So I'm currently trying to clean my K up a bit so I decided to remove the fuel rail so I could start polishing the bit behind it. However my Haynes manual tells me that when I remove the fuel rail the injectors should all slide out aswell. However having removed the clips and all the bolts necessary they wouldn't 'slide out' so I used a bit of force and now instead of the injectors coming out the rail separated at the end of the injectors leaving them still in the engine, if that makes sense.

Am I missing something?

Also another question has anyone tried to remove the throttle bodies without taking the frame off, is it possible? and is it possible to get back on? (I mean including the airbox)

Regards,

Alex

Before removing the fuel injectors you should either blow some compressed air or vacuum around their bases as little bits of dirt/gravel can collect in the fuel injector wells and might fall into the cylinder when you pull each injector.

The easiest way to remove them is to leave them clipped into the fuel rail and pull on the fuel rail. If you've already removed the fuel rail them wiggle them around a little while pulling on them.

To put them back in:

1 - Put some motor oil on the O-rings at both ends of the fuel injectors.

2 - Install and clip them into the fuel rail.

3 - Line them up with the holes and then put a block of wood on the fuel rail and tap them in gently with a hammer.

Once you have everything back together start the bike and inspect for fuel leaks at the top and bottom of each injector to make sure they're all seated properly.

duck wrote:Before removing the fuel injectors you should either blow some compressed air or vacuum around their bases as little bits of dirt/gravel can collect in the fuel injector wells and might fall into the cylinder when you pull each injector.

The easiest way to remove them is to leave them clipped into the fuel rail and pull on the fuel rail. If you've already removed the fuel rail them wiggle them around a little while pulling on them.

To put them back in:

1 - Put some motor oil on the O-rings at both ends of the fuel injectors.

2 - Install and clip them into the fuel rail.

3 - Line them up with the holes and then put a block of wood on the fuel rail and tap them in gently with a hammer.

Once you have everything back together start the bike and inspect for fuel leaks at the top and bottom of each injector to make sure they're all seated properly.

Ye you see the stage I've got to is I've removed the fuel rail and the injectors wiggle, twist everything but won't come out?

It will take some force to pull them.  They've been sitting in there for decades and the O-rings have probably hardened some from age and heat cycles.

Even when you pull them with the fuel rail attached it takes some force. They don't just slide right out.  When I pull them with the fuel rail I usually use a small piece of wood to pry on the fuel rail.

Edit to add: You might try spraying some penetrating oil around the bases to see if that helps.

duck wrote:It will take some force to pull them.  They've been sitting in there for decades and the O-rings have probably hardened some from age and heat cycles.

Even when you pull them with the fuel rail attached it takes some force. They don't just slide right out.  When I pull them with the fuel rail I usually use a small piece of wood to pry on the fuel rail.

Oh ok thats reassuring good so they do need a bit of force. I've heard you should replace all you O-rings, what's their specific name or part number do you know? I wouldn't even know where to start to know what they're called. Cause they're O-rings each end isn't there.

The BMW FI O-ring part # is 13641730767 but they're insanely priced for a very common part.

You can probably find them on Ebay for a much better price.

The spec in the BMW parts catalog is 7,52X3,53.

Some notes that I have indicate the O-rings for a 1990 5L Mustang will fit so that might be a good place to start.

Here's a couple of US part #s for the O-rings:

ES70599

ACDelco 217-3366

Point-Seven-five wrote:https://www.youtube.com/watch?v=nK8MqxEeMJY

Nice find. That's hilarious.

Point-Seven-five wrote:https://www.youtube.com/watch?v=nK8MqxEeMJY

hahaha omg that makes me feel so much better!

duck wrote:Here's a couple of US part #s for the O-rings:

ES70599

ACDelco 217-3366

Wow thats really interesting I'll have a look thank you, ye cause I found the OEM ones for £2.39 each !! way to expensive

If you do a search here for injector o-rings you will find automobile models that use the same o-rings.  I seem to recall buying o-rings for a Ford Mustang at NAPA for my K100RS.  I think they cost me something like $6 for a pack of ten or twelve.

I bought a pack at one point and was glad I did.

The advice about starting and checking for leaks is important......in my last time in I had 2 leaks.....when I looked closely the two leaks had also got damaged O rings despite being careful.....so I had the necessary spares.

Anyone got any UK ideas, I had a look at the mustang ones and they're just as expensive as the OEM ones in the UK, though in the US they look dead cheap.

O-Rings in the US for two $3.27
https://www.amazon.com/ACDelco-217-3366-Professional-Injector-Return/dp/B001NZX4SQ

Whereas in the UK for two £64.17
https://www.amazon.co.uk/ACDelco-217-3366-Professional-Injector-Return/dp/B001NZX4SQ

Thats ridiculous

Search for 263991229142 on Ebay UK

duck wrote:Search for 263991229142 on Ebay UK

Wow   thats amazing I'll order a set now.