steering box leaking from filler/drain plug

New posts disabled. Archived technical discussion about the Datsun PL510
Posts: 145
Joined: 28 Dec 2004 09:09
Location: Surrey, BC

steering box leaking from filler/drain plug

Postby 72dat » 16 Apr 2009 18:35

It appears that my steering box is leaking from a small pin hole from the filler/drain plug. Do all plugs have this pin hole. If so, should it be leaking from there? attached a pic.


User avatar
Posts: 4973
Joined: 12 May 2005 14:45
Location: Vermont

Re: steering box leaking from filler/drain plug

Postby defdes » 16 Apr 2009 19:03

It's a breather. Mine does the same thing.

Posts: 208
Joined: 11 Jan 2009 19:48

Re: steering box leaking from filler/drain plug

Postby 510Martinez » 16 Apr 2009 19:28

I don't know if it's supposed to be there. I have a filler plug for a Roadster (same box basically) on my desk and there is no hole in it.

User avatar
Posts: 683
Joined: 03 Mar 2007 20:39
Location: Abbotsford, BC

Re: steering box leaking from filler/drain plug

Postby Dimebag » 16 Apr 2009 20:08

when I got my car it had a clean dry steering box, but the filler plug appeared to be quite beat up so I bought a new one from Nissan. I don't know if the original had that breather hole, but the new one does and now my steering box is always wet from filler plug.
John Thiessen
72 Wagon

User avatar
Posts: 10072
Joined: 04 Aug 2003 20:45
Location: White Rock, B.C. Canada

Re: steering box leaking from filler/drain plug

Postby bertvorgon » 16 Apr 2009 20:56

They always weep. When the box oil gets heated from the headers, etc, plus any cornering forces, the oil, specially if stock oil, just plain comes out the vent hole.

My concern if non vented, IE no hole, would be that in high heat situations, the oil could blow by the seal, maybe no biggy. A lot of us put 80/90 gear oil in, and I know I run my level just a touch low, to have a bit more room to expand. I have a turbo sitting close to mine, so it does get quite hot.

I was always going to make a "stand pipe" for my box, a threaded insert maybe 1-2" high, with the plug on top of that. that would eleiminate the weeping.
"Racing makes heroin addiction look like a vague wish for something salty" - Peter Egan

Keith Law
1973 2Door Slalom/hill climb/road race / canyon carver /Giant Killer 510
1968 Vintage 3HP Mini Bike
1971 Vintage 13' BOLER trailer

User avatar
Posts: 354
Joined: 06 Jul 2007 23:38
Location: San Diego!

Re: steering box leaking from filler/drain plug

Postby sdterrible1 » 17 Apr 2009 09:54

I put a barb fitting in there to replace it and attached a hose to it to breath. The hose runs up and rests next the where the m/c is.
Drive a Datsun

Return to “Technical - Archive”

Who is online

Users browsing this forum: No registered users and 2 guests