Moshi

Member
Nov 7, 2005
24
0
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
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.
 

Peer Lovell

Member
Nov 25, 1999
600
0
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.
 

windsormw

Member
Aug 8, 2004
39
0
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
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.
 

Moshi

Member
Nov 7, 2005
24
0
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
 

mtk

Member
Jun 9, 2004
1,409
0
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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