Kv6 fuel feed pipe to injection rail ?

[biffa75]

Hi folks,

Still awaiting parts to turn up, thankfully the seals for the fuel feed pipe arrived.
The pipe in question is a metal pipe that clicks into the end of the fuel feed pipe that is held in place with a metal clip and a few seals and spacers.

Because my.old seals were in a poor state when removing the feed pipe, it's hard to determine whether I have inadvertantly lost one spacer.

Here is a snapshot from someone working on their zs V6

I have the metal.securing clip
Plastic spacer that has a wider base at one end to sit flush against the metal clip

O ring

Second o ring

I'm sure between the two o rings there should be a really tiny spacer but.. I maybe missing this piece and I would sooner have this spacer in place despite it appearing very tight and secure at present time.

If anyone can confirm that there should be two small black plastic spacers or any pics etc

Thanks
Rob

[Lord of Hog]

No spacers on my V6 75. It's a tight enough fit without sticking anything else in there. Maybe they're a ZT thing?

[biffa75]

Thanks for the info,

I aren't sure as ours is a 75.

I've attached a photo that shows where the feed pipe is connected.

Thanks
Rob

[SD1too]

Originally Posted by Arctic

I cant see any spacer on this set up either?
https://the75andztclub.co.uk/forum/s....php?p=2595205

Hi Steve,

Your link concerns the pipe fittings between the LH and RH bank fuel rails. Rob's asking about the connection between the supply pipe from the tank and the LH bank rail.

Cheers!

Simon

[Arctic]

Hi Simon
Arhh ok sorry will remove the link so as not to confuse

[biffa75]

I've now posted a wanted ad for the spacers in question. Been getting confused, having been told that the seals and spacers should remain inside the injection rail.and shouldnt come away on the end of the feed pipe?.

The spacers in question are in the attachment below.
The spacer I am missing is the smallest one of the two spacers.

Thanks
Rob

[T-Cut]

Originally Posted by biffa75

I've now posted a wanted ad for the spacers in question. Been getting confused, having been told that the seals and spacers should remain inside the injection rail.and shouldn't come away on the end of the feed pipe?

The rings and the small spacer will usually stick in the rail end when the pipe is pulled out. It's the natural way the joint will separate due to the relative areas of contact. If you have to replace the rings, then all three components have to be winkled out of the rail end. This is without doubt when many spacers get lost. Refitting the rings and spacer is most logically done by fitting them onto the pipe end before re-insertion. Trying to fit them into the rail end first is prone to error. The rings need some sort of lube. Silicone grease is fine for all o-ring rubbers. If they're viton, then any sort of grease /Vaseline will do.


TC

[T-Cut]

Originally Posted by biffa75

I have the metal.securing clip.
Plastic spacer that has a wider base at one end to sit flush against the metal clip
O ring
Second o ring
I'm sure between the two o rings there should be a really tiny spacer but.. I maybe missing this piece and I would sooner have this spacer in place despite it appearing very tight and secure at present time.
If anyone can confirm that there should be two small black plastic spacers

In your parallel thread on this, I said:
From what I've seen on this, there are two o-rings and a plastic spacer. The spacer is easily lost and difficult to replace. This is why you sometimes see feed pipes with three rubber seals to compensate for the gap. This is incorrect since o-rings require the lateral support to work properly.

I'm afraid you've lost the small spacer.
It would be worth scouring eBay for a similar sized one in nylon. Measure the pipe and the rail bore and maybe find something here: https://www.ebay.co.uk/sch/i.html?_f...pacer&_sacat=0




TC

[biffa75]

Hi TC
Was trying to find the thread whilst working on the car and couldn't find it.

I do have one plastic spacer, but unsure whether there is supposed to be two spacers. If so. I'll begin the hunt
Sorry if it sounds as though I'm repeating myself.

Thanks
Rob

[T-Cut]

The spacer/collar you have goes against the clip on its wider face. Its inner face forms the stabilising wall for the outermost o-ring. This ring is stabilised on its other side by the missing spacer. This in turn provides the stabilising wall for the innermost o-ring. That's stabilised on the other side by the rebate in the bore of the rail connector. The spring clip compresses the o-rings so they are a snug fit on all four 'sides', radially and axially. Without this arrangement, the o-rings can shimmy sideways and fail to seal under pressure. The use of a third o-ring as a substitute spacer isn't providing the same sealing surface since the rings in contact with each other have soft surfaces. It's better than nothing as evidenced by the number of rails using three rings, but it's not anywhere near as reliable as the correct setup.

TC