People often ask how many shims are needed, how thick are they, where can we find them, can we make our own? The list below shows every part called "shim" in the Service Parts Lists for MGA. There are a few information pages in the Part Numbers section (linked below), and may be more in the future.

PART NO. SPL.PAGE DESCRIPTION 6K907 15.F.3 Shim for bearing (0.002" thick)(A/R) -(1st motion shaft, gearbox, 1500) 6K907 16.F.2 Shim -1st motion shaft -0.002" (A/R) -(gearbox, 1600 and 1600-MK-II) 6K907 TC.F.3 Shim -bearing (A/R) -(0.002", 1st motion bearing, gearbox, Twin Cam) 6K908 15.F.3 Shim for bearing (0.004" thick) (gearbox input) -461-290 6K908 16.F.2 Shim -1st motion shaft -0.004" (A/R) -(gearbox, 1600 and 1600-MK-II) 6K908 TC.F.3 Shim -bearing (A/R) -(0.004", 1st motion bearing, gearbox, Twin Cam) 17H6425 16.J.1 Shim -pad housing .047" (1.19mm) -(rack assy, steering, 1600 and 1600-MK-II) 126920 16.J.1 Shim tail bearing 0.005" (.127mm) -(rack assy, steering, 1600 and 1600-MK-II) -changed to AAA1333 126920 TC.J.1 Shim tail bearing 0.005" (.127mm) -(rack assy, steering, Twin Cam) 126921 16.J.1 Shim tail bearing 0.007" (.178mm) -(rack assy, steering, 1600 and 1600-MK-II) -changed to AAA1334 126921 15.J.1 Shim for tail bearing (0.007") (A/R) (steering rack, steering, 1500) 126921 TC.J.1 Shim for tail bearing (0.007" [.1778mm]) (A/R) -(rack assy, steering, Twin Cam) AAA1333 16.J.1 Shim tail bearing 0.005" (.127mm) -(rack assy, steering, 1600 and 1600-MK-II) -was 126920 AAA1334 16.J.1 Shim tail bearing 0.007" (.178mm) -(rack assy, steering, 1600 and 1600-MK-II) -was 126921 ACA5249 15.J.1 Shim for pad housing (A/R) (rack damper) -(steering, 1500) ACA5249 16.J.1 Shim -pad housing .003" (.076mm) -(rack assy, steering, 1600 and 1600-MK-II) ACA5249 TC.J.1 Shim -pad housing .003" (.076mm) -(rack assy, steering, Twin Cam) ACA5301 15.J.1 Shim for ball housing (.003") (A/R) (for inboard tie rod joint, steering, 1500) ACA5301 16.J.1 Shim for ball housing .003" (.076mm) (A/R) (for inboard tie rod joint, steering, 1600 and 1600-MK-II) ACA5301 TC.J.1 Shim -ball housing .003" (.076mm) (A/R) (for inboard tie rod joint, steering, Twin Cam) ACA5302 15.J.1 Shim for ball housing .005" (A/R) (for inboard tie rod joint, steering, 1500) ACA5302 16.J.1 Shim for ball housing .005" (.127mm) (A/R) (for inboard tie rod joint, steering, 1600 and 1600-MK-II) ACA5302 TC.J.1 Shim -ball housing .005" (.127mm) (A/R) (for inboard tie rod joint, steering, Twin Cam) AEH400 TC.A.12 Shim -tappet adjustment (.086") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 1 AEH040002 TC.A.12 Shim -tappet adjustment (.088") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 2 AEH040006 TC.A.12 Shim -tappet adjustment (.090") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 3 AEH040006 TC.A.12 Shim -tappet adjustment (.092") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 4 AEH040008 TC.A.12 Shim -tappet adjustment (.094") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 5 AEH040010 TC.A.12 Shim -tappet adjustment (.096") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 6 AEH040012 TC.A.12 Shim -tappet adjustment (.098") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 7 AEH040014 TC.A.12 Shim -tappet adjustment (.100") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 8 AEH040016 TC.A.12 Shim -tappet adjustment (.102") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 9 AEH040018 TC.A.12 Shim -tappet adjustment (.104") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 10 AEH040020 TC.A.12 Shim -tappet adjustment (.106") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 11 AEH040022 TC.A.12 Shim -tappet adjustment (.108") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 12 AEH040024 TC.A.12 Shim -tappet adjustment (.110") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 13 AEH040026 TC.A.12 Shim -tappet adjustment (.112") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 14 AEH040028 TC.A.12 Shim -tappet adjustment (.114") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 15 AEH040030 TC.A.12 Shim -tappet adjustment (.116") (A/R) -(cyl.head, valves, engine, Twin Cam) -identification No. 16 AEH446 TC.A.8 Shim -half speed shaft (.002") (A/R) -(camshaft, engine, Twin Cam) AEH446 TC.A.8 Shim -half speed shaft (.003") (A/R) -(camshaft, engine, Twin Cam) AEH530 TC.A.17 Washer -distance -dynamo to inlet manifold (A/R) -(dist+dynamo mountings, engine, Twin Cam) -Alternative to using excessive qty. of AEH622 shim AEH622 TC.A.17 Shim -dynamo to inlet manifold (.003") (A/R) -(dist+dynamo mountings, engine, Twin Cam) -(for wide spaces, see also AEH530 Washer above) AHH6007 TC.J.3 Shim -rack to bracket (steering) DAP0829 16.J.2 Rivet -shim (A/R) -(steering, 1600 and 1600-MK-II)