ffl®GlP®m GJ:flffi£IDmtW. Service Dala No. 220 MORRIS MINOR (SERIES II) Manufacturers : Morris Motors, Ltd., Cowley, Oxford. All rights reserved. This service Data Sheet is compiled by the technical staff of MOTOR TRADER and BRITISH AUTOMOBILES OVERSEAS, and is checked by the vehicle manufacturers. It is the copyright of these journals, and may not be reproduced, in whole or in part, without permission. , ..... , ......................................... , HIS version of the smallest of the Left is the 1955 model announced on day of publication, distinguishable from the current Morris range of vehicles earlier model (right) with vertically-slotted grille. Two-door and four-door saloons, T now in production results. from and a tourer, all basically similar in conception, are produced standardization following the merging of the Austin and Nuffield groups. Originally front carpet and felt, also gearbox cover the Minor was introduced in 1950 and ENGINE plate and three set-bolts securing gear powered by a four cylinder sidevalve Mounting lever and take out lever. Lower r�ar of engine, whereas the present _model has At from, bonded rubber blocks bolted power unit and detach cross-members; the standardized B.M.C. engine, clutch to lugs on front engine plate and to unit may then be raised and mana:uv;:ed and gearbox unit. brackets on body extensions. At rear, forward clear of car. Various modifications have been made gearbox extension housing passes through Crankshaft since introduction and a list of the major inverted U-shaped rubber block, located Three main bearings, thin wall steel­ ones is to be found in the table of by flange on housing. Block fits into backed, white metal-lined located by tabs. engineering changes. Important amo�g shaped channel in propeller shaft tunnel End float controlled by split thrust these is redesign of the swivel pm integral with body floor. Strap with re­ washers recessed either side of centre assembly, which is now manufactured tainer bolted across bottom holds mount­ main bearing and retained by tabs in cap. fitted with a bush, thrust washer and seal­ ing up in position. All bolts should be Fit with oil grooves to crankshaft, no ing ring all of which are renewa�le. This tightened fully. hand fittin2 oermissible modification is Handard production from Removal Main bearings cannot be changed with the chassis number given onwards, and engine in place, as rear cap cannot be de­ chassis prior to this may be similarly fitted Engine may be withdrawn with or tached without removal of rear engine with these parts when overhaul becomes without gearbox but radi_ator and grille plate, but thrust washers can be renewed. necessary. The new "A" type rear axle must be removed in either case. Secure Oil intake strainer and suction tube described herein is now standard on pro­ bonnet in fully open position, drain assembly (union screwed into bottom face duction models of Series II, but some cars coolant and disconnect all pipes, wires of crankcase) must be removed completely will have been produced with former type and controls including heater connections before centre bearing cap can be removed. semi-floating hypoid axle and for dismant­ if fitted. Remove carburetter and air Flywheel, with shrunk-on starter ring ling and overhaul procedure of this unit cleaner. Remove four setbolts and spring gear, spigoted on rear flange of crankshaft see Trader Service Data No. 167. washers fixing radiator to grille and lift and retained by four equally spaced set­ On the date of publication the 1955 out radiator and also grille surround screws. Oil-impregnated spigot bearing model is announced, w h i c h i s attached to wings and frame (3 2BA bush pressed into end of shaft. mechanically similar to the early models, nuts beneath wing). Disconnect and Timing sprocket and pulley hub, with but has a restyled radiator grille and withdraw clutch operating rod and speedo oil thrower between, pressed on front end instrument panel, details of which appear cable end from gearbox, detach rear of of crankshaft, sharing special flat Wood­ on this page. propeller shaft. Uncouple engine steady ruff key, and retained by hand starter Identification is by car, model, and cable and cylinder head steady on later dog setscrew. Sprocket fits with longer engine numbers which are stamped on models. Take weight of engine on sling, boss to rear, with shims behind for align­ identification plates. One of these, carry­ supporting lifting brackets on rocker ment. Pulley hub passes through felt ing car and model number, is fixed on the cover, and remove front mounting sealing ring in timing cover. Tighten off side of the dash panel beneath the brackets with rubber blocks and take off starter dog setscrew until, with crankshaft bonnet. Engine number is stamped on rear mounting retainer and strap. Remove at T.D.C. 1 & 4, jaws are at "20 past 10." a disc attached to cylinder block casting. Screwed components are being manu­ INSTRUMENTS AND CONTROLS (Earlier models, left, latest model, ri&ht) factured with Unified screw threads and 1. Screenwiper switch. centre of bonnet opening to 15. Clutch pedal. nuts in increasing numbers and the 2. lcnilion warninr fifht. k pushed down.) 1&. Dipper swilch. 