858294T 1 Mercury PISTON

Introduction
This publication has been created in order to establish the proper procedure for converting the oil supply line for the VVA on C15 On-highway Engines.Disassembly
Illustration 1 g01848002
Engine oil lines group (1) 033-6027 O-Ring Seal (2) 6K-3607 Connector (3) 202-2762 Clip (4) 235-1995 Hose As (5) 202-2762 Clip (6) 0S-0509 Bolt (7) 9X-6458 Hard Washer (8) 232-4937 Check Valve
Remove the following items and discard the items: hose (4), clips (3), clip (5), check valve (8), bolt (6) and washer (7) .
Illustration 2 g01848060
(9) Bolt
Remove bolt (9) from the lifting eye and discard the bolt. Refer to Illustration 2 for the location of the bolt.
Remove connector (2) from the valve cover base and save the connector. The connector will be reinstalled with the new 340-1286 Hose As .Assembly
Illustration 3 g01856253
Rear view with lifting eye (1) New 033-6027 O-Ring Seal (2) New 286-9133 Check Valve As (3) New 112-4387 Elbow (4) New 346-0344 Bushing (5) New 0S-1591 Bolt (6) New 344-1950 Clip and 344-1951 Clip (7) New 340-1286 Hose As (8) 6K-3607 Connector (9) New 033-6027 O-Ring Seal (10) 237-2849 Tee
Illustration 4 g01895055
(11) Bracket for the exhaust
If the bracket for the exhaust is present, loosen the C-clamp that is holding the exhaust pipe to the bracket.
Remove one of the bolts that are holding the bracket to the engine and save the bolt. Loosen the other bolt.
For all engines, use the connector (8) that was removed from the back of the cylinder head in Step 12 above. By using a new O-ring seal (1), install connector (8) into tee (10) .
By using a new O-ring seal (1), install check valve assembly (2) into the valve cover base.
Install elbow (3) onto check valve assembly (2) .
Attach clips (6) to hose assembly (7) with the curved half of the clip toward the engine. Tie the loose ends of the clips in order to hold the clips together during the assembly to the engine.
Attach hose assembly (7) to connector (8). Then, attach hose assembly (7) to elbow (3). Hand tighten the hose assembly.
If the lifting eye is installed, use bolt (5) and attach clips (6) with bushing (4) between the clips and the lifting eye.
If the lifting eye is not installed, use bolt (5) and attach clips (6) with 054-6233 Spacer in place of bushing (4) between the clips and the back of the cylinder head.
Tighten both ends of the hose assembly that was installed in Step 7. Tighten the fitting at elbow (3) first.
If the bracket for the exhaust is present and the bracket interferes with the newly installed hose assembly, insert one 7X-0507 Hard Washer between the bracket and the engine and install the bolt that was removed in Step 2.Note: Additional washers may be needed to eliminate interference between the line and the bracket.
Remove the other bolt that is holding the bracket to the engine, and install a 7X-0507 Hard Washer .Note: Additional washers may be needed to eliminate interference between the line and the bracket.
Tighten the C-clamp to the bracket for the exhaust.Refer to Table 1 for a listing of the parts that are needed in order to convert to the new 340-1286 Hose As .
Table 1
Part number     Description     Quantity    
340-1286     Hose As     1    
033-6027     O-Ring Seal     2    
286-9133     Check Valve As     1    
112-4387     Elbow     1    
0S-1591     Bolt     1    
344-1950     Clip     1    
344-1951     Clip     1    Note: The two 7X-0507 Hard Washers are typically needed for Kenworth T2 and T8 trucks.