drain plug?

[captaincaveman]

Made a good start on the old gal today, battery fitted and apart from a stretched rear brake switch spring all seems good with lights etc, new plugs fitted, just waiting for ht leads, oil filter etc sprayed oil down into the cylinders , manually turned her over, then cranked her on the starter(plugs out), all seems good

Just a quick question i notice sometimes there is oil/fuel dripping out of the drain plug on what i think is the surge tank???(left hand side) is that anything to worry about?

[Mark Tiller]

Surge tank????are you sure its not the chain oiler? Which model of Zed?

[jimmock]

I hope it is not a CB 750 dry sump oil tank???????

[captaincaveman]

gpz1100 b1, between the injectors and air box thing, sits behind a polished cover, all four intakes go into a plastic box that the air sensor box slides into?

behind that polished cover infront of the side panel, theres a little rubber bung underneath

[captaincaveman]

found this pic on the net, its the large box at the back

[jimmock]

Sounds like blow by vapour / mist from the engine breather.

Which is definately better than the oil tank on an onder CB 750!!!

[captaincaveman]

Sounds like blow by vapour / mist from the engine breather.

Which is definately better than the oil tank on an onder CB 750!!!

thats gone over my head

[Pigford]

Thats the air filter housing - and a bit of oily fluid is acceptable - thats why there is a drain thingy at the end of the drain pipe

You often get a bit of oil/water due to condensation....

If there's loads p*ssing out, then maybe not so desirable.... check oil level ain't too high

[captaincaveman]

wouldnt say its p*ssing out, you can just see abit on that picture, i wonder if maybe some got into there when i hosed it down, but that was a couple of weeks ago? could it be coming back from the efi?

Its such a strange set up on the bike, you got the filter box, then the air sensor flap thing, then this, covers such a huge area

[garyd]

That box (Airbox) has a tube from the crankcases that allow vaporised oil to feed up into the airbox and get burnt up by the engine. But some of it condenses in the airbox and drains out...so if you have a lot, then the crankcases are develoiong too much pressure and pushing more oil vapour up into the box.

A symptom of leaking piston rings allowing some of the exhaust to slip by and go into the crank cases.

[Mark Tiller]

As piggy says...the oil level should be nearer to the lower level, a thes get to higher mileages they deffo produce more crankcase pressure which can push oil up into the airbox

[captaincaveman]

Thanks guys, my next job is oil and oil filter change, so i'll make sure its not too high when i top it back up

[captaincaveman]

That box (Airbox) has a tube from the crankcases that allow vaporised oil to feed up into the airbox and get burnt up by the engine. But some of it condenses in the airbox and drains out...so if you have a lot, then the crankcases are develoiong too much pressure and pushing more oil vapour up into the box.

A symptom of leaking piston rings allowing some of the exhaust to slip by and go into the crank cases.

ah ok, so you reckon i need to check the compression on each one to see if rings leaking?

[jimmock]

I would clean it all out thouroughly.

Check the engine oil level and give it a big long run.

Check it out when you get back home.

Damp horrible weather can cause all sorts of moisture problems.

[captaincaveman]

I would clean it all out thouroughly.

Check the engine oil level and give it a big long run.

Check it out when you get back home.

Damp horrible weather can cause all sorts of moisture problems.

cheers mate, will do