leak around bottom of cylinder

M

Moshi

Member

Nov 7, 2005

24

0

• Dec 16, 2005

• #1

Hey, I just finished putting my cr250 '99 together after a full crank rebuild. I also had to weld and fill inn a hole in the crank case. Now when I run the bike there is slight dust-attracting moisture around the bottom cylinder seal (front left). I tightened the bolts as much as was possible but the leak persists. I am not sure whether it is oil/fuel or water from the cooling circuit. The bike runs well...
should I worry about this? what could happen if I just leave it?
Moshi

 

Someone

Member

Mar 12, 2001

865

0

• Dec 16, 2005

• #2

It could be spooge coming from the pipe. I know when I put my new pipe on my YZ250, I didn't put in the inner spring/spacers in the pipe and it leaked spooge until I fixed it.

 

P

Peer Lovell

Member

Nov 25, 1999

600

0

• Dec 16, 2005

• #3

If there is a leak at the bottom of cylinder it has to be fixed. Try lifting the cylinder and spraying the paper gasket with some gasket sealer, then torquing down to spec.

 

W

windsormw

Member

Aug 8, 2004

39

0

• Dec 16, 2005

• #4

agreed

that problem must be fixed .......

I say take jug off , do a good inspection . For what a gasket cost u might as well get a gasket for ur troubles of inspection .

I assume that u are seeing coolant leaking . If u haven't done this job before . Get a manual ! Not that its a big job , a manual will awnser any questions u might have .


good luck ]

 

darringer

LIFETIME SPONSOR

Dec 2, 2001

1,029

0

• Dec 17, 2005

• #5

I had the same problem after rebuilding my 99cr a few years ago. I lifted the cylinder a few times but could not get it to stop leaking. I was using aftermarket gaskets and spraying them with sealer. Went back to the Honda gasket w/sealer, problem solved. It may only be a slight water leak. Or it may be leaking directly into the cylinder, which causes dirt/air to be drawn into the cylinder during the compression cycle. Not good.

 

M

Moshi

Member

Nov 7, 2005

24

0

• Dec 17, 2005

• Thread starter
• #6

Thanks for the feedback. Gaskets are kind of hard to come by here in Africa, could I use one of the high temp silikone liquid gaskets instead to seal the leak?
Moshi

 

M

mtk

Member

Jun 9, 2004

1,409

0

• Dec 17, 2005

• #7

That isn't a good idea. Gaskets have thickness and this thickness is accounted for in the set-up of the engine.

 

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windsormw

Member

Aug 8, 2004

39

0

• Dec 20, 2005

• #8

if u have an address u can order what ever u want