![[Datsun 1200 encyclopedia]](/wiki/upload/wiki.png)
| Revision as of 05:01, 2 January 2015 ddgonzal (Talk | contribs) (->Set) <- Previous diff |
Revision as of 01:11, 13 February 2016 ddgonzal (Talk | contribs) Next diff -> |
||
| Line 1: | Line 1: | ||
| - | [[Category:Engine Mechanical]][[Category:Cooling System]][[Category:Transmission]] | + | '''Welch plugs''' (core plugs) are circular discs that fit into, and seal the casting and machining holes in the [[Engine block]], [[Cylinder Head]] and [[Transmission]]. |
| - | '''Welch plugs''' (core plugs) are circular discs that fit into, and seal the casting and machining holes in the [[Engine block]], [[Cylinder Head]] and [[Transmission]]. You may hear them called "welsh plugs". They are often called "freeze plugs" because if the engine coolant freezes they'll be pushed out of the casting. However, the purpose is not necessaryily to solve freezing problems but rather to seal the holes left by the casting or machining process. Those that are designed for freezing safety are called "expansion plugs". | + | |
| + | = Terminology = | ||
| + | The Welch plug was originally designed in the 1900s by the Welch brothers at the Welch Motor Car Company of Pontiac, Michigan. You may hear them incorrectly called "welsh plugs". | ||
| + | |||
| + | They are often called "freeze plugs" because if the engine coolant freezes they'll be pushed out of the casting. However, the purpose is not necessarily to solve freezing problems but rather to seal the holes left by the casting or machining process. Those that are designed for freezing safety are called "expansion plugs". | ||
| = Set = | = Set = | ||
| Line 28: | Line 32: | ||
| = Cylinder Head= | = Cylinder Head= | ||
| One Welch Plug: | One Welch Plug: | ||
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=15003 http://datsun1200.com/modules/myalbum/photos/15003.jpg] | + | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=15003 http://datsun1200.com/uploads/photos/15003.jpg] |
| * 00933-14000 PLUG-WELCH (1) head, rear [reportedly 40 mm] | * 00933-14000 PLUG-WELCH (1) head, rear [reportedly 40 mm] | ||
| Line 34: | Line 38: | ||
| == B110 == | == B110 == | ||
| Five Welch Plugs | Five Welch Plugs | ||
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=15004 http://datsun1200.com/modules/myalbum/photos/15004.jpg] | + | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=15004 http://datsun1200.com/uploads/photos/15004.jpg] |
| [http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/n59975533yoshi_senna-img600x450-1211090038fvol0413765.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/th_n59975533yoshi_senna-img600x450-1211090038fvol0413765.jpg] | [http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/n59975533yoshi_senna-img600x450-1211090038fvol0413765.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/th_n59975533yoshi_senna-img600x450-1211090038fvol0413765.jpg] | ||
| Line 41: | Line 45: | ||
| * 00933-13500 PLUG-WELCH 35Ø CORE HOLE (3) block, right side | * 00933-13500 PLUG-WELCH 35Ø CORE HOLE (3) block, right side | ||
| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=6107 http://datsun1200.com/modules/myalbum/photos/thumbs/6107.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=6109 http://datsun1200.com/modules/myalbum/photos/thumbs/6109.jpg] | + | [http://datsun1200.com/modules/myalbum/photo.php?lid=6107 http://datsun1200.com/uploads/thumbs/6107.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=6109 http://datsun1200.com/uploads/thumbs/6109.jpg] |
| * 35mm brass core-plugs | * 35mm brass core-plugs | ||
