BMW R1200RT/R1250RT Forum

Decided to replace the window as it seemed obvious that this was the problem. I drilled it and put a self tapper in as someone suggested. This only pulled out and shattered the plastic. I picked this out and went to buy an oil seal puller.
Even though I used a proper tool I seem to have nicked the mating surface.
Before I get myself deeper in the shite are there any experts out there who can suggest the best way to clean up this surface? And should I use any sealant when putting it back?  :wonder:

Any pictures of the scratched mating surface to see how bad it is?

Scratched mating surface.

Must say, that doesn't look at all bad to me. Can you feel an edge when you carefully run your finger around the surface?

The only surface that you need to be concerned with is the inner wall that the window/Seal slots into. If you have some slight scratching you can use wet and dry paper to smooth out any imperfections.

michaelc2710 wrote: The only surface that you need to be concerned with is the inner wall that the window/Seal slots into. If you have some slight scratching you can use wet and dry paper to smooth out any imperfections.

Careful here. If you go in with an abrasive, think about which grade you use first off. You don't want to introduce more problems. Also you don't want to make that window a loose fit.
Installing engine-oil level indicator
Clean oil-level indicator (1) and sealing face (2) in the engine block.
Use only VERY fine wet and dry and work very carefully to remove
heavy deposits and corrosion residues.
Position the new oil-level indicator on the 'pusher' (No. 11 0 958) with extension
(No. 00 5 511) and handle (No. 00 5 500).
ATTENTION:
Use only brake cleaner for the installation process.
Spray sealing faces of the window glass and housing generously with brake cleaner.
Position oil-level indicator window square to the bore and rapidly and
without allowing it to tilt, install it with the pusher (No. 11 0 958) until
seated.
Install circlip
Refill with oil to correct level.
On completion of all work start the engine, allow it to heat up to
operating temperature, and check the oil-level indicator for leaks.

Cosmetic scratches are highly unlikely to leak, id just bang the new sight glass in and see how it goes. If it leaks, fix it.

And, once it's fitted and you're happy with it, don't under any circumstances let the bike tick over on the stand for more than a few minutes! Apparently, that can bugger the sight-glass through overheating, and it may be what happened to the original one in the first place.
Pete

milleplod wrote: And, once it's fitted and you're happy with it, don't under any circumstances let the bike tick over on the stand for more than a few minutes!

Very good advice to prevent melting of the plastics of the fairing etc.


However, I think his replacement window will now be glass instead of the early plastic windows.

bandytales wrote:
Very good advice to prevent melting of the plastics of the fairing etc.


However, I think his replacement window will now be glass instead of the early plastic windows.

Ahhh, I didn't know they'd changed them!
Pete

Yes the inner sealing lip is fine, but I can feel a few rough edges where the seal removal tool must have caught. Maybe I should just knock these edges off with maybe a dremmel?
I do not want to use wet & dry as this will affect a much larger area. Yes the old window was plastic and this one is glass. Need to get this sorted as I am missing getting out on the bike!!

I personally wouldn't use any abrasives, let alone a dremel! It will end up out of round if not exceptionally careful.

If there is an edge that is "likely" to interfere with the sealing, I would gently peen it out with a small hammer and a spoon. You have to make a judgement as to whether it is going to seal as it is, hard to tell from the picture you posted but it would be foolish to try and repair something that actually doesn't need it - on the other hand it would be a pain to assemble it and then have to work back to fix it.

Surely if the seal is at the back of the cast you want to make sure that the window seal is not damaged when it is pressed in?

Wouldn't disagree with that. If there are edges that are raised sufficiently to damage the seal on installation, I would use the hammer and spoon to fold those raised edges back to where they came from, as opposed to an abrasive solution to just remove material.

Cheers, think I will try that in the morning.