Engine Build Specifications
3ltr (2994cc) Displacement Nissan L-Series
Custom Port and Polished Nissan N42 Head
Supertech Undercut Stem Intake Valves
Nissan OEM Exhaust Valvles
Rebello Racing Outer Valve Springs
Rebello Racing 279-.540 63DI 109 Hot B Camshaft
Rebello Billet Spray Bar
Custom Modified Nissan F54 Block
88.5mm JE Forged Pistons
Plasma Moly Rings
Forged H-Beam Eagle Rods
Clevitte Tri-Metal Main Bearings
King Racing XP Coated Rod Bearings
Stroked and Nitrided L28 P3040 Nissan Crankshaft
Cometic MLS Head Gasket
Rebello-BHJ Competition Dampener
Ported Nissan E88 Intake
Hitachi SU Carburetors with ZTherapy Nozzles and Needles
Nissan High Flow Turbo Oil Pump
Arizona Z Car Cast Aluminum Oil Pan
Datsun-Zstory Stainless Steel Race Header, Main Pipes and Street Muffler
Engine Build Articles
Featured
Cylinder Head Video Series
Part of the Engine Build series this video provides and overview on the modification of the combustion chambers. Here we discuss the issues with the cylinder head and provide details on how to smooth the valve seat transitions, unshroud the valves and remove any hot spots.
N42 Head modifications. Got the new gasket and now time to do the final match intake port matching. Using the already ported intake and gasket inspect the ports to see there are no protruding edges preventing smooth flow. Mark with a sharpie or scribe any areas that need to be removed.
After coarse shaping of the chambers needed to CC them to see if they are balanced before polishing. Datsun L28 F54 block with N42 head. Goal is to get all chambers matched to within 0.25cc.
With the chambers CC'd and course cutting done with carbide burrs now it is time to do the fine shaping and try to match the volume in each chamber. Use an old head gasket to protect the deck surface. I used some old valves with the bottoms ground done to allow access to the edges but still protect the valve seat.
With the chambers measured time to do any last minute matching and begin the finishing process prior to polishing. The steps used are 120 grit flap wheel, 180 grit buff, 280 grit buff and 320 grit buff. On each grit make sure the fine scratches are gone before proceeding to the next grit.
After 80 & 120 grit flap wheels sanding, the chambers needed CC'ing to see if they are now balanced before polishing. Datsun L28 F54 block with N42 head. Goal is to get all chambers matched to within 0.25cc.
With the chambers matched time for the polishing. The steps used were 400 grit, 600 grit followed by white rouge and felt polishing wheels. On each grit make sure the fine scratches are gone before proceeding to the next grit. Make two passes perpendicular to each other to remove the fine scratches from the last grit and get shiny polish.
N42 Head modifications. Cleaning the threads and passages on the head after machining, porting and polishing. Re-tapping the threads for the intake and exhaust manifolds is useful to ensure correct torquing and prevent the studs from seizing in the head. Use an intake/exhaust stud to check for smooth threads and proper seating.
Engine Block Modifications
Painting the cast iron engine block will protect it from rust. With all the modifications, preparations and upgrades complete on the engine block it was time to get rid of that horrible looking outer surface and give it a fresh coat of paint.
We go through the process of balancing the Piston Assemblies to get them ready for the Datsun Engine Build. We start by weighing the various components (Pistons, Gudgeon Pins, Locking Rings and Piston Rings) and then mixing and matching them to get a more even weight distribution.
As part of the Datsun 240z Engine Build series we go through matching and gapping the piston rings to each cylinder bore. We detail the overall process including avoiding some of the common issues and pitfalls. We discuss piston ring orientation, measuring the gaps and then how to file the piston rings to meet the required specification.
As part of the Datsun 240z Engine Build series we go through the parts we received from Rebello Racing for their 3.0 Liter L-Series engine build kit. We show and discuss the parts and then go over the necessary steps and modifications we need to make in the journey to assembling the engine.
We update the status of the Datsun Engine Block after getting it back from the machine shop. A quick overview of the work we did prior to the machine shop and then details of all the work we had done at the machine.
The next step in our Datsun Engine build series to clean out all the old rust, grinding dust, grease, oil and grime that has built up from the previous work. We spray the block down with degreaser multiple times. Scrub the block surface, water and oil passage and then hose it down.
We return to the Datsun Engine build. With the block back from the machine shop it is time to clean off all the old rust and paint. We use a combination of sand papers, flap wheels and brushes. As we remove material we vacuum up the dust and rust getting the block ready for cleaning.