0303890 JOHNSON NUT, Acorn

Illustration 1 g02599196
Typical example
(1) Locating pad
The pipe plug at location (2) is installed in the cylinder head for engines with dry exhaust manifolds. If the pipe plug is not installed into the water passage, the coolant will leak and engine damage will result. For engines with dry exhaust manifolds, make sure that the pipe plug is installed.
Illustration 2 g02534738
Typical example (top view)
(3) Pipe plug
Table 1
Specification for 101-0830 Cylinder Head Gp, 299-3521 Cylinder Head Gp, 332-9693 Cylinder Head Gp, 274-8568 Cylinder Head Gp, 317-2441 Cylinder Head Gp, 291-1463 Cylinder Head Gp, 285-3086 Cylinder Head Gp, and 368-9073 Cylinder Head Gp
Item Qty Part Specification Description
3 1 5B-7890 Pipe Plug Before assembly, lubricate the threads of the pipe plug.with 5P-3931 Anti-Seize Compound.
A 1 - Height of the new cylinder head is 142.00 0.15 mm (5.591 0.006 inch).
B 2 3b-0623 Cup Plug Apply Anaerobic Flange Sealant to the bores of the cup plugs before assembly.
Installation depth of plugs from the top surface of the cylinder head is 9.0 0.5 mm (0.35 0.02 inch)
D 2 3b-0623 Cup Plug Apply Anaerobic Flange Sealant to the bores of the cup plugs before assembly.
Installation depth of plugs from the top surface of the cylinder head is 1.0 0.5 mm (0.04 0.02 inch) Bolt Tightening Procedure
The cylinder head bolt tightening procedure depends on which cylinder head gasket is used. Refer to one of the following bolt tightening procedures based on your cylinder head gasket.Bolt Tightening with the 110-6991 Cylinder Head Gasket
Use the following procedure when the 110-6991 Cylinder Head Gasket is installed.
Illustration 3 g02599197
Table 2
Specification for 101-0830 Cylinder Head Gp, 299-3521 Cylinder Head Gp, 332-9693 Cylinder Head Gp, 274-8568 Cylinder Head Gp, 317-2441 Cylinder Head Gp, 291-1463 Cylinder Head Gp, 285-3086 Cylinder Head Gp, and 368-9073 Cylinder Head Gp
Item Qty Part Specification Description
- 6 131-0420 Cylinder Head Fastener Gp 1. Coat the threads of the bolts with clean engine oil.
2. Tighten bolt (1) through bolt (8) in the numerical sequence to 30 5 N m (22 4 lb ft).
3. Tighten bolt (1) through bolt (8) in the numerical sequence to 200 15 N m (150 11 lb ft).
4. Again tighten bolt (1) through bolt (8) in the numerical sequence to 200 15 N m (150 11 lb ft).
5. Turn bolt (1) through bolt (8) in the numerical sequence to an additional rotation of 180 5 degrees.
Tighten bolts (9) and (10) only after bolt (1) through bolt (8) have been given the final torque.
6. Tighten bolts (9) and (10) to 55 10 N m (40 7 lb ft).
2 131-0421 Cylinder Head Fastener Gp
2 5B-0213 Bolt Bolt Tightening with the 362-8264 Cylinder Head Gasket
Use the following procedure when the 362-8264 Cylinder Head Gasket is installed.
Illustration 4 g02599198
Table 3
Specification for 101-0830 Cylinder Head Gp, 299-3521 Cylinder Head Gp, 332-9693 Cylinder Head Gp, 274-8568 Cylinder Head Gp, 317-2441 Cylinder Head Gp, 291-1463 Cylinder Head Gp, 285-3086 Cylinder Head Gp, and 368-9073 Cylinder Head Gp
Item Qty Part Specification Description
- 6 131-0420 Cylinder Head Fastener Gp 1. Coat the threads of the bolts with clean engine oil.
2. Tighten bolt (1) through bolt (8) in the numerical sequence to a torque of 30 5 N m (22 4 lb ft).
3. Tighten bolt (1) through bolt (8) in the numerical sequence to 100 15 N m (75 11 lb ft).
4. Tighten bolt (1) through bolt (8) in the numerical sequence to 450 15 N m (330 11 lb ft).
5. Loosen bolt (1) through bolt (8) in the numerical sequence for an angle of 90 5 degrees.
6. Tighten bolt (1) through bolt (8) in the numerical sequence