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  #1 (permalink)  
Old 07-29-2017, 08:55 PM
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more oil flow problems

I'm thinking I have a venting problem more then an over fill. I've had the cap blow out twice along with maybe 6-8oz of oil. The oil looked a little foamy to me. The bikes in the shop right now having a little wiring problems taken care of (I can't wire worth a shit)

When we're talking vent line, is this to vent the engine cases, the oil tank, or both? It seems to me the tank isn't venting properly.

I'd like to read what you guys think.

Here's a link to some more info and pictures

New bobber needs more oil

Thank you

fish
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  #2 (permalink)  
Old 07-30-2017, 07:20 AM
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Quote:
Originally Posted by golfish View Post
I'm thinking I have a venting problem more then an over fill. I've had the cap blow out twice along with maybe 6-8oz of oil. The oil looked a little foamy to me. The bikes in the shop right now having a little wiring problems taken care of (I can't wire worth a shit)

When we're talking vent line, is this to vent the engine cases, the oil tank, or both? It seems to me the tank isn't venting properly.

I'd like to read what you guys think.

Here's a link to some more info and pictures

New bobber needs more oil

Thank you

fish
Make sure the routing of oil lines is correct
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  #3 (permalink)  
Old 07-30-2017, 07:28 AM
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Always liked that bike did you buy it from chassis design? Check all the basic with the oil issue, make sure have the right filter on there and the lines are going the right way
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  #4 (permalink)  
Old 07-30-2017, 12:22 PM
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Quote:
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Always liked that bike did you buy it from chassis design? Check all the basic with the oil issue, make sure have the right filter on there and the lines are going the right way
Thanks guys, I have it in a shop right now and I think they ran out of talent.
Chassis Design Co was sold last month. I talked to the new owner today. He doesn't know anything about it but he's going to pass my concern on to the old owner.
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Old 07-30-2017, 12:53 PM
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Sorry , double post
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  #6 (permalink)  
Old 07-30-2017, 02:19 PM
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You have two vents that should be a concern...First is your oil tank vent.....This vent runs up to the very top of your oil tank, and stops maybe 1/8 inch from the top along with your return line.
which is the same,,,so make sure your oil tank is not so full as to slosh into the vent line.....and make sure it is not clogged, and that your hoses
are correct..

Next is your case vent, there are two which are in the back of your cases next to your oil pump...you should have one of these open...you need a fitting......connect a hose and let it run to the ground, with a filter on it.......These engines breath by a breathing system....umbrella valves....through the heads...but sometime are not efficient....is why you need the cases open too.

Check Stein's diagram and make sure your oil hoses are run properly..and that you can blow through your vent hose..
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Last edited by Shovel52; 07-30-2017 at 05:36 PM..
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Old 08-01-2017, 02:46 PM
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Hey Guys, so I told the shop the bike was at to wrap up what they are doing so I can get the bike back home. They didn't know why the cap was blowing out other then there was too much oil. If you look at the pics below you can see the oil tank and where it was cut out for the seat shock. An already small oil tank was made smaller. I'd be shocked if there was 2qts of oil in the system.
My next move is to add the oil cooler (with temp gauge) and see what I have. I rode it home about 5 miles in 105 degree temp and the cap didn't pop out.

The oil lines are correct and blown clear..

Any ideas whats going on? If the tanks too small I will have another made..


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Last edited by golfish; 08-02-2017 at 05:35 PM..
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Old 08-01-2017, 06:19 PM
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Any way you can measure your oil temp? so you can determine if you are over heating in the tank...as apposed to maybe excess pressure in the cases? Did you say you had your cases vented?
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  #9 (permalink)  
Old 08-02-2017, 05:47 PM
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Ok, I figured out the problem. If you look at my 3rd grade drawing you can see what the problem is, remember, that big cut out is for the seat shock. The fill and drain side of the tank isn't venting unless the level is below the cut away. I've been beating my head over this for days now

Looks like I'll have to remove the tank and have another bung put in on that side, then have it powder coated.

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Old 08-02-2017, 06:47 PM
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See what you mean..that side of the tank would be completely shut off, no wonder..good thinking..got to look at it for a while though to see it..
I wonder if you could make a vent using the drain and a piece of tubing that runs up to the top? just screw your fitting in..
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Last edited by Shovel52; 08-02-2017 at 06:54 PM..
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Old 08-02-2017, 09:10 PM
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I have a couple ideas I'm going to try. Thanks for all your help 52
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Old 08-03-2017, 01:41 PM
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Quote:
Originally Posted by Shovel52 View Post
Did you say you had your cases vented?
Shovel52, I'm not really sure what to look for on this. It seems to me that its "sumping" . When the bike sits for awhile the oil tank goes way down, then when I fire it up the tank fills and blows out the cap. It doesn't blow out like an evo engine would.

I'm not familiar with the twin cam engine, but I am learning. I asked the shop mechanic about the oil pump check balls and springs, he knew less that I did.
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Old 08-03-2017, 03:58 PM
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I just called another local shop, he suggested it was a bad piston ring. Wouldn't it be smoking and running like crap if it was rings?
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Old 08-03-2017, 04:07 PM
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fix your check valve issue in the oil pump before worrying about the other mess. you'll probably have to drain the crankcase of oil before starting.
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Old 08-03-2017, 04:14 PM
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Is the ball leaking or is it pressure blowing the oil past the ball when you turn the bike off? I would remove one of your case vent plugs and see if it relieves those symptoms...If it still does it
then I would try venting your oil tank better..

I don't know how big your oil tank drain plug is...Drill a hole through it, run a piece of copper tubing through that reaches the top of the tank ..solder it up..put a slight flare on the end and clamp your hose on ..shouldn't take more than an hour..If it still does it then you may have oil pump issues. Piston ring sounds possible..
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