Two oil drain plugs? : V-Twin Forum: Harley Davidson Forums
» Sponsors

» Insurance
Go Back   V-Twin Forum : Harley-Davidson Motorcycle Forums > Technical Discussion Forums > Twin-Cam 88" Engine Technical Discussion
New User? Register Forgot Password

Reply
 
LinkBack Thread Tools Display Modes
Old 06-04-2009, 05:45 PM   #1 (permalink)
IronButt
 
Join Date: May 2009
Location: Texas
Posts: 494
2000FiveOh wants to know where he is and how he got here
Two oil drain plugs?

A friend of mine was changing his oil and asked me why there are two drain plugs for the oil. I looked in my manual but it didn't explain much. He said one looks like a drain plug and one was an allen head plug. He said he drained the oil via the pipe plug. Anyone know the purpose of two plugs to drain the oil? Does it matter which plug is used? Both are on the left side pointing forward about an inch and a half apart. I think he probably drained from the wrong plug (pipe plug). My question is does it matter? Any feedback on this?
__________________
2000 Road King, 96", K&N AC, Andrews 26G cams, Pre-EPA SE Slip Ons, 3:37 Primary gearing, EFI to carb, 105,000 and still rolling
2000FiveOh is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-04-2009, 05:57 PM   #2 (permalink)
Flying low
 
DBotkin's Avatar
 
Join Date: Jul 2006
Location: Omaha, NE
Posts: 812
DBotkin wants to know Dino or Syn?
The engine oil drain is a hex head bolt.

I don't have my service manual handy and haven't drained it recently, but I think the transmission oil drain is an Allen plug. Either that, or he found the sump drain. Might be useful to know what kind of bike your friend has.
__________________
100th Anniversary Ultra Classic
95" - Andrews TW26a - SE slip-ons
'55 Vespa VL1 chase vehicle, 150 CC of screaming 2-stroke madness!






Free, personalized travel maps at mytriplogs.com



DBotkin is offline   Reply With Quote
Old 06-04-2009, 06:07 PM   #3 (permalink)
Banned
 
Join Date: Aug 2004
Location: Arizona
Posts: 1,376
doc ock wants to know Dino or Syn?
I used the pipe plug for my oil temp gage. The oil drain plug is the the other bolt with a hex head and also magnetic. Don't think it matters on draining but the pipe plug was in the instructions when adding the oil temp gage.
doc ock is offline   Reply With Quote
Old 06-05-2009, 01:20 AM   #4 (permalink)
IronButt
 
Join Date: May 2009
Location: Texas
Posts: 494
2000FiveOh wants to know where he is and how he got here
Doc: Thanks, that's a good idea for a temp guage take off point.

I'm still curious though, why two points so close together that both drain the oil.

Maybe Doc is on to something. Is the 2nd plug for exactly that reason or is it just another casting point in the case similar to the other two casted in the front of the block?
__________________
2000 Road King, 96", K&N AC, Andrews 26G cams, Pre-EPA SE Slip Ons, 3:37 Primary gearing, EFI to carb, 105,000 and still rolling
2000FiveOh is offline   Reply With Quote
Old 06-05-2009, 01:23 AM   #5 (permalink)
IronButt
 
Join Date: May 2009
Location: Texas
Posts: 494
2000FiveOh wants to know where he is and how he got here
Quote:
Originally Posted by DBotkin View Post
The engine oil drain is a hex head bolt.

I don't have my service manual handy and haven't drained it recently, but I think the transmission oil drain is an Allen plug. Either that, or he found the sump drain. Might be useful to know what kind of bike your friend has.
What sump drain are you referring to? Can you explain what you mean by "sump drain"? Why would someone need a sump drain point which is located an inch from the oil drain plug? Wouldn't it,being that close, drain the same oil? If you can fully explain your meaning and the purpose of a "sump drain" we would appreciate it.
__________________
2000 Road King, 96", K&N AC, Andrews 26G cams, Pre-EPA SE Slip Ons, 3:37 Primary gearing, EFI to carb, 105,000 and still rolling
2000FiveOh is offline   Reply With Quote
Old 06-05-2009, 06:55 AM   #6 (permalink)
IronButt
 
