Mercury MerCruiser D2.8L D-Tronic Service Manual page 266

ENGINE MECHANICAL
15. Temporarily install exhaust manifold without gaskets and FINGER-tighten each nut with
locking washer.
16. Slightly loosen 12 mm and 14 mm bolts as needed, to allow cylinder heads to ALIGN
as you HAND tighten exhaust manifold nuts.
17. HAND TIGHTEN all 14 mm and 12 mm cylinder head bolts in torque sequence.
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SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002