F800GS Big End Replacement

[cookie]

bmw seem to sell "short" engines. i'd hazard a guess that one would be c. £2.5K+

a short engine would be missing pistons, barrels, head, alternator etc. as such, i'd want to be very sure that the original heads/cams had not been suffering from oil starvation.

 

[stephen.stallebrass]

If you're asking the question, you can't afford it!

I call non-sequitur but your probably right!

 

[v8legend]

a short engine would be missing pistons, barrels, head, alternator etc.

My definintion of a short engine includes pistons and barrels? I thought it was everything below the head, but with no ancilliaries?

 

[JJH]

My definintion of a short engine includes pistons and barrels? I thought it was everything below the head, but with no ancilliaries?

Thats what a short engine is in car / van terms is

 

[JJH]

Thats what a short engine is in car / van terms is

You get block crank pistons and oil pump all put together. I don't know what happens these days or do I know what happens in the bike side. JJH

 

[grandru]

Hello,

if you are thinking that the big end on the photo is f... up then you are wrong,
they called this: cracked bearing, they make it into one piece and than "crack" it in two.
so the parts fit 150%, it is much better than 2 separate made pieces.
They use in in the best engines.

regards

 

[Timolgra]

Hello,

if you are thinking that the big end on the photo is f... up then you are wrong,
they called this: cracked bearing, they make it into one piece and than "crack" it in two.
so the parts fit 150%, it is much better than 2 separate made pieces.
They use in in the best engines.

regards

I've seen them being made at the BMW factory, they use a laser to create the 'breaking point' then pull the big end cap off

 

[stephen.stallebrass]

Turns out it's not the 'big end', simply a seized fan, which is now free - it may need replacing later but everything seems fine now. Need to take it on a long run to check it out but it's looking good. Do need to work on the steering head bearing (head racers) though. Thank you Balderston's BMW Peterborough and Robbin in particular, for not charging me the hours diagnostic labour.

So what does that mean for the BMW garage in Elst, Netherlands... liars, cheats and or imbeciles? I ended my trip early and was towed home based on their shitty advice and I need not have done. I could be in Switzerland now, instead I'm here in Blighty. Nevermind, I'm relieved its nothing big. Just have to quench my thirst with a ride around the British Isles after I've got it ship shape again. New job starts soon anyway...

 

[Greg Masters]

It could be Balderstons are the imbeciles.

A seized fan doesn't explain the oil pressure light.

Time will tell .....



Greg

 

[Ducksbane]

It could be Balderstons are the imbeciles.

A seized fan doesn't explain the oil pressure light.

Time will tell .....



Greg

As it turns out it does!

The canbus tries to turn on the fan ... It can't and detects the current draw. It then activates the yellow warning light (which is often misinterpreted as an oil warning). If actual overheating occurs a red light comes on. It's very common ... We should all regularly check that our fans rotate freely I guess.

 

[stephen.stallebrass]

As it turns out it does!

The canbus tries to turn on the fan ... It can't and detects the current draw. It then activates the yellow warning light (which is often misinterpreted as an oil warning). If actual overheating occurs a red light comes on. It's very common ... We should all regularly check that our fans rotate freely I guess.

That's reassuring to hear!

 

[Greg Masters]

As it turns out it <strike>does</strike> could!

Fixed.

Whilst you were posting your words, I was PM-ing Stephen with the same possibility.

Greg

 

[Ducksbane]

Yes ... Could ... but I've seen this happen at least three times, all with a fan with some stones in in it. You should check your fan regularly.

This is a good point of the much maligned Canbus. If you were riding a Super Tenere 1200, and if you happened to drop it on the side with the radiator, and if you damaged the cowling of the fan so it couldn't spin, but you didn't know, then if the fan tries to come on it burns out the fan motor and the bike overheats! It happened in South Africa.

 

[chas820]

Maybe and it`s only a maybe it could be a reason why BMW tell you to run your engine until the fan starts when you check your oil.I mean we all check our oil before we go for a ride, don`t we??