|
|
BRITISH AUTOMOTIVE |
|
www.mgbmga.com MGTD Articles |
Technical Information (MGA 7)
MGA1500cc ENGINE REBUILD (1622cc
SPECIFICATIONS)
The following information should be read in conjunction with technical article MGA3 " MGA 1500ccc ENGINE REBUILD (1698cc SPECIFICATIONS).
This upgrade requires MGA1622cc (STD) flat top pistons (3" Bore) or any of the available oversize pistons. Also required are 1622cc or MGB 3 main Brg connecting rods. Rod bearings are identical for all MGA 1500cc 1600cc 1622cc and MGB 1800cc (3 main bearing) engines.
Lightening your existing flywheel from the OEM weight of 29lbs to around 23lbs will be beneficial. After machining have the flywheel & clutch cover assembly, along with the crankshaft & pulley, balanced. We recommend "Crowther Racing Engines" (707 778 6050) for this, plus all your machine shop work.
We recommend updating your timing cover & crankshaft pulley to the 5" MGB damper style. Make sure you have the matching cover & damper assemblies.
If you are using ARP rod bolt set #206-6003 as a replacement for the OEM style, be sure to check for rod bolt head interference with the cylinder block wall on number 1 and 4 cylinders. Also, be sure that the one of the bolts on each connecting rod does not bottom out in its thread. Shorten bolt as necessary.
Piston length on the 1500cc and 1600cc engines are identical 3.035", and the length of the 1500cc bore will accommodate the lower piston skirt ring which is common to the 1622cc piston.
Valve relief notch dimensions differ than that of the 1698cc conversion. these are as follows:
INTAKE VALVE
Cutter size 1.875" OD with 3/64" radius, whose center line is measured at 2.625" from the spark plug side of the cylinder block. Machine to a width of .135" and to a depth of .150".
EXHAUST VALVE
Cutter size 1.75" OD with 3/64" radius, whose center line is as above. Machine to a width of .285" and to a depth of .150".
Information on cylinder head replacement can also be found on technical articles MGA3 and MGB25.
ORDER FORM FOR CONVERTING TO 1622cc SPECIFICATIONS
From your current Moss Motors MGA parts catalog (MGA21 effective 04/10/00) enter the $amount for the appropriate part number and enter in the $amount column. For British Automotive parts extend the $BA Price to the same column. Change any recommended quantities to the total you require. Discount 10% from your Moss Motors sub total only. NOTE: British Automotive products * are already discounted.
If you do not have a current catalog, you can have one mailed from Moss Motors. Phone 1-800-667-7872.
| Part No | Description & Comments | $BA Price | $ Amount |
| 420-618(std) | 5 Ring Piston set 1622cc | _______ | ________ |
| 420-638(020) | 5 Ring Piston set 1644cc | _______ | ________ |
| 420-648(030) | 5 Ring Piston set 1655cc | _______ | ________ |
| 420-658(040) | 5 Ring Piston set 1666cc | _______ | ________ |
| -------------------------------------------------------------------------------------------- | |||
| 25-550 | Thrust washer set (std) | _______ | ________ |
| If crankshaft end float is greater than specified order oversize | |||
| 425-600 | Thrust washer set .005" | _______ | ________ |
| 425-650 | Thrust washer set .010" | _______ | ________ |
| -------------------------------------------------------------------------------------------- | |||
| 425-700 | Rod Bearing Set (std) | _______ | ________ |
| 425-800 | Rod Bearing Set .010" | _______ | ________ |
| 425-850 | Rod Bearing Set .020" | _______ | ________ |
| 425-900 | Rod Bearing Set .030" | _______ | ________ |
| 425-950 | Rod Bearing Set .040" | _______ | ________ |
| -------------------------------------------------------------------------------------------- | |||
| 425-050 | Main Bearing Set (std) | _______ | ________ |
| 425-100 | Main Bearing Set .010" | _______ | ________ |
| 425-150 | Main Bearing Set .020" | _______ | ________ |
| 425-200 | Main Bearing Set .030" | _______ | ________ |
| 425-250 | Main Bearing Set .040" | _______ | ________ |
| -------------------------------------------------------------------------------------------- | |||
| 451-520 | Crankshaft, new (1500cc & 1600cc) | _______ | ________ |
| We do not supply a reconditioned crankshaft. So, be sure to order the correct sized bearings. | |||
| 425-000 | Cam bearing set | _______ | ________ |
| 460-735 | Oil Pump- late style | _______ | ________ |
| 460-760 | Oil Pump - Strainer | _______ | ________ |
| NOTE: Oil Pump can be modified for increased output. Call "Crowther Racing Engines" @ 707 778 6050. | |||
| 460-155 | Oil pressure relief valve plunger | _______ | ________ |
| 329-210 | Oil pressure relief valve spring | _______ | ________ |
| 329-235 | Oil pressure relief valve spring (Uprated) | _______ | ________ |
