Welch Plugs

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Categories: Engine Mechanical | Cooling System | Transmission

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Revision as of 08:03, 1 January 2015 ddgonzal (Talk | contribs) <- Previous diff		Current revision ddgonzal (Talk | contribs) (->Terminology)
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 {{web|www.britishcarweek.org/welch_plug.html|circa 1910 by the Welch brothers}} at the Welch Motor Car Company of Pontiac, Michigan. You may hear them called "welsh plugs". See {{web|www.google.com/patents/US1058210|Patent No 1058210}}.
		+
		+	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 (core plugs). Those that are designed for freezing safety may be called "expansion plugs" or '''frost plugs'''.
	= Set =		= Set =
-	DORMAN 557-031 A12 & A13 engines	+	Sets are for the engine block only (does not include the Cylinder Head plugs).
-	<br>[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/A12ampA13ENGINEEXPANSIONPLUGKIT.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/A12ampA13ENGINEEXPANSIONPLUGKIT.jpg]	+
-	MAFCO 437 120Y 1969-1972	+	{{search|Nissan+A14+core+plugs|Nissan A14 core plugs}}
-	<br>[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/Mafco437enginecoreplugset1969-1972A12.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/th_Mafco437enginecoreplugset1969-1972A12.jpg]	+
-	MAFCO 441 Sunny 140Y 1980-1982	+	PLUG-WELCH A10/A12/A13/A12A/A14/A15 (see [[Block_%26_Pan_Part_Numbers]])
-	<br>[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/Mafco441enginecoreplugsetB3101980-1982.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/th_Mafco441enginecoreplugsetB3101980-1982.jpg]	+	{{SearchPart|11019-32200}} 44 Ø CAM bore, rear
		+	{{SearchPart|00933-15000}} 50 Ø CORE block, rear
		+	{{SearchPart|00933-13500}} 35 Ø CORE block, side (3)
		+	* NOTE: [[Block_Comparison#M2_Block|M2 Block]] reportedly uses 25mm plugs
-	MAFCO 438 1972-1980	+	Some sets include:
-	<br>[http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/Mafco438enginecoreplugset1972-1980A12.jpg http://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/th_Mafco438enginecoreplugset1972-1980A12.jpg]	+	11021-13200 PLUG-taper (12.7ø) (fixing [cam] oil gallery) (2)
		+
		+	Pioneer PE-130 (PE-130B contains four brass plugs for the water-contact plugs + one steel)
		+	<br>{{Album|26530}}
		+	<br>Pioneer includes front & rear oil gallery blind plugs
		+
		+	REPCO 058-4030 Expansion Plugs for A12, A13, A14
		+	<br>{{Album|28765}}
		+
		+	DORMAN 557-031 A12 & A13 engines
		+	<br>{{Album|28767|replaced=Photo\A12ampA13ENGINEEXPANSIONPLUGKIT.jpg}}
		+
		+	MAFCO 437 120Y 1969-1972 (http://www.mafcobell.co.uk). MAFCO have got the name and years wrong, and one plug appears to be the wrong size
		+	<br>{{Photo|Mafco437enginecoreplugset1969-1972A12.jpg}}
	= 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>{{Album|15003}}
-	* 00933-14000 PLUG-WELCH (1) head, rear [reportedly 40 mm]	+	* 00933-14000 PLUG-WELCH (1) head, rear [40 mm]
	= Engine Block=		= Engine Block=
	== B110 ==		== B110 ==
-	Five Welch Plugs	+	Five Welch Plugs (including three on side of block)
-	<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=15004 http://datsun1200.com/modules/myalbum/photos/15004.jpg]	+	<br>{{Album|15004}}
-	* 11019-32200 PLUG-WELCH 44 CAM BEARING (1) block, rear (44.425 mm)	+
-	* 00933-15000 PLUG-WELCH 50 CORE HOLE (1) block, rear prev. 01648-00084	+	Two on REAR: Large core plug + smaller cam bore plug
-	* 00933-13500 PLUG-WELCH 35 CORE HOLE (3) block, right side	+	<br>{{Album|28768|was=Photo\n59975533yoshi_senna-img600x450-1211090038fvol0413765.jpg}}
-	*: [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]	+	* 11019-32200 PLUG-WELCH 44 Ø CAM BEARING (1) block, rear (44.425 Ø) [1-3/4 inch]
-	*: 35mm brass core-plugs	+	* 00933-15000 PLUG-WELCH 50 Ø CORE HOLE (1) block, rear prev. 01648-00084
		+
		+	Three 35mm core-plugs on manifold side
		+	<br>{{Album|6107}} {{Album|6109}}
		+	* 00933-13500 PLUG-WELCH 35 Ø CORE HOLE (3) block, right side
	== B120 ==		== B120 ==
-	35 mm Expansion Plug 00933-13500 / 11021-E3000 / 00933-1351A	+	35 mm Expansion Plug 00933-13500/11021-E3000/00933-1351A
	Nominal Dia.: 35.21mm		Nominal Dia.: 35.21mm
	Steel		Steel
Line 41:		Line 63:
	8506-8706 11021-E3000 [11021E]		8506-8706 11021-E3000 [11021E]
	8706- 00933-1351A		8706- 00933-1351A
		+
		+	Cam bore plug
		+	11019-32200 44 mm -8506
		+	01648-00191 8506-
	= 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>{{Album|1668}}
	* 00933-11400 PLUG-WELCH TRANSMISSION CASE (2) inside bell, northwest of mainshaft		* 00933-11400 PLUG-WELCH TRANSMISSION CASE (2) inside bell, northwest of mainshaft
		+	*: 14mm diameter, all 56-series and 60-series
	* 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	+
-	*: [http://datsun1200.com/modules/myalbum/photo.php?lid=6901 http://datsun1200.com/modules/myalbum/photos/thumbs/6901.jpg]	+	The two small plugs can be seen in this photo, to the left of the spring:
		+	<br>{{Photo|TM-04_TM9.jpg|Datsun%201200/wiki/trans}}
	= Removal and installation =		= Removal and installation =
Line 54:		Line 82:
	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.
		+
		+	= Others =
		+	MAFCO 438 1972-1980
		+	<br>{{Photo|Mafco438enginecoreplugset1972-1980A12.jpg}}
		+
		+	MAFCO 441 Sunny [[140Y]] 1980-1982
		+	<br>{{Photo|Mafco441enginecoreplugsetB3101980-1982.jpg}}
		+
		+	above looks to be for L14 engine
		+	[[PB210]] (140Y in South Africa) - L14 engine
		+	{{SearchPart|11021-21000}} PLUG-welch [6 total, 40 mm]
		+	* (3) right side
		+	* (2) left side
		+	* (1) rear
		+	cylinder head
		+	* {{SearchPart|00933-13500}} PLUG-welch, 35 -7410
		+	* {{SearchPart|00322-13000}} PLUG-welch, 30 -7410
		+	* {{SearchPart|11048-73403}} PLUG-blind (2) 7411
		+
		+	[[Category:Engine Mechanical]][[Category:Cooling System]][[Category:Transmission]]{{End}}

