Breather Timing....

[olpigiron]

This May Have Been Discussed Before, However Here it Goes....
    If The Timing Of The Oil Pump Breather Is Out of Whack,
         Will The Engine Smoke. And If So, How Much?
Thanks.....

[Lew]

It's my understanding that there will be incomplete oil scavenging and increased pressure loading on the piston rings.  This excess oil and increase in pressure can cause oil to work into the combustion chamber.  Most likely varying engine temps, oil viscosity, and RPM's will cause differing oil consumption symptoms.   

Lew 

[olpigiron]

Thanks Lewy, I Was Afraid That Might Be What Is Going On.....

[saltcaveminer]

you might check compression for ring seal.unless the camcover was pulled and the gears messed with the timing should the sameSalty

[olpigiron]

Salty;
                    I Just Did The Top End This Winter, New Guides,New Valves, Net Seats,
                 New Pistons,New Bore and Hone, And New Rings. All Clearances Were In Spec.
   Rebuilt The Oil Pump.... The Engine Runs Excellent, Except For Some Smoking. However, Not Wanting To
        Mention Any Names, "Jack Daniels" Comes To Mind.... Although Ashamed, I May Have Used
                             Too Much "Jack" and The Wrong Mark On The Flywheel....

thank U All.....

[olpigiron]

I Have The Ol' Girl Open, and It Looks Like, The Timing Breather Notch Is Aligned With the Pump Mark
When "Single Dot" or Front Cylinder TDC On Fly Wheel Is In The Window...

I've Looked @ All My Manuals And As Far  As I Can Tell, I Need to Use The "Single Line" 20 Degs.
ATDC Or Static Timing Mark" On The Fly Wheel.

If This Doesn't Make Any Cents Sorry......

Would Just Like To Know Which Flywheel Marks To Use...

This Is A '73 1000cc

Thanks...

[olpigiron]

I Went With The Single Line Mark.....
We'll See How It Goes.....

Thanks....

[Coff 06]

When my 72 XLCH jumped,it pumped oil out the vent tube onto the rear tire,no smoke out of the exhaust as I remember.  Coff 06

[olpigiron]

Got The Ol'gal Back Together Today....
Well.... I Did As I Said In A Previous Post. 
I Set The Breather Timing With The Single Line On The Flywheel....
Fired The OPOS Up....    It Ran Like A Swiss Watch... No Smoke....
Read The Book  Read The Book  .....
I Need To Read The Intent,, Not What's Said......
Hope This Helps Someone In The Future....