Join Date: Mar 2007
Location: Texas
Posts: 615
Texas Tom wants to know Dino or Syn?
The sump drain is a large allen in the case not oil pan,it is used to drain the case too check for a condition called sumping where oil is not circulating but winds up in the case,on a warm engine there should be very little oil in there but sometimes on a cold engine there can be quite a bit especially on softtails ,the oil tank is high and gravity takes over.sometimes on this board you will read where someone tried to change there oil and only a few ounces came out,yet oil was still full,guess where they were . The pipe plug you refer to on touring bikes is in the oil pan as is the drain,the drain has a allen and hex both ,pipe plug is allen only.Im at work so don`t have manual in front of me HD calls the pipe plug something else aux access or some crap like that anyway that is where I put the sensor for my oil temp gauge.If your friend used pipe plug to drain thats ok just put something on it so it don`t leak,it doesn`t have an o-ring..Tom..
Texas Tom is offline   Reply With Quote
Old 06-05-2009, 02:00 PM   #7 (permalink)
Lifetime Premium
 
Sturge's Avatar
 
Join Date: May 2004
Location: CT
Posts: 699
Sturge wants to know Dino or Syn?
Thumbs up

Quote:
Originally Posted by Texas Tom View Post
The sump drain is a large allen in the case not oil pan,it is used to drain the case too check for a condition called sumping where oil is not circulating but winds up in the case,on a warm engine there should be very little oil in there but sometimes on a cold engine there can be quite a bit especially on softtails ,the oil tank is high and gravity takes over.sometimes on this board you will read where someone tried to change there oil and only a few ounces came out,yet oil was still full,guess where they were . The pipe plug you refer to on touring bikes is in the oil pan as is the drain,the drain has a allen and hex both ,pipe plug is allen only.Im at work so don`t have manual in front of me HD calls the pipe plug something else aux access or some crap like that anyway that is where I put the sensor for my oil temp gauge.If your friend used pipe plug to drain thats ok just put something on it so it don`t leak,it doesn`t have an o-ring..Tom..
On my FSXT, the one with the allen (which is the CORRECT one to use for oil changes on this bike) comes directly from the oil tank and is fed by an oil line that comes off the bottom of the tank. There is also a plug on the engine case which can be used to drain the sump if desired (I've never screwed with it). Tom did a fine job of explaining what happens if you use this plug versus the correct one when doing an oil change.

For your situation it sounds like it's a different model than mine. I would assume the correct drain plug is the one with the allen and that it is also fed directly from the oil pan versus the other plug which is just a hole in the sump.
__________________
02FXSTi...107" CI
S&S 4-3/8 stroker crank
Big Boyz Heads/CP Pistons - 10:1 CR
Andrews 37 cam
SE camplate/HO oil pump/tensioner upgrade
Dan Vance Ported TB (48mm)
SE II Slip-on's (soon to be 2-1 ST SuperMeg?)
Built by me with help from VTF
Sturge is offline   Reply With Quote
Old 07-20-2010, 12:10 PM   #8 (permalink)
FNG :)
 
Join Date: Jun 2008
Location: Wisconsin
Posts: 4
I-like-my-rk wants to know Dino or Syn?
A picture tells a thousand stories but I find very few anywhere, even in the service manuals, thinks aren't always clear but pics would tell the story...
I-like-my-rk is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 11:44 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
(C)2001-2012 V-twinForum.com All Rights Reserved (C)2001- V-twinForum.com All Rights Reserved
Motorcycle News, Videos and Reviews
Honda Grom Forum Harley Davidson Forum Honda 600RR Kawasaki Forum Yamaha R6 Forum Yamaha FZ-09 Forum
1199 Panigale Forum Roadglide Forum Honda CBR1000 Forum Vulcan Forum Yamaha R1 Forum Yamaha R3 Forum
Ducati Monster Forum Harley Forums Honda CBR250R Forum ZX10R Forum Star Raider Forum Yamaha Viking Forum
Suzuki GSXR Forum V-Rod Forums Honda Shadow Forum Kawasaki Motorcycle Forum Star Warrior Forum KTM Duke 390 Forum
SV650 Forum BMW S1000RR Forum Honda Fury Forum Kawasaki Versys Forum Drag Racing Forum Ducati 899 Panigale Forum
Suzuki V-Strom BMW K1600 Triumph Forum Victory Forums Sportbikes BMW NineT Forum
Volusia Forum BMW F800 Forum Triumph 675 Forum MV Agusta Forum HD Street Forum Suzuki GW250 Forum
Yamaha Motorcycles Victory Gunner Forum Honda Vultus Forum HD LiveWire Forum