3. Midure control. 9. Fuel raure. 17. Gear lever, showing rear general standardization classification 4. lcnition switch. 10, Speedometer positions. scheme facilitates identification. It 5. Panel light switch. 18. Heater control. should be noted that nuts, bolts and �t �����=!���•,irrci�• n nl ht screws, etc., marked as such are not ;: t:����t!rr!�.h. 13. Accelerator. �t �l!s��� i::r��� �fg�(! . a. Bonnot lock (safety catch in 14. Brake pedal. 21. Main beam warnin: lfcht. interchangeable with B.S.F. or Whitworth threaded units, although for all practical purposes the U.N.F. thread is inter­ changeable with the A.N.F. thread. In cases of doubt care should be taken to see that screwed components are assembled as they were dismantled. Special tools listed in these pages are designed to speed up operations of over­ haul and many of these tools will be found to suit other vehicles in the range. Similatity of use to which these tools can be put on other vehicles is clearly marked in the tabular information. ii MORRIS MINOR SERIES II Supplement to "Motor Trader", 20 October 1954 • • Components of the engine block, showing sump, water pump, manifolds, and, below, camshaft, crankshaft, valve train, oil pump, piston assembly and alternative air cleaners Supplement to " Motor Trader ", 20 October I 9 5 4 MORRIS MINOR SERIES II iii f Rear main bearing cap forms lower half of oil collector trough round return ENGINE DATA ENGINEERING CHANGES thread on shaft. Upper half detachable, ... .. Chaosis retained by three setscrews. If detached, No. ofx cylinders ... ... .. No. upper half must be refitted so that it butts Bore stroke: mm... ... ... 58 XX 78 in . 2,28 3.0ln CHASSIS Home and on cap after cap has been tightened fully. .. ... .. Export Capacity: CUc.c, IR ... ... 800 r x r ... .. 49 Connecting Rods r 8 43 ear axle introduced replacing R.A.C. ated h.p. ::: ... ... 7.75 Max. b.h.p. at .p.m. .. 30 at 4,800 7x 37 axle ... ... ... ... 170883 Big ends thin wall, steel-basked, white ... Crown wheel bolts increased to fin dia 182745 Max torque at r.p.m. ... .. 401D/fl at 2,200 Wheel bolts with larger hexagon metal-lined shells, located by tabs. No Compression ratio ... 7.2:1 (,705in/,710in)r introduced ...c ... 184472 hand fitting permissible. Rods split Improvedc elay shaft for clut h intro- diagonally, cap and rod stamped on same du edr (R.H.D. only)r ... .. r . .. 184780 CRANKSHAFT AND CON. RODS Rubbe boots int oduced on 1tee lng side. ballJoints• · Big ends are offset. Fit Nos. 1 and 3 ... Main Bearinrs Crankpin• Diameter . .. 1.7505in ... 1.4379in i'rin dia clutch rod fittedc .. ... 198890 with larger boss to rear, 2 to 4 to front. I Supprenorswiring... Introdu... ed... on ...ignition ... Lencth 1.395in ... 1.0681n r 205839 Oil bleed hole on longer side of big end Larger glaSli channels and rubbe s must go to off side, away from camshaft. Running clearance: ... .. .. introduced to improve seal ... c . .. 205850 main bearings ... .. .001-.0021n Gudgeon pins cotter-clamped in small big ends ... ... ... .00061n-.OOtala Modi fledr exh aust assembly introdu ed ... 210866 ends, clamp towards camshaft. Slung ool liningr introduceduc . ... 220001 End float: main bearings ... ... .002in big ends... ... ... .008in s D; 216484 Pistons ��:�:{;:� :r�,i��t,o� ::d " Undersizes: main ... ... .. .020-,040in Luxe " models . .. ... .. 221803 Aluminium alloy, T-slot, anodized, big ends .021h040in Introduction of wheel studs and nuts in Con. rod centres ... 5,751n I ieu of bolts . .. ... 228267 with dished crown. No._ o_f teeth... on starter. .. ri�,... gea;i. .. Modified swivel pin assemblies... ... 228287 Pistons are supplied in fivesize gradings p1n1on 104/9 Improved shock absorbers fitted ... 240671 for selective assembly, rising in .0003in En1ine sleady cable introduced ... 264013 steps. Grade numbers 1 to 5 stamped in PISTONS AND RINGS • Approx. 23/3/53 diamond with " front " on piston crown. Clearance (skirt): .., ENGINE Engine Grade number must correspond with lop ... ...... ... .0021-.00391n No. number stamped on top of cylinder block bottom .0006-.00Hln r r Oversizes .01G-.020.-0J0-.0401n Modified oil pump drive .. ... 693 alongside bore. r ± c Weicht witho�t rings... Int oduction of modified ca buretter Top compression ring plain, second or pin ... 5 oz 12 d 2 dr and manifold distan e-piece... .. 928 c ring has taper face and must be fitted Gudgeon pin: ... Introduction of gudgeon pin clamping with side marked "TOP" upwards. On diameter ... ... .562in s rew with larger head .