primary drain plug not flush
Thread Starter
|
Road Master
Joined: Apr 2011
Posts: 1,077
Likes: 2
From: Orlando
primary drain plug not flush
Got tired of the leak at my plug so I bought a new outer primary off ebay for $125 and installed. Previous owner had tightened the plug until you could keep turning it and it would go straight thru. The new primary plug gets tight now but about 1/4 inch is sticking out the bottom. I guess I'm use to the plug going in flush . How far does the plug need to go in? No leaks so I figure its in far enough.
Seasoned HDF Member
Joined: Jun 2010
Posts: 9,332
Likes: 3,873
From: Upstate New York
The primary blug is a tapered pipe thread, which means it tightens up as it goes in. Tighten it until it's snug. Mine sticks out a bit, and how much can vary from bike to bike, depending on how deep the tap was run into the cover.
If you're worried about leaks, use a bit of Loctite pipe sealer on the threads. Then there will be no need to overtighten the plug.
If you're worried about leaks, use a bit of Loctite pipe sealer on the threads. Then there will be no need to overtighten the plug.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
Trending Topics
Elite HDF Member
Joined: Sep 2007
Posts: 4,468
Likes: 12
From: Bluffton, South Carolina
The specs I've seen are 1/8" of protrusion. If you go in too far you can spread out the hole or even crack the primary.
John
John
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Seasoned HDF Member
Joined: Jun 2010
Posts: 9,332
Likes: 3,873
From: Upstate New York
On my bike, if I had 1/8" of the plug protruding, it would fall out on the ground, so it apparently does vary somewhat. Both my tranny and primary plug are just above flush when snug.