[StainlessNiel]

Hi guys, back again lol
She's a 99 reg 00, 955i daytona custom lol (speed triple mode)
52k regularly serviced and used daily since May 2019

I was getting the bike ready for mot and noticed the water was low ( I wasn't worried as its happened in the past as the header tank has been known to leak at the connection seal on the tank)
So popped off the metal cap filler under tank flap and after 3 jugs knew Sompting was wrong.... So I looked around the pipes for leaks an nothing coming from the bike, turns out all the water had breeched into the engine oil.

Now my instant thoughts are....

Head gasket ( even though bike runs sweet) obvs not been run since water breech yesterday)

Someone mentioned the cylinder sleeves have a seal but I can't locate it on any schematics or parts lists

I'm gonna be doin the chain an tensioner an headgasket, I'll also wanna do the valve shims too. 1 thing that does worry me is the oil has been quite fuely the last 2 changes and am I likely gonna be doin rings aswell as sleeves?

Is there anything else you would recommend to do on these engines whilst open?

And by chance am I really lucky and is it just a daft valve that has something to do with oil an water lol ( wishful thinking)

I've asked a few questions there and any help will be greatly appreciated as I love my tona.... I'd only replace her for a new 1200 monster R lol
(even then I wouldn't part with her lol)

 

[Dr.Shifty]

If the water was flowing into the oil as you poured it in I can't see it being a head gasket, surely something that leaky would show up when riding.

A compression check will let you know if the rings are worn.

Another thing to check is the water pump shaft seal. That might be your leak point.

 

[StainlessNiel]

Thanks shifty, I had a thought on that but having replaced it last year, to my understanding they have a weak point between two seals, either the oil seal goes or the water and if either do go it usually leaks off out the bottom of water pump, That's how I spotted the leak last time. Unusual for both to go and not the weak point. Please Someone correct me if I'm wrong lol
No I never notice any problems while riding which only means it's not blown across the cylinders but then there may be a crack in the head or even the block but honestly couldn't tell you how long it's been out of water, I check weekly but can do 200 mile a day sometimes (plus been parked up in shed since december. I guess it's tear down time although I will check the pump first just to rule it out

 

[DonTheMan]

The liners don’t have a seal that can be replace, theŷ pushed into place with a bead of sealant round the bottom. They don’t usually leak unless they’ve been disturbe but maybe after a long time...
if coolant is going straight into the oil and it runs ok, I’d say that rules out the head gasket.
and you can pull the water pump out of the side of the motor with the hose still connected, top up coolant and see if it leaks there.

 

[StainlessNiel]

The liners don’t have a seal that can be replace, theŷ pushed into place with a bead of sealant round the bottom. They don’t usually leak unless they’ve been disturbe but maybe after a long time...
if coolant is going straight into the oil and it runs ok, I’d say that rules out the head gasket.
and you can pull the water pump out of the side of the motor with the hose still connected, top up coolant and see if it leaks there.

That's a good idea to test pump... Thanks
So it unlikely the liner seals are broken and that leaves the pump or a cracked jacket in there somewhere unless you or anyone could suggest anything else

 

[StainlessNiel]

Tested the water pump and it perfect bar a little light rusting to the blades which is normal but it hold water no problem.
Teardown mabey tomorrow so I'll update with some pics.
Cheers

 

[DonTheMan]

That’s a pain guess it’s head gasket, liner seal or (unlikely) crack in head.
The head should come off without lifting the liners so you can pour liquid between the liners and see if it leaks away. If it doesn’t then there’s something awry with the head.
If the liners lift then they have to be done any way.

 

[RampantParanoia]

If you have the head off, don't turn the engine over without finding another way to secure the liners. They are held in place by the head and the pistons can lift the liners without it and you'll need to pull them all and reseal them.

 

[StainlessNiel]

Cheers guys I'll update as to what I find and I can always look at it like..... I wanted it powder coated anyway

 

[StainlessNiel]

If you have the head off, don't turn the engine over without finding another way to secure the liners. They are held in place by the head and the pistons can lift the liners without it and you'll need to pull them all and reseal them.

Are they a pain to seal, I'm thinking it might be worth it seein as I'm in there anyway

 

[RampantParanoia]

The sealing itself is pretty simple, clean off the old sealant with a wooden scraper etc, run a bead of Threebond 1215 round the shoulder and install the liner, let it cure. Installing the liner over the piston without trapping oil rings is very very fiddly, have a read of my "parts bin special" thread on the speed triple forum for my account of getting it wrong repeatedly.

 

[StainlessNiel]

Excellent, cheers