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Current revision

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 1 Terminology 2 Set 3 Cylinder Head 4 Engine Block 4.1 B110 4.2 B120 5 Transmission 6 Removal and installation 7 Others

Terminology

The Welch plug was originally designed circa 1910 by the Welch brothers☁ at the Welch Motor Car Company of Pontiac, Michigan. You may hear them called "welsh plugs". See Patent No 1058210☁.

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 (core plugs). Those that are designed for freezing safety may be called "expansion plugs" or frost plugs.

Set

Sets are for the engine block only (does not include the Cylinder Head plugs).

Nissan A14 core plugsᴳ

PLUG-WELCH A10/A12/A13/A12A/A14/A15 (see Block_&_Pan_Part_Numbers)
11019-32200ᴳ 44 Ø CAM bore, rear
00933-15000ᴳ 50 Ø CORE block, rear
00933-13500ᴳ 35 Ø CORE block, side (3)
* NOTE: M2 Block reportedly uses 25mm plugs

Some sets include:
11021-13200 PLUG-taper (12.7ø) (fixing [cam] oil gallery) (2)

Pioneer PE-130 (PE-130B contains four brass plugs for the water-contact plugs + one steel)
Album 26530
Pioneer includes front & rear oil gallery blind plugs

REPCO 058-4030 Expansion Plugs for A12, A13, A14
Album 28765

DORMAN 557-031 A12 & A13 engines
Album 28767

MAFCO 437 120Y 1969-1972 (http://www.mafcobell.co.uk). MAFCO have got the name and years wrong, and one plug appears to be the wrong size

Cylinder Head

One Welch Plug:
Album 15003

• 00933-14000 PLUG-WELCH (1) head, rear [40 mm]

Engine Block

B110

Five Welch Plugs (including three on side of block)
Album 15004

Two on REAR: Large core plug + smaller cam bore plug
Album 28768

* 11019-32200 PLUG-WELCH 44 Ø CAM BEARING (1) block, rear (44.425 Ø) [1-3/4 inch]
* 00933-15000 PLUG-WELCH 50 Ø CORE HOLE (1) block, rear prev. 01648-00084

Three 35mm core-plugs on manifold side
Album 6107 Album 6109

* 00933-13500 PLUG-WELCH 35 Ø CORE HOLE (3) block, right side

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

Cam bore plug
11019-32200 44 mm -8506
01648-00191       8506-

Transmission

Three Welch Plugs
Album 1668

• 00933-11400 PLUG-WELCH TRANSMISSION CASE (2) inside bell, northwest of mainshaft

  14mm diameter, all 56-series and 60-series

• 32102-18000 PLUG-WELCH TRANSMISSION CASE (1) inside bell, below mainshaft

The two small plugs can be seen in this photo, to the left of the spring:

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.

Others

MAFCO 438 1972-1980

MAFCO 441 Sunny 140Y 1980-1982

above looks to be for L14 engine
PB210 (140Y in South Africa) - L14 engine
11021-21000ᴳ PLUG-welch [6 total, 40 mm]
* (3) right side
* (2) left side
* (1) rear
cylinder head
* 00933-13500ᴳ PLUG-welch, 35 -7410
* 00322-13000ᴳ PLUG-welch, 30 -7410
* 11048-73403ᴳ PLUG-blind (2) 7411 

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