| -------------------------------------------------------------------------------------------- | |||
| NV.COVER One piece aluminum side plate cover $56.25 * | ________ | ||
| NOTE: See Web Site www.mgbmga.com Technical article "MGB3" | |||
| -------------------------------------------------------------------------------------------- | |||
| 322-840 | OEM Conrod bolt | _______ x 8 | ________ |
| 460-520 | OEM Conrod locktab | _______ x 4 | ________ |
| 206-6003 | ARP Conrod bolt set (see text) $34.82 * | ________ | |
| 328-930 | Main bearing stud | _______ x 6 | ________ |
| 311-000 | Main bearing nut | _______ x 6 | ________ |
| 200-8637 | ARP Main bearing stud nut $ 1.67 x 6 = * | ________ | |
| 200-8534 | ARP Main bearing stud washer $ 1.49 x 6 = * | ________ | |
| 862-425P | Main bearing bolt $ 1.40 x 6 = * | ________ | |
| NOTE: 862-425P can be used as a substitute for 328-930 stud. Use with 200-8534 washer. | |||
| 322-858 | ARP Cylinder head stud kit | _______ | ________ |
| Torque cylinder head to 60 ft/lb. (CAST IRON "HOT") | |||
| Torque cylinder head to 50 ft/lb. (ALUMINUM "COLD") | |||
| Oil threads with 30W oil. | |||
| (See instructions with head stud kit) | |||
| -------------------------------------------------------------------------------------------- | |||
| 6625075-15 | Reground & nitrided camshaft $189.95 * | ________ | |
| (Duration 215 deg @ 050") | |||
| Above supplied on an exchange basis only | |||
| 2A13/HP | Modified lifter set (short style) $ 59.20 * | ________ | |
| WKN505/2468 | Offset camshaft key (246 or 8 deg) $ 11.25 (each)* | ________ | |
| We use the 8 degree key most of the time. Please specify | |||
| 460-550 | Camshaft nut securing lockplate | _______ | ________ |
| 469-560 | Timing chain tensioner | _______ | ________ |
| 460-570 | Timing chain lockplate | _______ | ________ |
| -------------------------------------------------------------------------------------------- | |||
| 460-615 | OEM pushrod (use with 2A13/HP) | _______ x 8 | ________ |
| 2H3357/A | 5/16" Tubular pushrod set (8) $73.20 * | ||
| (See MGB26 "Pushrod Information") | |||
NOTE: To prevent possible 12H3357/A pushrod interference, we recommend boring out the engine block pushrod guide tube holes to .660". Also, if you use British Automotive roller rocker set, you will have to have the cylinder head pushrod guide tubes holes elongated or bored out to the same .660" to prevent the same problem from occurring.
All other engine parts required can be found in the Moss Motors MGA catalog. Please enter below.
| Part No | Description & Comments | $BA Price | $ Amount |
| __________ | ______________________________ | ________ | ________ |
| __________ | ______________________________ | ________ | ________ |
| __________ | ______________________________ | ________ | ________ |
| __________ | ______________________________ | ________ | ________ |
| __________ | ______________________________ | ________ | ________ |
| __________ | ______________________________ | ________ | ________ |
| __________ | ______________________________ | ________ | ________ |
| __________ | ______________________________ | ________ | ________ |
| __________ | ______________________________ | ________ | ________ |
| __________ | ______________________________ | ________ | ________ |
MOSS MOTORS PRODUCTS $_______
LESS 10% (_______)
*BRITISH AUTOMOTIVE PRODUCTS _______
SUB TOTAL _______
CALIFORNIA RESIDENTS ONLY SALES TAX 7.25% _______
TOTAL PARTS _______
SHIPPING/HANDLING _______
TOTAL AMOUNT $_______
Shipping & Handling instructions can be found in your Moss Motors MGA parts catalog. Use this pricing format. All parts will be shipped from
British Automotive FOB Novato.
For security reasons, FAX or MAIL copy of your order to: British Automotive, 21 Pamaron Way, Unit I Novato CA 94949. Phone/Fax 415 883 7200.
MasterCard ( ) Visa ( ) Money Order ( )
Card #__________________Exp.___________
| HOME ADDRESS | SHIP TO ADDRESS |
| Name__________________________ | Name__________________________ |
| Address ____________________________ | Address ____________________________ |
| ____________________________________ | ____________________________________ |
| ____________________________________ | ____________________________________ |
| Phone #’s: (___)_________ (Home) | Phone #’s: (___)_________ (Home) |
| (___)___________ (Work) | (___)___________ (Work) |
| Fax: (___)_________ | Fax: (___)_________ |
| e-mail: _________________________ | e-mail: _________________________ |
RETURN POLICY
All returns must be pre-authorized and freight pre-paid directly to
British Automotive, accompanied by copy of original invoice.
Credits & refunds will be applied as necessary.