M8 problems

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May 27, 2017 | 09:22 AM

#581

Max Headflow

Seasoned HDF Member

Joined: Dec 2005

Posts: 19,925

Likes: 8,027

From: poway

Quote:

Originally Posted by splattttttt

Don't understand why the MoCo would put a standered round o ring on there instead of an x or square ring.
seems to me this is an area where pressure is high enough to justify a more durable application.
On the piston squitrs... I the o ring is rolled, you may be loosing the pressure necessary for oil to reach to the top of the engine.
Not a wrencher here, but sounds logical to me

On the oil pump scavenge ring. I would suspect that finding an x ring in Viton would be hard. Also the way it's used, it needs some compression to hold it in place.. Also it during assembly, a stiffer O ring is needed to keep the pump spigot centered in the hole. I suspect that X rings work better in lower compression locations. Early TC pumps the spigot was as cast. The stated to machine them some time around 2001. The O ring fit is tight and needs some lube, My bet that it was missed.

If the cooling jets were loose, that would be the main contributor.. I agree about less oil to the top end but with it sumping, and it blowing oil our the breathers, there was plenty..

They should have checked rocker bearings/ shafts and pushrod ball ends tho..

May 30, 2017 | 12:45 PM

#582

ChromeSporty

Advanced

Joined: Aug 2016

Posts: 85

Likes: 21

From: King Ontario

Quote:

Originally Posted by rjjj629

Well, I'm at 6000 miles now and I think it's eating oil somewhere. I did the 5K service at 5022 miles. I put exactly 4.2 qts in and the dipstick was reading right at 8/10s full when hot on jiffy stand.

After today's ride its reading just a hair below 6/10s full when hot on jiffy stand.

I added 7 ozs and it brought it back up to 8/10s.

I'm using Mobil 1 vtwin 20w50. There are no leaks or drips on the garage floor and the exhaust doesn't smoke.

I took the air filter out and sure enough there's been some oil in there thru the breathers but not very much. There was some oil film on the inside of the throttle body but not a full drop to be seen.

So, is it normal to lose/use/burn 7 ozs of oil in a thousand miles?

I would say not. My 2006 1200XL Sporty only uses a couple of ounces between 5000 mile oil changes. The M8, one would think, should be better than my 11 year old bike in this regard.

May 30, 2017 | 12:53 PM

#583

splattttttt

Ultimate HDF Member

Joined: Jul 2014

Posts: 5,649

Likes: 430

From: MASS_hole

My old sporty never burned any.
my wifes sporty neither and stays cleaner longer.
Big twins do a job on oil. The M8 uses many passages where oil can stay in and not drain into the sump.
I for one would keep the tank only at half fool when hot and not more.

May 30, 2017 | 03:23 PM

#584

smitty901

Seasoned HDF Member

Joined: Feb 2008

Posts: 23,001

Likes: 11,441

Not a big issue.
Oil pressure sensor failed while on vacation. 4000 miles pulled into Pigeon Forge HD .
They took in in the shop right away tested it , replaced sensor . I signed warranty paper work and back on the road.

Jun 7, 2017 | 10:40 AM

#585

N3LsToNe

Intermediate

Joined: Feb 2013

Posts: 31

Likes: 3

From: Fridley

Jesus 60 pages of oil issues makes me want to wait a few years

Jun 7, 2017 | 11:55 AM

#586

texaswiz

Banned

Joined: Jul 2008

Posts: 1,036

Likes: 67

Quote:

Originally Posted by N3LsToNe

Jesus 60 pages of oil issues makes me want to wait a few years

What?? You got something against all this drama? And...it is FREE.

Jun 7, 2017 | 05:46 PM

#587

Punjabi Rider

Grand HDF Member

Joined: Sep 2009

Posts: 3,808

Likes: 285

From: Green Country Oklahoma

Very expensive problem traded my 15 Limited with 35K miles on it for CVO limited brought it home and Mama said I made her 15 limited low ugly well turned around and brought her a very prettier then my CVO a Candy Cobalt and Indigo Ink CVO Streetglide. Now she's happy and I've happy life.