BIG HEALEY OIL SEAL INTERCHANGE LIST

Doug Jackman, Iowa Region

SEAL MM #)

FITS

WESTON

C/R

NATIONAL

Water Pump (2H4500)

BN1,2,4

6,7, BT7

-

7429,

7440

1020,

480954

Rear trans/OD

(7H5888)

BN1,2,4,

6,7, BT7

WR-112

550080

1029

Clutch housing top shifter (lB3719)

BN7, BT7

WR-71

12830

350878

Front eng cover (2K7139)

BN1,2

WRS-21

550104

1127

Front eng cover (AEC621)

All 6 cyl

WET-10

550099

1125

Front pinion spiral bevel (1A3253)

BN1

13560

550097

1016

Front pinion hypoid (ATC7085)

BN2 on up

TAR-125

550101

1117

Rear wheel spiral bevel (8G555)

BN1

WR-129

550086

1066

Rear wheel hypoid (3H1589)

BN2 on up

WR-137

550082

1065

Idler (3H3132)

BN1 - 231108

8670

1021

Idler (1B6256)

231109 on

9876

1098

Front wheel (BG554)

All

WR-135

WR-135

1019

This list is only partial; marry of the BU numbers simply do not cross to American seal numbers. This is not to say that the equivalents are not available, it's just that since the Big Healey went to the Valhalla of Motordom in 1967, the BUU numbers are so rarely seen that they're not listed or have been superseded. Any Healey seal can be found in, say, a C/R or National number. All you need to know is the O.D. of shaft that fits through the seal, I.D. of housing that the seal fits in ("bore') and thickness of the seal ("width"). With these three dimensions, any seal supplier can provide you with a modern seal.

 

A more useful table might be one that lists the component dimensions rather than the seal numbers. The shaft OD and housing bore will give you a group of seals, each with a different width. You will find that as long as the shaft C® and housing bore are correct, you can use seals of varying widths. In other words, if the seal you're looking for originally bad a width of 0.500", you may be able to use a seal with a width of, say, 0.625". The pinion housing on a hypoid rear end (for example) will indeed accept a seal twice as wide (thick) as the original.

 

There's no reason for your Healey to leak oil. So if you've received a Letter of Appreciation from the OPEC Nations, do something about it.