part no. 999 511 199 40 clamp, fuel lines

[Bukowski]

TL;DR:
are the metal clip pieces actually available somewhere new? what am I going to get if I buy it from Pelican which gets it from Germany - presumably the same single-piece plastic clip-nut I got from Porsche? how is this supposed to screw onto the car and hold the lines down with the rubber piece inside?

Here's a pic of the plastic nut+clip
http://c767170.r70.cf2.rackcdn.com/G99951119940.jpg

I am confused about part no. 999 511 199 40 , a fuel/brake line clamp, found on illustration 201-10, 201-15, 604-05, etc. On my car, the "clamp" is really a rather flat metal clip that forms the exterior of the fuel line attachment to the car, via the rubber mount in the middle. A plastic nut secures it all together on a threaded body bolt. An explanation is required before the questions:

on illustration 201-10 and also 201-15 (for early/late MY fuel systems), there are three parts, pos. 7, 8, and 9. 8 and 9 are the same numbers, being 999 511 199 40, while the other one for the rubber piece is different. Same thing goes for illustration 604-05 (brakes) except the fastener is missing. Now that I mention it, I think early MY's have a brittle plastic clip, not like late MY...

now, I bought *19940 from Porsche (please forgive me Pelican), and it is a single-molded plastic piece, having the flat clip part and plastic nut formed from the same piece of plastic. The rubber piece is simply a rubber piece, no worries there.

are the metal clip pieces actually available somewhere new? what am I going to get if I buy it from Pelican which gets it from Germany - presumably the same single-piece plastic clip-nut I got from Porsche? how is this supposed to screw onto the car and hold the lines down with the rubber piece inside?

Otherwise, I'll go looking for used or use some paint-on-rust paint.

[tholyoak]

I believe the simple answer is that this new plastic piece has superseded the previous two-piece plastic-metal assembly which I think had the part numbers 951-356-535-00; 951-356-541-02.
This is why both parts #8 and 9 in the new catalogue have the same part number.
If you want to retain the original metal-plastic arrangement you will have to get some used pieces.

Todd

[Bukowski]

I can understand the superseding. I'll need to get pics of this later, but the new part was confusing to me last time I tried figuring it out.

if anyone has tried this with the new part, the nylon pin appears to be pointed out from the rubber mount... the rubber piece sits on the clip snugly in one position, yet the pin points the other way. If the mount goes on the side with the pin, then the entire thing has to rotate to go on the car which means the lines go in afterwards. Unless the assembly is pressed onto the body bolt which is threaded.

Of course if that's how it has to go, then that's how it goes, it just doesn't look correct to me.

[kens_74_911s]

Have these also posted on your parts request thread.



Sent you a PM
Ken

[Bukowski]

warning : tedious detail ahead for those concerned.

I think the new style clip, being a solid single piece of plastic and being composed of an apparent nut/sleeve that screws on the body bolt, and a external clip that holds the rubber mount piece, is actually meant to have the nut piece either sawed out or broken off prior to use. See the pile of pics below to support this idea. I bet there is a name for this method, and I bet it is a standard procedure in the mechanical engineering world, when parts become more efficient to manufacture/distribute.

some views of the rubber mount with the new style plastic clip-nut piece



plastic clip close-up


comparing old style plastic nut with new style. one new style nut was already cut off with a rotary tool but not broken/cut out as suggested above:

[kens_74_911s]

Looks to me that the new plastic bolt may just need to be poped with a hammer once in position and it breaks away and drives down until it contacts the threaded stud. It is efficient to build two parts with one molding process if its done right. Have you tried that ?

[Bukowski]

Originally Posted by kens_74_911s

the new plastic bolt may just need to be popped with a hammer once in position and it breaks away and drives down until it contacts the threaded stud. ...Have you tried that ?

good idea, hadn't though of it - I'll consider trying it, or otherwise separating the nuts prior to assembling everything.

turning the plastic piece on the threaded studs might cut fresh complementary threads, and would otherwise be an aid in getting it off again. pounding it on would be fast... but not accurate. fascinating trivia.

I presume the shop manual will be missing details such as this - I don't even think it has fuel line replacement info, and haven't seen a tech bulletin on it either.

[Bukowski]

beautiful. just beautiful. 4 lb. dead-blow hammer, light tap, and pop - out it comes. give kens_74_911s a cigar.

... you know, there's a saying - "drowning in 2 inches of water".

[kens_74_911s]

I think they are intended to tap the otherway like when installing. line it all up over rubber piece and tap the plastic bolt down. Then get the allen wrench out. These body weld studs have a coarse thread . The triangular ID of the plastic bolt is typical of later body fasteners ( bmw and others) for wire ties and other tag on body items. It really does not "cut' a thread as much as the triangular ID opens up to accomidate the coarse thread and can be reused even if the non thread condition exists.
K