Water in oil (V7 II) |
Post Reply | Page <1234> |
Author | |
Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
Post Options
Thanks(0)
|
That oil seperation system has been used on most of the recent models, well since the lat 80s anyway. Never had oil in the sump on my SPIII. Earlier small blocks had the oil seperation done as a part of the air box. All the airboxes/filters on the small blocks have been a pain to service.
|
|
Brian.
Better 5 minutes late in this world than years early in the next. |
|
Andyb
Senior Member Joined: 02 Jul 2016 Location: Nottinghamshire Status: Offline Points: 602 |
Post Options
Thanks(0)
|
Have a look at PCV ENHANCERS on ebay or google - these are simple containers to renove the water vapour
Andyb
|
|
c13pep
Senior Member Joined: 31 Aug 2017 Location: Doncaster Status: Offline Points: 2110 |
Post Options
Thanks(0)
|
[QUOTE=motopete] We can't say the weather's been cold and damp lately can we? And the V7 certainly hasn't been standing idle. So today I popped the rear sump plug out expecting to find clean oil, but instead a steady stream of clear water came out again... Only 2,000 miles since I last drained it. The amount I removed was enough to drop the dipstick level from max to min, which probaly explains why the engine doesn't appear to use any oil, the level keeps getting topped-up with water
The worry would be not only the amount of water but where has the oil gone! CHRIS |
|
you can`t have any fun in a straight line
Monza Honda CB77 project |
|
Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
Post Options
Thanks(0)
|
Still don't believe that that much water can be got from just "condensation". Where is the intake for the air filter? |
|
"Chicken nuggets don't dance on a Tuesday."
|
|
V7Chris
Senior Member Joined: 13 May 2017 Location: Powys Status: Offline Points: 1882 |
Post Options
Thanks(0)
|
The last engine I had that was this bad for crankcase ventilation was a 1974 Hillman Avenger... That made mayo quicker than Heinz. Pete. Hoho. Yes but Hillman had overcome that problem by 1978, because all the 1974 Avengers were in the scrapyard by then! Car makers in the 70s are a bit like surgeons, they buried their mistakes...
|
|
motopete
Senior Member Joined: 18 Aug 2015 Location: Notts Status: Offline Points: 532 |
Post Options
Thanks(0)
|
I reckon I've sussed it, at least in theory. I need to try a few things to prove it:
My favourite "solution" at the mo is to run the drain pipe from the oil seperator to atmosphere and catch the drips in a small catch bottle. I'm thinking this would provide another route for the crakcase to breathe, considering the normal path via the airbox is (I think) clogged, and it would stop any condensed water entering the sump. What do folks think? Sound plausible?? Apologies for the long ramblings of a madman... Pete.
|
|
Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
Post Options
Thanks(0)
|
Interesting - just a thought, my LM's PO had put a catch bottle on (a small 250ml used plastic oil bottle on a bracket) however the "chuffing" from the vent hose simply blew the contents out everywhere. Was never any drips in it so ended up taking it off, the oil was being spread on the underneath of the gearbox already anyway so no difference. |
|
"Chicken nuggets don't dance on a Tuesday."
|
|
Andyb
Senior Member Joined: 02 Jul 2016 Location: Nottinghamshire Status: Offline Points: 602 |
Post Options
Thanks(0)
|
Why not remove the foam? What function does it have?
AndyB
|
|
motopete
Senior Member Joined: 18 Aug 2015 Location: Notts Status: Offline Points: 532 |
Post Options
Thanks(0)
|
I can only think of two reasons for the foam:
1. Trap
any particles in the breather system and stop them being drawn into the engine.
Having said that the breather pipe feeding the airbox is nice and clean, just a
bit oily as you’d expect. 2. Flame
trap in case the engine spits back through the inlet valve, to prevent ignition
of fumes in the breather system. On balance I’m tempted to remove
the foam. It wouldn’t be too difficult to add an external filter in-line with
the breather pipe, at least that’d be easy to service. Doesn't look at all straightforward to get the airbox out or apart though... The weird thing is, despite all
these niggles and imperfections I still love the bike! It has real character. |
|
Adam
Senior Member Joined: 19 Jul 2017 Location: UK Status: Offline Points: 127 |
Post Options
Thanks(0)
|
The worry got to me, so I drained a bit of oil from the sump,
..... aaaaand relax, no water. I guess your model might have different plumbing to my 2009. I have used the bike over winter to keep the battery etc. healthy. Hope you find a solution.
|
|
motopete
Senior Member Joined: 18 Aug 2015 Location: Notts Status: Offline Points: 532 |
Post Options
Thanks(0)
|
Googling around Adam I get the impression the problem is far more prevalent on later single TB V7's. Yours being 2009 will be twin TB I guess.
Not sure how the new V7 III fares? I know they modified the breather set up compared to V7 II. |
|
motopete
Senior Member Joined: 18 Aug 2015 Location: Notts Status: Offline Points: 532 |
Post Options
Thanks(0)
|
Thought I'd share an update on my nice clean oil, with not a trace of oil in the sump after 2 months continuous riding
I've disconnected the return pipe from the oil separater and fed it into a catch tube (length of copper tube with a drain at one end). Result The sump's remained squeaky clean, so have the rocker covers. The catch tube collects a small amount of water plus a bit of oil each week (more water than oil). Over the last 2 months I've drained around 100cc of water, I know because I've been saving every drop. Now my engine actually uses some oil - as I'd expect - previously it never seemed to use much oil because the crappy breather system was dumping enough water into the sump to offset the oil burnt by the engine. Finally, I see the oil return pipe to the sump has been deleted on the V7 III.... I wonder why? |
|
oldlegs
Senior Member Joined: 12 Sep 2015 Location: south yorkshire Status: Offline Points: 226 |
Post Options
Thanks(0)
|
With not a trace of oil in the sump? only kidding we know what you mean.
Have you blocked the other end where the return pipe used to fit. Any chance of a pic. Steve. |
|
Current: Beta Motard M4. Beta Motard tourer. Beta Super Motard. Beta Alp.
|
|
V7Chris
Senior Member Joined: 13 May 2017 Location: Powys Status: Offline Points: 1882 |
Post Options
Thanks(0)
|
+1 please
|
|
Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
Post Options
Thanks(0)
|
It's fairly clear that the oil separator in the frame tube doen't get hot enough to stop the water vapour condensing, so it can end up in the sump. The older V50 etc. used a plastic separator which was part of the air box, so probably didn't work as a condensor.
|
|
Brian.
Better 5 minutes late in this world than years early in the next. |
|
Post Reply | Page <1234> |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |