Diff plug torque
9 posts
• Page 1 of 1
I've rebuildt the diff, only have to fill it with oil but can't find the right indicate tourque for:
- Level Plug
- Drain Plug
- Breather/Ventilation Plug
Searched the lotus manuall and brian buckland book, nothing to find for these 3 plugs.
- Level Plug
- Drain Plug
- Breather/Ventilation Plug
Searched the lotus manuall and brian buckland book, nothing to find for these 3 plugs.
- 1972 Lotus Elan Sprint LHD/DHC
- 1962 Austin Healey Sprite MK II - Sold 09.05.2016
Sorry for my bad survival English
- 1962 Austin Healey Sprite MK II - Sold 09.05.2016
Sorry for my bad survival English
-
mariodschy - Second Gear
- Posts: 117
- Joined: 10 Jan 2013
That's because basically you do them up until you think they are tight enough
Seriously, if they have fibre washer just do them up until you feel the fibre compress a bit then add a quarter to half a turn.
That's all I do anyway and I've not had one come out of its own accord.
Seriously, if they have fibre washer just do them up until you feel the fibre compress a bit then add a quarter to half a turn.
That's all I do anyway and I've not had one come out of its own accord.
Bill Williams
36/6725 S3 Coupe OGU108E Yellow over Black.
36/6725 S3 Coupe OGU108E Yellow over Black.
- billwill
- Coveted Fifth Gear
- Posts: 4405
- Joined: 19 Apr 2008
The biggest risk with the plugs is that various dopes over the years don't have the correct BSP/Whitworth spanners so make do with poorly fitting Metric/SAE/adjustable spanners. Eventually the corners wear off so that you either can't tighten them enough, or can't get them out.
Been there.
Nick
Been there.
Nick
-
elanner - Fourth Gear
- Posts: 547
- Joined: 14 Sep 2010
Bill,
Thanks. That's good to know. I'll get fill/drain plugs the next time I'm in Blighty. They ain't so easy over here (although I recently got one from Ray)....
Or kinda pricey:
http://magneticdrainplugs.co/purchasebythreadsize.php
Nick
Thanks. That's good to know. I'll get fill/drain plugs the next time I'm in Blighty. They ain't so easy over here (although I recently got one from Ray)....
Or kinda pricey:
http://magneticdrainplugs.co/purchasebythreadsize.php
Nick
-
elanner - Fourth Gear
- Posts: 547
- Joined: 14 Sep 2010
Have always hated those knuckle bashing square headed plugs that are not exactly square. Now, the first time they are removed, I chuck up the plug in the lathe and turn the squared portion to round. Then I TIG weld an appropriate sized nut to the plug. Then the corresponding sized socket or wrench can be used. No more left handed adjustable wrenches needed. If the next owner is offended, he can replace them with a new original style plug and a new box of bandages for his knuckles.
Rob Walker
26-4889
50-0315N
1964 Sabra GT
1964 Elva Mk4T Coupe (awaiting restoration)
1965 Ford Falcon Ranchero, 302,AOD,9",rack and pinion,disc,etc,etc,etc
1954 Nash Healey LeMans Coupe
Owning a Lotus will get you off the couch
26-4889
50-0315N
1964 Sabra GT
1964 Elva Mk4T Coupe (awaiting restoration)
1965 Ford Falcon Ranchero, 302,AOD,9",rack and pinion,disc,etc,etc,etc
1954 Nash Healey LeMans Coupe
Owning a Lotus will get you off the couch
- prezoom
- Coveted Fifth Gear
- Posts: 1192
- Joined: 16 Mar 2009
billwill wrote:That's because basically you do them up until you think they are tight enough
Seriously, if they have fibre washer just do them up until you feel the fibre compress a bit then add a quarter to half a turn.
That's all I do anyway and I've not had one come out of its own accord.
Thanks for your advice, i've done it by "feeling"
- 1972 Lotus Elan Sprint LHD/DHC
- 1962 Austin Healey Sprite MK II - Sold 09.05.2016
Sorry for my bad survival English
- 1962 Austin Healey Sprite MK II - Sold 09.05.2016
Sorry for my bad survival English
-
mariodschy - Second Gear
- Posts: 117
- Joined: 10 Jan 2013
I didn't think they were Witworth, are they? I had no issues witha spanner. I didn't have a drain so last year I pulled the difference took it apart and added a drain plug. I used a fiber washer but it was too hard. I had some leakage so drained the fluid to check for any issues after a year and replaced it with a soft copper washer and have no leaks.
- Tahoe
- Third Gear
- Posts: 498
- Joined: 19 Sep 2010
Hmm, strange, I'm pretty sure they're 1/4" W - but only as a result of personal observation. I don't have any documentation.
I have two diffs on the go right now. A 3.77 in the car with an original plug that seems best suited to a 1/4 W. And a rebuilt 3.54 waiting to go in this Spring (I hope) that has a replacement plug. I have the original, nicely rounded plug for it and it appears to have been a 1/4" W. I guess brass is soft enough that using the wrong size is both easy and damaging.
The replacement is the correct thread but has a metric head (14mm). Presumably that's the most useful thing to produce these days because Whitworth wrenches are so uncommon.
The larger diff plugs, of course, are less prone to damage. Sticking with my Whitworth premise:
- Breather - 7/16" W
- Filler - 3/8" W
Nick
Credit: http://www.bikeforums.net/classic-vinta ... hemes.html
I have two diffs on the go right now. A 3.77 in the car with an original plug that seems best suited to a 1/4 W. And a rebuilt 3.54 waiting to go in this Spring (I hope) that has a replacement plug. I have the original, nicely rounded plug for it and it appears to have been a 1/4" W. I guess brass is soft enough that using the wrong size is both easy and damaging.
The replacement is the correct thread but has a metric head (14mm). Presumably that's the most useful thing to produce these days because Whitworth wrenches are so uncommon.
The larger diff plugs, of course, are less prone to damage. Sticking with my Whitworth premise:
- Breather - 7/16" W
- Filler - 3/8" W
Nick
Credit: http://www.bikeforums.net/classic-vinta ... hemes.html
-
elanner - Fourth Gear
- Posts: 547
- Joined: 14 Sep 2010
9 posts
• Page 1 of 1
Total Online:
Users browsing this forum: No registered users and 11 guests