Help! Crankcase defect??

dirk · Post by **dirk** » Mon Nov 26, 2007 3:40 pm

Hi folks

A short time ago i have changed the crank, because the right hand side exhaust has great many smoked and i thought the crankseal is broken-down and the engine burn gear oil.
Now , if the engine warm the right hand side exaust smoke much much more
(a real wall of smoke) than te left if i turn the throttle full.
It smells like gearoil
i have fear the crankcase is defect.. Shocked

did that already have one of you?

regards
Dirk

mj43 · Post by **mj43** » Mon Nov 26, 2007 10:15 pm

Check for cracks - if a crank is badly balanced or out of line then it can crack the cases

the-elf · Post by **the-elf** » Mon Nov 26, 2007 10:35 pm

Dirk where abouts are you? I could sent you some Liquid penetrant, cleaner and developer for crack detection, but as the're aerosol based I'll have to check if I can post them to you.

Charles · Post by **Charles** » Tue Nov 27, 2007 12:05 am

the-elf wrote:Dirk where abouts are you?

Dirk is from Dortmund, Germany

the-elf · Post by **the-elf** » Tue Nov 27, 2007 12:30 am

OK then that's easy. It'll be even easier if you/dirk know someone who works for E-on? If you do I can post the crack detection gear though work. That'll save loads of problems.

dirk · Post by **dirk** » Tue Nov 27, 2007 10:19 am

Good morning

@the-elf
Thanks for your offer.

I will take up with Charles contact.
I inquired, what costs a new housing.
A new housing costs ~700,-GBP

What is E-ON?

No luck with the new machine.
New Crank, new Kipsvalves, "new" stator, cylinder and pistons in good condition, reed valves ok, carbs good...
and now this bullshit.

Is the repair of the housing worthwhile itself?

regards
Dirk

Charles · Post by **Charles** » Tue Nov 27, 2007 10:57 am

Hi Dirk,

dirk wrote: What is E-ON?

wake up, das Energieunternehmen (energy supplier) meint Elf.

I for myself don't know anybody who works for E-ON.

Cheers,
Charles

dirk · Post by **dirk** » Tue Nov 27, 2007 11:36 am

Hi Charles

"What is E-ON?"
Where is my coffee?

I don't know anybody who works for E-ON

Charles · Post by **Charles** » Tue Nov 27, 2007 12:01 pm

Hi Dirk,

if you want to use the crankcases of my spare engine, they're yours. Just get me a decent set in the near future, so I can rebuild it again.

Cheers,
Charles

the-elf · Post by **the-elf** » Tue Nov 27, 2007 12:57 pm

dirk wrote:Hi Charles

"What is E-ON?"
Where is my coffee?

I don't know anybody who works for E-ON

Worth a go. I can get the crack detection bits posted to you if you need them? You should be able to see the cracks but they'll take some looking for. Are there any external oil leaks? if so start looking for the cracks in that area.

The easiest way to repair them is once you have identified the crack is to machine a Vee in it using a dremil cutter on both sides, then use some plastic metal to fill the vee's back up and overlap it onto the good metal on both sides. Then sand it back down smooth on the inside of the crank case. There's no need to sand it down inside the gearbox or on the outside except for clearance and/or looks.

dirk · Post by **dirk** » Tue Nov 27, 2007 4:29 pm

Hi

Everything is close from the outside.
I ask still a few friends.
Possibly they can find the tear.
Otherwise, I return gladly to your offer.

Again thank you!

@Charles
in few minutes you have a mail.
Its much better for me to answer in german...

Dirk

dirk · Post by **dirk** » Thu Jan 17, 2008 11:14 am

hi..

I dismantled the housing.
And ????
The mechanic assembled the housing halves without sealants.

the halves are perfectly brightly.
you can see the gap between transmissions and crank cases with the eye. Now i know why transmission oil burned.

what a stupid mechanic......

dirk

ScottaKR · Post by **ScottaKR** » Thu Jan 17, 2008 12:04 pm

Are you sure that guys even a proper mechanic??

Still, it's a good thing that you found the problem at last.

mgtkr1 · Post by **mgtkr1** » Thu Jan 17, 2008 6:09 pm

what a tosser, this is one of them 'must do things' even the most basic of home mechanics would be aware of. glad it isnt knackered anyway. not a mega job to rectify but a pain in the arse, especially given the circumstances.