4F and 4G Square Four Top End 1931-48
For gasket sets click here; individual gaskets click here; pistons, rings and liners click here.
A selection of used heads and cylinders are always available.
The outside diameter of all valve guides for the Square Four is 1/2″.
Torque head bolts to 15ft/lbs when using solid copper head gaskets on the 4G, if using Otto gaskets follow the instructions supplied.
Tappet settings inlet/exhaust: – 4G & MK II .006/.008; MK I .001/.001
Our newly manufactured rocker boxes are made in conjuction with the Ariel Owners club.
The new rocker box will come complete with a seal kit. However you can buy the seals individually if required.
Part No. |
Description |
Per |
846-37 |
Rocker box with seal kit & instructions | 1 |
1028-21 |
O ring, 1 inch, for 62-37 push rod tube | 4 |
1031-20 |
Washer, thick steel, rocker box bolt | 4 |
1031-21 |
O ring, 5/16, for 860-37 rocker box bolt & valve guide | 12 |
898-21 |
Grub screw, rocker spindle | 2 |
4F Overhead Cam SQ4 1931-36
Part No. |
Description |
Per |
Years |
48-32 |
Cylinder head | 1 | 1931-36 |
418-31 |
Inlet and exhaust valve | 8 | 1931-36 |
477-32 |
Valve guide, inlet and exhaust | 8 | 1932-36 |
523-31 |
Valve spring, new free length 1.530” | 8 | 1931-36 |
856-31 |
Cam cover | 1 | 1931-36 |
862-32 |
Cam cover retaining nut, stainless | 4 | 1931-36 |
912-31 |
Cam follower, re-profiled to order | 8 | 1931-36 |
936-31 |
Tappet adjusting screw | 8 | 1931-36 |
936A-31 |
Tappet adjuster locknut | 8 | 1931-36 |
979-31 |
Camshaft bearing circlip, drive end | 1 | 1931-36 |
975-31 |
Camshaft bearing, drive end | 1 | 1931-36 |
977-31 |
Cam bearing, distributor end | 1 | 1931-36 |
1030-36 |
Teddy bear casting (cap over end of cam) | 1 | 1936 |
1960-31F |
Camshaft, re-profiled, re-profiled to order | 1 | 1931-32 |
1960-33F |
Camshaft, re-profiled, re-profiled to order | 1 | 1933-36 |
5172-31 |
Rocker and pressure gauge oil feed pipe | 1 | 1931-36 |
4G Overhead Valve SQ4, 1937-48
Part No. |
Description |
Per |
Years |
PACK-ADV-002 |
Valve & guide pack | A | All |
PACK-INTER-002 |
Top end overhaul pack | A | All |
094 |
Exhaust manifold heat shield, screw | 8 | 1937-48 |
094Q |
Exhaust manifold heat shield, screw, stainless steel | 8 | 1937-48 |
0131 |
Exhaust manifold stud, front | 4 | 1937-48 |
0131Q |
Exhaust manifold stud, front, stainless steel | 4 | 1937-48 |
0132 |
Exhaust manifold stud, rear, stainless steel | 4 | 1937-48 |
0135 |
Tappet guide locating plate stud | 2 | 1937-48 |
0198 |
Carburetter mounting stud, left | 1 | 1937-48 |
0199 |
Carburetter mounting stud, right, stainless steel | 1 | 1937-48 |
24-37 |
Cylinder Also known as ‘door stops’ in the trade (More useful for holding the door open) | 1 | 1937-48 |
25-37 |
Cylinder, 600cc | 1 | 1937-40 |
47-37 |
Cylinder head, bare, various conditions | 1 | 1937-48 |
135-37 |
Base nut, extended | 1 | 1937-48 |
171-37 |
Head bolt | 6 | 1937-48 |
171-37Q |
Head bolt, stainless steel | 6 | 1937-48 |
172-37 |
Head bolt, stainless steel | 2 | 1937-48 |
200-37 |
Exhaust manifold | 2 | 1937-48 |
210-37 |
Exhaust manifold nut | 8 | 1937-48 |
210-37Q |
Exhaust manifold nut, stainless steel | 8 | 1937-48 |
212-37 |
Exhaust manifold heat shield, stainless steel | 2 | 1937-48 |
225-37 |
Tappet guide block | 4 | 1937-48 |
230-37 |
Tappet guide locating plate | 2 | 1937-48 |
417-37 |
Inlet valve – 1000cc | 4 | 1937-48 |
418-37 |
Inlet valve – 600cc | 4 | 1937-48 |
455-37 |
Exhaust valve – 1000cc | 4 | 1937-48 |
456-37 |
Exhaust valve – 600cc | 4 | 1937-48 |
477-37 |
Valve guide, inlet and exhaust | 8 | 1937-48 |
523-37 |
Valve spring, outer, new free length 1.750” | 8 | 1937-48 |
540-37 |
Valve spring, new free length 1.500” | 8 | 1937-48 |
565-37 |
Valve spring bottom collar | 8 | 1937-48 |
595-37 |
Valve spring top collar | 8 | 1937-48 |
640-32 |
Split cone (per half) | 16 | 1937-48 |
655-34 |
End cap | 8 | 1937-48 |
846-37 |
Rocker box with seal kit & instructions | 1 | 1937-48 |
856-90 |
Rocker box cover, cooling fins & thicker than original use with 862-90 | 1 | 1937-48 |
860-37 |
Rocker box and cylinder head bolt | 4 | 1937-48 |
862-90 |
Nut, securing 856-90 cover | 4 | 1937-48 |
862-90Q |
Nut, securing 856-90 cover, stainless steel | 4 | 1937-48 |
900-37 |
Rocker spindle nut, stainless steel | 2 | 1937-48 |
903-37 |
Rocker spindle fibre washer | 2 | 1937-48 |
912-37 |
Rocker arm | 8 | 1937-48 |
930-37 |
Lever end pin | 8 | 1937-48 |
936-31 |
Tappet adjusting screw | 8 | 1937-48 |
936A-31 |
Tappet adjuster locknut | 8 | 1937-48 |
945-31 |
Rocker spindle thrust washer | 6 | 1937-48 |
1012-37 |
Oil feed stud for rocker feed pipe | 1 | 1937-48 |
1015-37 |
Rocker oil feed stud and nut, stainless steel | 1 | 1937-48 |
1018-31 |
Dome nut, rocker oil feed on rocker box | 1 | 1937-48 |
1024A-37 |
Throttle cable bracket on carburetter stud, stainless steel | 1 | 1937-48 |
1032-39 |
Value guide rubber washer | 8 | 1937-48 |
1810-37F |
Cam follower (EXCHANGE) | 8 | 1937-48 |
1821-00 |
Tappet cup, new and improved design, prevents push rod wear | 8 | 1937-48 |
1858-37 |
Pushrod | 8 | 1937-48 |
5172-37 |
Rocker and pressure gauge oil feed pipe | 1 | 1937-48 |
5182-37 |
Lower double union on rocker feed pipe | 1 | 1937-48 |
No products were found matching your selection, but we still might be able to help! Give us a call on 01986 894798 or email spares@draganfly.co.uk