Running In - Oil Drips

If you're having a problem with your scoot, drop us a line!

Moderator: Tuna Cowboy

Running In - Oil Drips

Postby rollertom » Mon Jun 16, 2014 5:04 pm

I got the Rally back on the road and I am running her in (following the instructions in the sticky post).

I noticed a few oil drips underneath the motor after longer rides - one around the rear oil plug and one around the clutch cable inner/outer. Is this normal because of the running in and sealing period or do I have a gasket problem?
rollertom
 
Posts: 82
Joined: Tue Jul 21, 2009 7:55 pm

Re: Running In - Oil Drips

Postby spiderwebb » Mon Jun 16, 2014 5:09 pm

after a rebuild you should check all the nuts and bolt for spec
they loosen a little after a new build and need to be tightened up one more time

If I was you I would spend a hr checking them all while also cleaning the engine of the oil drips
that way if the drip manifests again you can track it to the source

good job

Top Tip:
- Use some Ultra Copper High Temps Gasket goo on the exhaust threads as a "lock tight"

works very well
I use this stuff all over the top end and exhaust slip joints
User avatar
spiderwebb
 
Posts: 2661
Joined: Fri May 25, 2007 3:15 pm
Location: Eugene, OR

Re: Running In - Oil Drips

Postby rollertom » Mon Jun 16, 2014 5:23 pm

OK, on the list for the weekend. Any recommendations for cleaning the engine - car soap or something else?
rollertom
 
Posts: 82
Joined: Tue Jul 21, 2009 7:55 pm

Re: Running In - Oil Drips

Postby spiderwebb » Mon Jun 16, 2014 6:12 pm

simple green
is biodegradable and works very well

if you using water afterwards do put plastic bags over all electronics
- CDI, reg, ..ect
User avatar
spiderwebb
 
Posts: 2661
Joined: Fri May 25, 2007 3:15 pm
Location: Eugene, OR

Re: Running In - Oil Drips

Postby joe » Wed Jun 18, 2014 1:09 pm

drips are not normal. smell the oil to determine if it's crankcase oil or 2% oil/gas mix. this will tell you where to look.

don't automatically thing the drip is from your oil plug. it's also the lowest point of the motor, so look above it to determine if it's from another location. if it is the plug bolt. use the proper red gasket and be careful not to over tighten.

when tracing the leak, pop off your cylinder cooling shroud if needed.

Be care cleaning your motor around the electrics. typical foam cleaners can hard wiring and CDIs. I find simple green, hard bristle brush and cloth rags work well
____________________________________
Friends Don't Let Friends Ride Tupperware
User avatar
joe
Site Admin
 
Posts: 8239
Joined: Tue Apr 25, 2006 10:06 pm
Location: Sunny Eugene, Oregon

Re: Running In - Oil Drips

Postby spiderwebb » Wed Jun 18, 2014 2:31 pm

oil can come out the case breather

oil and gas can flow out the carb box

and the other top end / case gasket leaks
User avatar
spiderwebb
 
Posts: 2661
Joined: Fri May 25, 2007 3:15 pm
Location: Eugene, OR

Re: Running In - Oil Drips

Postby rollertom » Mon Jun 23, 2014 5:04 pm

I tightened all bolts and nuts (the exhaust bolt was a bit lose - stock exhaust), cleaned the engine, went on a ~20miles run, and spotted oil again. The oil doesn't smell like gas and is yellow-brownish as my gear oil (stroke oil is blue-greenish).

There was oil on top of the engine # (up arrow), running down, and covering the inner cable end (down arrow).

Image

The drip on the gound was coming from the area between case and cylinder (red arrow).

Image

Left-hand side of case, carburetor, cyclinder, cylinder head were all dry.

Anything other than the cylinder gasket between case and cylinder?

Here is a nicer picture.

Image
rollertom
 
Posts: 82
Joined: Tue Jul 21, 2009 7:55 pm

Re: Running In - Oil Drips

Postby spiderwebb » Mon Jun 23, 2014 5:46 pm

oil and drips are pushed around with the wind / air flow...

looks like a drip via the exhaust flange or base or cylinder head dripped down

happens

Did you check all the top end just for spec...??
Do you use a torque wrench on the head nuts...??

if the drip returns after you clean once again after checking cylinder head nuts for spec then you should be able to track it down right to where is is seeping... remove all the tin to have a good look around.

