Bosch K-jetronic - Fuel Filters - What, Where and Why

#youtube #kjet #car
What other fuel filters are there apart from the main service filter.
Four outlet filters
One main body filter
One fuel inlet filter
The four outlet mini filters are 5.5 mm x 10 mm
The main fuel inlet filter is 7.5 mm x 20 mm
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[@georgegeorgiadis8104]

Where can I buy these filters, especially the central one that sits inside on the metering head.

[@GreyGooseRestorations]

Missingparts.de is the best place

[@יגאלסגל-ל3י]

Hi, thank you for the great video. Can you tell me please where I can find the filters? Thank you again.

[@GreyGooseRestorations]

The mini filters can be bought from the likes of missingparts.de the other cylindrical filter I can find so use a new banjo bolt with a smaller inside diameter to fit a readily available filter and the main big filter is no longer available or anything similar so it's a case of cleaning it

[@robinlaker]

We used to get a fair few k-jet cars in with running issues and non-starting that other garages couldn’t fix. The majority were down to that banjo filter.

[@GreyGooseRestorations]

Knowing dealer servicing most likely they didn't even remove them

[@robinlaker]

@@GreyGooseRestorations I really appreciate you sharing your knowledge of K-jet. I’m familiar with the basics of it but it’s been a good 16 years since I’ve looked at one. I’m about to embark on mk1 16v swap so this series is perfect 👍🏻

[@GreyGooseRestorations]

@robinlaker any problems just ask 👍

[@deltoroJim]

Not sure what your source is that states the filters were added to protect the debris during the assembly of the engine? My experience with German manufacturers is they had a very high quality and they were not be concerned about debris in their factories. Their concern was rather contamination in the gasoline and during engine maintenance. Unless you have Bosch documentation that states removal of these filters is OK, then you a doing a disservice to your viewers.

[@GreyGooseRestorations]

It stated in the vw service schedules that dealers had in the late 80s early 90s, out of say 10 units I only find one or two that still have these fitted albeit heavily clogged.

[@ramarakeshv]

Great video info sir. Hope u can show us about warm up regulator electronic. Where to buy and best ones

[@simonmenzies3142]

Love these videos and the fact you are happy to share your knowledge. This will keep so many of these cars going for many many years that otherwise would be scrapped or used as parts cars. This is the kind of stuff that could be lost very soon. But now shall be pasted on👍🏻👍🏻👍🏻

[@GreyGooseRestorations]

Thanks, definitely I've had a few people who have got cars running after a simple fix off the back of one of my videos, best was a Ford XR4x4i - 20p O ring later and it runs

[@simonmenzies3142]

@@GreyGooseRestorations it’s amazing we’ll done. Once it becomes a fuel issue that’s hard to find those cars just then sit until they are scrapped! 👍🏻

[@GreyGooseRestorations]

@simonmenzies3142 exactly and we can't just been wasting classics these days, need to be saved

[@davidwort37]

Another great video 😀 did you know there is another similar filter inside the supply tube (blue pipe) of the main fuel pump housing from the tank? Where the short 7mm to 11mm connecting hose pushes onto the pump housing

[@GreyGooseRestorations]

No but i will look now, thanks 👍

[@jasonreynolds3596]

Absolutely brilliant video. Nothing worse than doing a restoration and the engine runs like junk. I will add this to my restoration list of things to do ! Thanks

[@GreyGooseRestorations]

Thanks 👍

[@tubytom]

Yet another great video, thanks for sharing! One question, you sort of advice to remove the filter in the banjo bolt, but what about the others? Would you prefer to replace/clean them or rather remove them all at once? Obviously provided everything is in good shape at the fuel tank/fuel lines and the normal filter is serviced as intended.

[@GreyGooseRestorations]

Thanks, the banjo one should have been removed at first service so its not actually required. The other ones inside the metering head are a case of when they are at the point of requiring replacement is when the metering head is displaying issues fueling correctly and needs to be rebuilt.

[@tubytom]

@@GreyGooseRestorations Ok clear, but would you then replace our just remove the ones in the meeting head? Much appreciated

[@GreyGooseRestorations]

@tubytom the ones in the metering head need to be there so it would be a replacement.

[@ronnie8752]

Again great vid. Thanks

[@GreyGooseRestorations]

Thanks 👍

[@big62]

I would just like to say I bought an Audi 90 with a similar bosh k-jet system that would die under throttle. It had been at 4 garages and 16 years off the road and nobody could figure it out. Thanks to your video I was able to take it apart and found the inlet filter was plugged. I didn't have the confidence to take the rest of it apart but I soaked it all in carb cleaner and reconnected it, opened the air plate all the way, left the injector lines off and turned the ignition on and a whole heap of yellow fuel came spraying out. After that, the car ran great again. Thank you for your videos

[@GreyGooseRestorations]

That's awesome, glad I was able to help

[@RudeLubeuk]

Great stuff as usual 🤙

[@GreyGooseRestorations]

Thanks

[@jamescormack2216]

10/10

[@GreyGooseRestorations]

Thanks

[@Bodga]

That filter in the banjo bolt gave me a headache a couple of years ago! It all started when I decided to chuck injector cleaner in my fuel tank. It wasn’t long before I started having problems with the car holding back at hard acceleration. After playing parts darts with the ignition system someone on a forum told me about this filter. I removed it and the problem disappeared.

[@GreyGooseRestorations]

Injector cleaner caused me some issues on kjetronic a while back, 2 injectors later and fixed, they were less than a year old too

[@W124phreak]

I'm so glad I found this. I was about to get some injector cleaner for my elderly benz. I don't think i'll bother now!

[@jasonbirch1182]

Does that book cover Mercedes stuff as well? Is there a book number on it?

[@GreyGooseRestorations]

Yes, plus there is also a one that specifically covers Mercedes k-jetronic too, if you search bosch K-jetronic it'll come up

[@jasonbirch1182]

@@GreyGooseRestorations not found the mercedes one yet but I got a digital copy of the other one.

[@JP-mu3xl]

@@jasonbirch1182 I have an 85 model SL, with K-jet and yes, the Chinesium brass fuel fitting internal plastic bit swelled up and prevented fuel into inlet for fuel dist. So, I have a lot of PDF's from Mercedes on the r107, plus plugging exhaust ports going into intake to get my 24MPG, good luck!

[@jasonbirch1182]

@@JP-mu3xl 24mpg from a 500sl?