Oil fouling

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King
Posts: 387
Joined: Fri Apr 02, 2004 5:05 pm

Oil fouling

#1

Post by King » Mon Sep 12, 2005 12:26 pm

Hi All

My plugs seem to be oil fouling. Even after a long run they are have a black coating that is slightly oily. Bike starts a bit hard but runs great. I had a friend follow me for a few miles and he saw no white smoke even with hard acceleration and deceleration. I haven't done a compression test but it seems to be OK as on the compression stroke it will almost take my 200 some pounds on the kicker.

Bike is a 51FL with STD heads and about 2000 miles on the heads and a top end job. Bendix carb and Andrews #1 cam. Running the mid range Evo spark plugs.

What is a good diagnostic path here? Could I be running the wrong plug?

Thanks

King



63panhead

Re: Oil fouling

#2

Post by 63panhead » Mon Sep 12, 2005 10:10 pm

King,
I am/was having the same problem. Make sure that you're crankcase vent is not plugged. Mine was and I was burning oil and leaking oil at the cylinder bases. The oil pressure was just way too high. My plugs are the same you described and I have not changed them yet. The first time I did change them, my pan was first kick every time. My bike was also sluggish before I cleared the clog.

King
Posts: 387
Joined: Fri Apr 02, 2004 5:05 pm

Re: Oil fouling

#3

Post by King » Tue Sep 13, 2005 1:20 pm

Hi 63panhead

I need to check this out. I've noticed a bit less oil drainage from the primary case, so?? Where was your blockage?

Thanks

King

63panhead

Re: Oil fouling

#4

Post by 63panhead » Tue Sep 13, 2005 11:49 pm

There was a seal installed on the inside of the breather shaft. I removed that. My chain oiler is turned off since I have a primary belt. Here's a link to my thread with pictures:

viewtopic.php?f=61&t=2275

King
Posts: 387
Joined: Fri Apr 02, 2004 5:05 pm

Re: Oil fouling

#5

Post by King » Wed Sep 14, 2005 12:01 pm

63panhead

Thanks for the thread reference. I doubt I have a similar problem as I've had the bike for over 30 years. But i just had some work done to install the new cam and possibly the breather gear got put back a tooth or two off. I noticed a bit of oil leaking out of the pan covers also. So i think I need to check the gear case.

King

King
Posts: 387
Joined: Fri Apr 02, 2004 5:05 pm

Re: Oil fouling

#6

Post by King » Thu Sep 15, 2005 3:59 pm

Checked the breather and its chuffing away like an old steam engine, so definately not blocked. I guess I'll proceed to a compression test. Any other Ideas?

King

Cotten
Posts: 6911
Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois

Re: Oil fouling

#7

Post by Cotten » Fri Sep 16, 2005 1:52 am

To try to determine if the plugs are oil coated or gas sooted:

Put a gentle heatlamp on them for a while. If they dry to soot, then it's not oil. If it stays greasy, then it can only be oil.

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