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“With [Engine] Pack 25, you will attach the Guide Plates and the Push Rod to the Engine parts you have built so far.”
The Guide Plates
Fit the locating pin of the Guide Plate B Part into the matching alignment hole of Guide Plate B, align the screw hole, and secure these parts together with one (1) MP screw:
Slide the Guide Plate D Spring onto the shorter end of the Push Rod, as shown:
Fit this Push Rod assembly into the slot of the Lower Push Rod Seat, as shown.
You may need to slightly compress the spring to get these parts to fit together correctly:
Fit the Upper Push Rod Seat onto the Lower Push Rod Seat, align the holes, and capture the Push Rod assembly in between.
Retrieve your engine assembly from the previous pack. While holding this Push Rod Seat assembly together, fit it to this location on the Timing Chain Case and secure it into place with two (2) KM screws.
This is your friendly reminder to try using 3-in-One Oil on all screws going into metal:
Fit hole of the Guide Plate B assembly (from Step 01) onto the post at this location of the Timing Chain Case and secure it into place with one (1) DM screw.
The upper tip of this Guide Plate B assembly should be fitted between the Push Rod and the Primary Timing Chain, as shown. Do not over-tighten this screw as the Guide Plate B should be able to pivot about the post:
Fit the Guide Plate C to this location on the Timing Chain Case, behind the Primary Timing Chain, and secure it into place with two (2) MM screws as shown:
Slide the Push Rod Spring onto the large round post of Guide Plate D.
One ‘leg’ of the Push Rod Spring should be fitted inside the Guide Plate D, as shown:
Fit this Guide Plate D assembly to this post of the Timing Chain Case, and secure it into place with one (1) NM screw.
The Primary Timing Chain should be routed to the left of Guide Plate D, along the curved surface as shown:
Bend the free end of the Push Rod Spring down and to the left (arrow below) and keep it in place with one (1) NM screw, as shown:
Fit Guide Plate A to the top of the Timing Chain Case and secure it into place with two (2) TM screws.
The flat side of Guide Plate A should be at the top, and the Primary Timing Chain should run beneath it, as shown:
With these Guide Plates now secured to the engine, the slack in our Primary Timing Chain has been reduced to practically zero!
Engine 26 – Front Timing Chain Case, Crankshaft Pulley, Camshaft Sprocket Cover