over all nice ride
:)
User avatar
spiderwebb
 
Posts: 2661
Joined: Fri May 25, 2007 3:15 pm
Location: Eugene, OR

Re: Running In - Oil Drips

Postby spiderwebb » Mon Jun 23, 2014 5:49 pm

and

get a tube of Ultra Copper High Temp goo

use this on the slip joint of the exhaust
helps a lot

I use it on all sealing surfaces even with gaskets
works great

you can also use this goo as a type of "lock tight" on the exhaust nuts
put it on the threads after the flat and lock washer but before the nut
top tip

always check nuts and what nots after a few 100 miles after a install or rebuild

ww
User avatar
spiderwebb
 
Posts: 2661
Joined: Fri May 25, 2007 3:15 pm
Location: Eugene, OR

Re: Running In - Oil Drips

Postby rollertom » Mon Jun 23, 2014 9:25 pm

I got the copper maximum temperature silicon gasket maker. I haven't used it yet.

I used my regular ratchets and sockets. I was worried about overtightening but I guess I should be worried about undertightening it. Would this one with 5-80 work
http://www.harborfreight.com/3-8-eighth ... h-807.html
and are regular (deep sockets) fine?

"Top end just for spec"? I didn't remove anything from the engine (cylinder head, cylinder).
rollertom
 
Posts: 82
Joined: Tue Jul 21, 2009 7:55 pm

Re: Running In - Oil Drips

Postby spiderwebb » Tue Jun 24, 2014 9:00 am

I have that torque wrench from lower specs and a larger one for higher specs
should be fine for you

over tightening is worse than under tightening = stripping the case threads sucks
getting nuts and bolts to spec is nice and makes you feel that you taking care of you scoot right

any sockets you have are fine
metric
you might need a socket extender once in a while if at all and deep socket are not all that important

that oil drip could be doing from the top end = up near head or at the base
both of these areas can use the ultra copper high temp goo

and when you head is off check that is is perfectly flat:
- one piece of counter top material (granite or glass), fine sand paper, a little oil and slide head around in a figures 8 motion until the sealing surface is 100% perfect

then rebuild
evenly getting nuts to spec = all up to 8 lbs evenly, then up to 10 and repeat up to spec evenly in a star pattern

good job
User avatar
spiderwebb
 
Posts: 2661
Joined: Fri May 25, 2007 3:15 pm
Location: Eugene, OR

Re: Running In - Oil Drips

Postby rollertom » Tue Jun 24, 2014 5:06 pm

I got the silicone gasket maker and ordered the torque wrench. I hope that will do it. I will know more on Thursday.

I would like to avoid taking off the cylinder head. I am also not sure I would get a replacement cylinder gasket and nuts before Friday.

There is a rally this weekend (NYC Block Party) and I would like to collect the miles and views of the rides... 8)
rollertom
 
Posts: 82
Joined: Tue Jul 21, 2009 7:55 pm

Re: Running In - Oil Drips

Postby spiderwebb » Tue Jun 24, 2014 5:16 pm

rollertom wrote:I would like to avoid taking off the cylinder head. I am also not sure I would get a replacement cylinder gasket and nuts before Friday.

There is a rally this weekend (NYC Block Party) and I would like to collect the miles and views of the rides... 8)

ok

if I was you I wouldn't take the head off either unless the drip was way bad
what you should do is this:
- remove cooling head tin
- check that the 4 main head nuts are @ spec
- don't loosen them at all = just tighten the loose ones up (most likely the bottom 2 nuts)
- clean up top end and look for where that drip came from
- tin back on
- ride and have fun

if you don't check then murphys law states that your going to blow a head seal on this weekends ride or worse

be safe

this only takes a hr
User avatar
spiderwebb
 
Posts: 2661
Joined: Fri May 25, 2007 3:15 pm
Location: Eugene, OR

Re: Running In - Oil Drips

Postby rollertom » Tue Jun 24, 2014 6:00 pm

Just to clarify... "Top end" is cylinder head and cylinder? "Cooling tin" is the plastic cooling shroud?
rollertom
 
Posts: 82
Joined: Tue Jul 21, 2009 7:55 pm

Re: Running In - Oil Drips

Postby spiderwebb » Tue Jun 24, 2014 6:06 pm

rollertom wrote:Just to clarify... "Top end" is cylinder head and cylinder? "Cooling tin" is the plastic cooling shroud?


yuuuuuuup
remove plastic cooling shroud
tighten up the 4 head nuts while checking it for drips
clean up
put it all back together

ride knowing you don't have top end air leak
8) 8)
User avatar
spiderwebb
 
Posts: 2661
Joined: Fri May 25, 2007 3:15 pm
Location: Eugene, OR

Next

Return to Scooter Workshop

Who is online

Users browsing this forum: No registered users and 1 guest

cron