was curious about this and took some pics today. Are we sure about brass? They stick to magnets:
M4 x 0.7 x 8 mm:
Hollow tip:
Overall length- 11.25mm
M4 x 0.7 x 8 mm:
Hollow tip:
Overall length- 11.25mm
07-17-2017, 03:59 PM
#28
Rennlist Member
Could you toss 4 in with my delrin bushing order? Don't really care which flavor. :-)
07-17-2017, 04:29 PM
#29
Rainman
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i'd bet you could use a flush-head rivet that would fit there.
...5/32 is almost 4mm, tapered head to fit the countersunk hole...permanent.
http://www.aircraft-tool.com/shop/de...ID=MS20426-5-8
...5/32 is almost 4mm, tapered head to fit the countersunk hole...permanent.
http://www.aircraft-tool.com/shop/de...ID=MS20426-5-8
Last edited by V2Rocket; 07-17-2017 at 06:23 PM.