KV Injector advice needed. - Page 2

moonwatcher · 05-05-16, 04:32 PM

As I posted, I repaired mine, it was split along the jubilee clip about two inches, degrease and I got a bicycle tire repair kit, there was a patch about three by two, just the job.
You could do a temporary repair while you source another.

dockertrigger · 05-05-16, 04:39 PM

I think this may have a similar split around the clip also, I've wrapped a load of black insulation tape around it for now and it does seem to be running better now.

I'm wonder now if it upset it all when i recently changed the air filter!

moonwatcher · 05-05-16, 05:12 PM

The rubber boot was dirty and grimy on mine, when I refitted it, the tickover was all over the place.
I patched it and then fitted the clip over the patch, been ok for the last four months.
I suspect it had been split for years and I must have disturbed it

quattromnc · 05-05-16, 05:18 PM

Thats good news ☺

Be careful with a patch, the only smooth surface is on the inside, if you rely on glue alone to hold it, you won't know if it fails at any point until that patch fires its way down your manifold, if you can try to make sure its pinched by the jubilee clip.

Some have had success with "liquid rubber". Im not sure of any brands but it's like a black silicon tube, the applied rubber has a solvent in it so eats in to the surface of the existing rubber and makes it almost one piece.

If you know of anyone that deals with rubber roofs or rubber tanking systems, they'll use it regularly for joints and repairs.

quattromnc · 05-05-16, 05:31 PM

Im on my moble, the link isnt copying propely, but search for Bison Liquid Rubber, that stuff will last longer than the rest of the rubber ☺

dockertrigger · 11-05-16, 07:09 PM

I ordered some of that liquid rubber as you recommended which arrived yesterday, I've guled up the splits but they don't seem to have cured it but i have found what the fault is now...

One of the injector seals is worn so the injector wrobbles in it's hole, that would cause the problem. I've bought another ccar today so I'll probably be selling this one on now.

moonwatcher · 11-05-16, 08:00 PM

Why not get new seals and replace, IIRC less than £30

dockertrigger · 11-05-16, 08:14 PM

Someone on ebay is selling the seals for about £1.20 each, its just getting the old injectors out, it does look a bit of pig of a job?

moonwatcher · 12-05-16, 06:38 AM

Undo the socket headed screws holding the injector retainer (number 22),
pull out the injectors, (leave the injectors connected to the fuel lines) with grips,
remove the small O rings (7a),
remove the larger O ring (7),
wipe and clean the outside of the injectors,
fit the larger O seals, I warmed them in hot water, add suitable grease to ease insertion

fit the small O seals (I didn't replace these)
leave the plastic inserts (8) alone they'll probably break,
push the injectors home and refit the bar (22)

dockertrigger · 12-05-16, 10:53 AM

I'll give that a try then, thanks!

05-05-16, 04:32 PM	#11
moonwatcher 4 ring whore! Classic Audi Club Member Join Date: Jul 2008 Location: Barrow in Furness, Cumbria Posts: 2,049	As I posted, I repaired mine, it was split along the jubilee clip about two inches, degrease and I got a bicycle tire repair kit, there was a patch about three by two, just the job. You could do a temporary repair while you source another. __________________ Coupe Quattro 1985

05-05-16, 05:12 PM	#13
moonwatcher 4 ring whore! Classic Audi Club Member Join Date: Jul 2008 Location: Barrow in Furness, Cumbria Posts: 2,049	The rubber boot was dirty and grimy on mine, when I refitted it, the tickover was all over the place. I patched it and then fitted the clip over the patch, been ok for the last four months. I suspect it had been split for years and I must have disturbed it __________________ Coupe Quattro 1985

11-05-16, 08:00 PM	#17
moonwatcher 4 ring whore! Classic Audi Club Member Join Date: Jul 2008 Location: Barrow in Furness, Cumbria Posts: 2,049	Why not get new seals and replace, IIRC less than £30 __________________ Coupe Quattro 1985

12-05-16, 06:38 AM	#19
moonwatcher 4 ring whore! Classic Audi Club Member Join Date: Jul 2008 Location: Barrow in Furness, Cumbria Posts: 2,049	Undo the socket headed screws holding the injector retainer (number 22), pull out the injectors, (leave the injectors connected to the fuel lines) with grips, remove the small O rings (7a), remove the larger O ring (7), wipe and clean the outside of the injectors, fit the larger O seals, I warmed them in hot water, add suitable grease to ease insertion fit the small O seals (I didn't replace these) leave the plastic inserts (8) alone they'll probably break, push the injectors home and refit the bar (22) __________________ Coupe Quattro 1985

05-05-16, 04:39 PM	#12
dockertrigger Grown up member Join Date: Oct 2010 Posts: 35	I think this may have a similar split around the clip also, I've wrapped a load of black insulation tape around it for now and it does seem to be running better now. I'm wonder now if it upset it all when i recently changed the air filter!

05-05-16, 05:18 PM	#14
quattromnc Grown up member Join Date: Mar 2011 Location: Newton Mearns, Glasgow Posts: 177	Thats good news ☺ Be careful with a patch, the only smooth surface is on the inside, if you rely on glue alone to hold it, you won't know if it fails at any point until that patch fires its way down your manifold, if you can try to make sure its pinched by the jubilee clip. Some have had success with "liquid rubber". Im not sure of any brands but it's like a black silicon tube, the applied rubber has a solvent in it so eats in to the surface of the existing rubber and makes it almost one piece. If you know of anyone that deals with rubber roofs or rubber tanking systems, they'll use it regularly for joints and repairs.

05-05-16, 05:31 PM	#15
quattromnc Grown up member Join Date: Mar 2011 Location: Newton Mearns, Glasgow Posts: 177	Im on my moble, the link isnt copying propely, but search for Bison Liquid Rubber, that stuff will last longer than the rest of the rubber ☺

11-05-16, 07:09 PM	#16
dockertrigger Grown up member Join Date: Oct 2010 Posts: 35	I ordered some of that liquid rubber as you recommended which arrived yesterday, I've guled up the splits but they don't seem to have cured it but i have found what the fault is now... One of the injector seals is worn so the injector wrobbles in it's hole, that would cause the problem. I've bought another ccar today so I'll probably be selling this one on now.

11-05-16, 08:14 PM	#18
dockertrigger Grown up member Join Date: Oct 2010 Posts: 35	Someone on ebay is selling the seals for about £1.20 each, its just getting the old injectors out, it does look a bit of pig of a job?

12-05-16, 10:53 AM	#20
dockertrigger Grown up member Join Date: Oct 2010 Posts: 35	I'll give that a try then, thanks!