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ZZR 1100 D OILY PLUGS


handyandy24
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Hey guys


Can I have any help please with what is causing this problem and how easy is it to fix [ DIY? ]. The bike is a ZZR 1100 D model. It runs but rough. I have had the carbs off and they are fine. When I take the spark plugs out they are covered in oil [ on the threads and at the electrode end ]. It is oil as you find in the sump and is liquid – rather than an oily deposit etc ]. Also down the tube where the plugs sit can be seen oil when the plug is in situ. The bike runs but very roughly and will not idle. There are no oil leaks that I can see. Any help appreciated.


Thanks

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It runs but rough.

When I take the spark plugs out they are covered in oil [ on the threads and at the electrode end ]. It is oil as you find in the sump and is liquid – rather than an oily deposit etc ].

 

the worst scenario is the valve stem seals have poped or you've got a bent valve or a poped piston oil ring.


is it all cylinders or just one or two?


the best test at this stage is a compression test on each cylinder. halfords sell a simple gauge for this although you will probably need some form of adaptor. you should get good compression on each cylender and they should all be roughly the same.


once you've done that, it should be pretty obvious what to do next.... buy a new engine or investigate the ignition/carbs etc :|

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All 4 pots are the same. Some oil down the sleeve as you look down at the plug and any taken out have oil on the threads and electrodes. Why would the ignition be the cause of the liquid oil?


Thanks for the help.

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All 4 pots are the same. Some oil down the sleeve as you look down at the plug and any taken out have oil on the threads and electrodes. Why would the ignition be the cause of the liquid oil?


Thanks for the help.

the ignition isn't the cause, the oil is leaking in through the seals at the side of the sparkplugs

see picture - 11009a


for further info, parts, diagrams

http://www.cmsnl.com/kawasaki-1993-d1-z ... E1112.html

cylinder-head-cover-1993-d1-zx1100_bigKAE0392E1112_7158.gif.2ad6958ba5f3debaa9cfb5d04f55ae08.gif

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All 4 pots are the same. Some oil down the sleeve as you look down at the plug and any taken out have oil on the threads and electrodes. Why would the ignition be the cause of the liquid oil?

 

the ignition is a possible cause of the bike not running very well. if you have oil over all 4 ignition leads or plugs, that could also be a cause :wink:


if your rocker cover seals are leaking, that wouldn't put oil on the electrode.


it's unuasual for all 4 oil seals to leak simultainiously. have you had the rocket cover off recently?


if you clean all the plugs and the HT leads and it still doesn't run smoothly, you'll need to delve a bit deeper. fixing the simple stuff first is always best though...


it is possible if your engine is worn or if the crankcase breather os blocked, that pressure is building inside the engine case causing the seals to leak.


simple test is start the engine and take the oil filler cap off. put your hand over it and see if you feel air being expelled. you will feel air movement but is you put the palm of your hand over it and rev the engine, you'd have a possible problem if air is pushing against your hand.


one other cause is the crankcase vent system. look at part 1109B in the exploded view WalneyFrankie gave you. this causes excess crack pressure to vent into the exhaust port so it can be burnt off (reducing bike emmissions) but can stick. it did on my ZX9r with the same system and can cause oily deposits on the exhaust valves and ports.


really need to know more about the bike though. how many miles has it done, is this issue recent or has it been this way for ages. has it been serviced and have the valve clearances been checked recently?

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Thanks everyone for your replys. It is a 1995 ZZR1100 30k miles. I put it in the local Kwacka bike shop and they have said that the problem is that the rocker cover and "o rings" where the plugs are have blown through. I have only just bought the bike and the suspect seems to be that the previous owner has beeen doing his own servicing but not always replacing the gaskets when the "lid" has been off. Anyway bit of a relief as much bigger cost if prob further down the engine.

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