Every now and then you may find yourself dealing with a machine shop that has
never heard of a Datsun Roadster or that doesn't have access to all the
detailed information about the dimensions. Here are some diagrams from the factory
service manual that might help. Print them out and take them in to the machine shop
with your parts.
U20 Engine
Tightening sequence for head bolts.
Where to measure the piston for diameter.
Where to measure the cylinder bore.
Standard dimensions for crank journals.
Cross-section of the ports.
Cross-section of the combustion chamber.
Valve dimensions.
Valve seat dimensions.
This diagram shows the flow paths of the lubrication system.
R16 Engine
Not too many diagrams available for the R16 specifically,
but the piston and cylinder bore data should be the same.
Where to measure the piston for diameter.
Where to measure the cylinder bore.
Shows both the 3-main and 5-main crankshafts.
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