MGA Part Numbers

The MGA With An Attitude

MGAguru.com

MGA Part Numbers - 17H6679
Allen Key for Tensioner Adjustment

PART NO.  SPL.PAGE  DESCRIPTION                                                             
2H4905    15.A.3    Chain -timing -(engine unit, 1500)
2H4905    sup.4     Chain -timing -(engine unit, sup)
2H4905    16.A.4    Chain -timing -(engine unit, 1600)
2H4905    16.A.25   Chain -timing -(engine unit, 1622)
17H343    16.A.25   Chain tensioner servicing kit -(engine unit, 1622) -not available use
    component parts
17H343    15.A.3    Tensioner -chain (with Allen key) [Com.(E)GB259]
17H343    16.A.4    Tensioner assembly -chain -(engine unit, 1600)
17H343    16.A.25   Tensioner assembly -chain -(engine unit, 1622) -not available use
    component parts
17H6680   sup.4     Tensioner -chain -(engine unit, sup)
17H6680   16.A.4    Tensioner assembly -(timing chain, engine unit, 1600)
17H6680   16.A.25   Tensioner assembly, engine unit, 1622)
17H31     sup.4     Slipper head -(chain tensioner -(engine unit, sup)
17H31     16.A.4    Slipper head -(chain tensioner -(engine unit, 1600)
17H31     16.A.25   Slipper head -(chain tensioner -(engine unit, 1622)
17H6679   sup.4     Key -allen -(tensioner adjustment, engine unit, sup)
17H6679   16.A.4    Key -allen -(tensioner adjustment, engine unit, 1600)
17H6679   16.A.25   Key -allen -(tensioner adjustment, engine unit, 1622) -service
    purposes only
AEC339    15.A.3    Joint for tensioner [Com (E) GB259]
AEC339    15.A.3    Washer -joint -tensioner -(engine unit, sup)
AEC339    16.A.4    Washer -joint -tensioner -(engine unit, 1600)
AEC339    16.A.25   Washer -joint -tensioner -(engine unit, 1622)
HBN0412   15.A.3    Screw for tensioner [Com (E) GB259]
HBN0412   15.A.8    Screw -strainer [Fin(E)GB46044 except 46101-46342]
HBN0412   sup.4     Screw -tensioner -(engine unit, sup)
HBN0412   16.A.4    Screw -tensioner -(engine unit, 1600)
HBN0412   16.A.25   Screw -tensioner to crankcase (2) -(engine unit, 1622)
AEC340    sup.4     Washer -locking -screw -(tensioner, engine unit, sup)
AEC340    16.A.4    Washer -locking -screw -(tensioner, engine unit, 1600)
AEC340    16.A.25   Washer -lock -screw -(tensioner, engine unit, 1622)

17H6680 Tensioner Assembly should always include the tensioner body and backing plate, internal spring and locking cam, the 17H31 Slipper head, the hex head plug with locktab, and possibly one AEC339 joint washer (paper gasket) . The AEC340 screw locking washer (2-hole locktab) can be cut in half to make two serviceable 1B3363 Locktab for the hex head plug. (This is the same single screw locktab used in the gearbox for the reverse gear shaft locking screw, which is also not available).

17H343 Chain Tensioner Servicing Kit (when it was available) included the 7H6680 Tensioner assembly, plus the AEC339 joint washer paper gasket ), two HBN0412 hex head screws, AEC340 screw locking washer (2-hole locktab), and the 17H6679 Allen Key which is used to retract the internal spring loaded locking cam. If the service kit is not available, note to use the separate component parts.