| Line 58: | Line 62: | ||
| = Transmission = | = Transmission = | ||
| Three Welch Plugs | Three Welch Plugs | ||
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=1668 http://datsun1200.com/modules/myalbum/photos/1668.jpg] | + | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=1668 http://datsun1200.com/uploads/photos/1668.jpg] |
| * 00933-11400 PLUG-WELCH TRANSMISSION CASE (2) inside bell, northwest of mainshaft | * 00933-11400 PLUG-WELCH TRANSMISSION CASE (2) inside bell, northwest of mainshaft | ||
| * 32102-18000 PLUG-WELCH TRANSMISSION CASE (1) inside bell, below mainshaft | * 32102-18000 PLUG-WELCH TRANSMISSION CASE (1) inside bell, below mainshaft | ||
| *: Can be seen in photo, just below throwout bearing | *: Can be seen in photo, just below throwout bearing | ||
| - | *: [http://datsun1200.com/modules/myalbum/photo.php?lid=6901 http://datsun1200.com/modules/myalbum/photos/thumbs/6901.jpg] | + | *: [http://datsun1200.com/modules/myalbum/photo.php?lid=6901 http://datsun1200.com/uploads/thumbs/6901.jpg] |
| = Removal and installation = | = Removal and installation = | ||
| Line 68: | Line 72: | ||
| To install, fit squarely into bore, and tap gently and evenly into place. No sealer is used. | To install, fit squarely into bore, and tap gently and evenly into place. No sealer is used. | ||
| + | |||
| + | [[Category:Engine Mechanical]][[Category:Cooling System]][[Category:Transmission]] | ||
Revision as of 01:11, 13 February 2016
Welch plugs (core plugs) are circular discs that fit into, and seal the casting and machining holes in the Engine block, Cylinder Head and Transmission.
Contents |
Terminology
The Welch plug was originally designed in the 1900s by the Welch brothers at the Welch Motor Car Company of Pontiac, Michigan. You may hear them incorrectly called "welsh plugs".
They are often called "freeze plugs" because if the engine coolant freezes they'll be pushed out of the casting. However, the purpose is not necessarily to solve freezing problems but rather to seal the holes left by the casting or machining process. Those that are designed for freezing safety are called "expansion plugs".
Set
DORMAN 557-031 A12 & A13 engines
MAFCO 437 120Y 1969-1972 (http://www.mafcobell.co.uk)
MAFCO 441 Sunny 140Y 1980-1982
above may be for L14 engine??? PB210 (140Y in South Africa) - L14 engine 11021-21000 PLUG-welch [6 total, 40 mm] * (3) right side * (2) left side * (1) rear cylinder head * 00933-13500 PLUG-welch, 35 -7410 * 00322-13000 PLUG-welch, 30 -7410 * 11048-73403 PLUG-blind (2) 7411
MAFCO 438 1972-1980
Cylinder Head
One Welch Plug:
- 00933-14000 PLUG-WELCH (1) head, rear [reportedly 40 mm]
Engine Block
B110
Five Welch Plugs
* 11019-32200 PLUG-WELCH 44Ø CAM BEARING (1) block, rear (44.425 Ø) [1-3/4 inch]
* 00933-15000 PLUG-WELCH 50Ø CORE HOLE (1) block, rear prev. 01648-00084
* 00933-13500 PLUG-WELCH 35Ø CORE HOLE (3) block, right side
* 35mm brass core-plugs
B120
35 mm Expansion Plug 00933-13500 / 11021-E3000 / 00933-1351A Nominal Dia.: 35.21mm Steel Height: 0.380"
プラグ (35mm - 3 required) 7510-8506 00933-13500 8506-8706 11021-E3000 [11021E] 8706- 00933-1351A
Transmission
Three Welch Plugs
- 00933-11400 PLUG-WELCH TRANSMISSION CASE (2) inside bell, northwest of mainshaft
- 32102-18000 PLUG-WELCH TRANSMISSION CASE (1) inside bell, below mainshaft
- Can be seen in photo, just below throwout bearing
-
Removal and installation
Removal: tap one edge with a punch or chisel, then grab it with vice-grips and wiggle it out.
To install, fit squarely into bore, and tap gently and evenly into place. No sealer is used.