Fuel Distributor Stopper

[BOPE]

Does anyone know of an alternative to the USD ~$60 fuel distributor stopper for a 1980 911 SC? The ~$60 price for a piece of wire with a small blob of rubber on the end just seems excessive.

So, I'm looking for less expensive alternatives, any ideas?

Does anyone know the diameter of the access hole? I may be able to make something if I know the diameter of the hole that needs to be sealed.

Thanks!

Jason

[Flat6pac]

I have a couple in the drawer, reasonable offer plus shipping
PM to reply.
Bruce

[gptom]

I used a golf tee on my VW

[boyt911sc]

Originally Posted by gptom

I used a golf tee on my VW

I used a golf tee and ball point pen tip for my 911 for better handling. Just kidding.

Tony

[83_Silberpfeil]

on your web browser / search engine, enter search string: "De Lorean 102392A"

Looks the same ; no guarantees --- good luck!

Originally Posted by BOPE

Does anyone know of an alternative to the USD ~$60 fuel distributor stopper for a 1980 911 SC? The ~$60 price for a piece of wire with a small blob of rubber on the end just seems excessive.

So, I'm looking for less expensive alternatives, any ideas?

Does anyone know the diameter of the access hole? I may be able to make something if I know the diameter of the hole that needs to be sealed.

Thanks!

Jason

[BOPE]

Originally Posted by boyt911sc

I used a golf tee and ball point pen tip for my 911 for better handling. Just kidding.

Tony

Thank you, I've shoved a small pencil in the hole for now.

Jason

[BOPE]

Originally Posted by 83_Silberpfeil

on your web browser / search engine, enter search string: "De Lorean 102392A"

Looks the same ; no guarantees --- good luck!

WOW, it sure does look the same and for $7 it's an absolute bargain!

Jason

[PeteKz]

I bought that part from Delorean a couple years ago. It fits. It's used on nearly all CIS engines across a number of manufacturers. The Delorean engine was from a Volvo.

[ammonman]

Put a thin smear of silicone grease on the rubber plug so it is easy to slip in and out. Without some lubrication the rubber will eventually come loose from the stainless rod.

[Schulisco]

It's a simple plug only and only a cosmetical thing. There is no functional need for it, as it's placed in front of the sensor plate and the air going through that hole is measured too. So this is no vacuum leak aka false air. The technical benefit is preventing clogging the hole by dust. That hole is standard for CIS sensor plate housings of many cars. So you can grab one also from Volkswagen classic parts too: Part no. 035 133 465, used on VW Rabbit/Golf/Scirocco Mk 1:

https://www.volkswagen-classic-parts.com/catalog/de_de/part/035133465

The hole in the sensor plate housing is 7mm wide. Plug is 80mm long.

[BOPE]

Originally Posted by Schulisco

It's a simple plug only and only a cosmetical thing. There is no functional need for it, ...

It appears to me that the stopper prevents unfiltered air from being sucked in to the combustion chamber. Or have I misinterpreted something?

Jason

[E Sully]

You are correct BOPE. It will not affect metering of the air, but allow some unfiltered air in.

[Schulisco]

That amount of unfiltered air is that low, so it's neglectable. Or how do you explain that thousands of CIS cars running without these plugs with absolutely no issues because of that?? Mine haven't had this plug too when I purchased the car ten years ago and I don't want to suspect how many years it was running without it. From factory they had a breakaway screw instead. I seriously doubt that any mechanic replaced that screw by this plug anytime they tinkered that screw setting although they should not do this. But due to vacuum leaks on the engine they started to fiddle around without any knowledge and screwed up the setup of the CIS without solving the real issue(s)...

[PeteKz]

Thomas, yeah most of the CIS cars probably don't have this plug, but it's still good mechanical practice. I live 1/2 mile up a gravel road, and it gets really dusty in the summer, so in my case, it could cause accelerated engine wear.

[Schulisco]

PeteKz, I totally agree... The more dusty roads the more such minor things make the difference.... Never tested how much air being sucked there when missing the plug, but still I won't expect that much. The main airflow comes over the filter and airbox and won't touch that area where the hole is located as the venturi effect will make that much difference.

[E Sully]

Most air flow will come through the air box, but over time enough will get sucked through to gum things up a bit. The hole is right over the main points of the system. I've cleaned up a couple. I don't want any crud and moisture building up internally to gum up the carefully balanced plate, and especially the fuel distributor piston.