Wet Sumping of AMC Singles

poplargreg · Post by **poplargreg** » Sun Jun 11, 2017 3:31 pm

Has anyone considered putting a drain tap in the drive side of the crankcase below the level of the breather pipe? When the oil is drained, a little would be left to "prime the pump". If the bike was ridden with it left open, no damage would be done.

I used to have a Swiss Simar rotavator with a crank case drain tap. Being a two strpke, it wouldn't start with petroil present.

Mick D · Post by **Mick D** » Sun Jun 11, 2017 4:36 pm

Hi

The tap thought is OK but if it's left open it would be an open line into the crank case and would negate the function of the breather - it would allow air / rain / dust to enter the crank case.

Regards Mick

poplargreg · Post by **poplargreg** » Sun Jun 11, 2017 4:42 pm

Mick D wrote:Hi

The tap thought is OK but if it's left open it would be an open line into the crank case and would negate the function of the breather - it would allow air / rain / dust to enter the crank case.

Regards Mick

You'd probably get an oily foot too. That might remind you to close it. A lot less serious than forgetting to open a tap in the oil feed!

Post by **Harry44** » Sun Jun 11, 2017 5:06 pm

Why fit a tap when the crankcase already has a drain plug ?

poplargreg · Post by **poplargreg** » Sun Jun 11, 2017 5:28 pm

Harry44 wrote:Why fit a tap when the crankcase already has a drain plug ?

Convenience, no risk pf stripped thread, some oil remaining in sump.

spookefoote1956 · Post by **spookefoote1956** » Wed Jun 14, 2017 5:20 pm

I'm sure I read somewhere recently about a tap which connects to the ignition so that it drains but you can't start the bike with the tap open.

JimFitz · Post by **JimFitz** » Wed Jun 14, 2017 9:44 pm

Sold by Andrew Dove in the Jampot mag adverts but it is an oil tap not a drain valve.

Jim

neil cairns · Post by **neil cairns** » Wed Jun 21, 2017 2:12 pm

Just a comment, dave16mct notes we twin owners would faint at such a long time for oil to drain-down. My '59 G12 will empty its tank into the sump in about four days!!!! (and I fitted a good s/h pump as it was worse before.) Both my 18S do not wet-sump at all.

clive · Post by **clive** » Thu Jun 22, 2017 2:13 pm

my combo (model 18) wet sumped after only 8 years standing. bit poor I thought

Janet · Post by **Janet** » Thu Jun 22, 2017 2:34 pm

clive wrote:my combo (model 18) wet sumped after only 8 years standing. bit poor I thought

Did you kick it over regularly in the meantime or how do you know it hadn't sumped after 7 years?

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Wet Sumping of AMC Singles

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