coolant in oil? 85 KTM 250

[vicbikeparma]

Hello, looking for some help. I'm trying to remove the propeller, was wondering if there is a trick with stopping the propeller from rotating and I saw someone remove one on a newer KTM and it had a left threaded bolt. Do the older bike have the left thread?

Thanks

Victor

1985 KTM 250
1965  Vespa 150

[DKWRACER]

Hi, my 84 250 has a d-shaped shaft, matches up with the impeller. lefty loosey...

[vicbikeparma]

Thanks, got it. It's not like newer bikes. Can't see seal. Need to remove side cover.

Victor

1985 KTM 250
1965  Vespa 150

[vicbikeparma]

there is no exposed seal to change, only thing is to remove the clutch plate. How is the coolant getting into the oil?

Victor

1985 KTM 250
1965  Vespa 150
[/quote]

Victor

1985 KTM 250
1965  Vespa 150

[DKWRACER]

There should be an oil seal on the inside of the outer case, behind the impeller shaft. Also too, that case is magnesium which is prone to pitting from e/g type coolant, so check for serious pitting. some of the hex allen screws that mount the outer impeller cover (depending on length) may have protruded past the bottom point penetrating into the oil cavity, h20 can leak past those screws. adios,, Tom Brosius

[vicbikeparma]

cover has corrosion and a hole about a 1 MM, can you patch that up or do I need to look for another cover?

Victor

1985 KTM 250
1965  Vespa 150

[Daniel P. McEntee]

Bead blast it real well, then weld up the hole, or patch with JB-Weld. JB-Weld will be the easiest and should hold up, especially if you can put a layer on both sides.
  Type at you later,
   Dan McEntee

[Bill Campbell]

Have an 85 250 that had the seal area corroded away. I just used Devcon on all the areas that needed attention. This lasted for about 3 or 4 years using an inhibitor in the coolant. Devcon seemed to get spongey and started to leak. I now have an aluminium clutch cover. While we are on these bikes I now have a weeping head gasket once it warms up. I will replace the gasket soon. Any ideas as to what may have happened. Bike seem to run ok but got a little ratty after 2 four lap races.
Cheers Bill