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Showing results for tags 'valve train check up'.
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My Z finally hit 10k miles since the head rebuild, so I decided to give the valve train a check up.. N42, mild port n polish, stock deck height, Delta camshaft regrind on stock F / E30 solid cam, 280deg @ .480 lift measured at the lash pad. #160 lash pads. Stock spray bar. custom ss valves and seats, stock valve springs, guides, re-surfaced rockers from Delta, stock cam gear/chain/guides, cam chain/gear set on #2 hole. Ran 30w dino oil for 500 miles. Re-set rocker arm to lash pad clearance to 0.08 inch, ran another 500 miles on 30w oil. Re-set valve clearance to 0.08 inch on a hot engine, changed oil to Mobil-1 0w30 full synthetic, now at 10,000 miles. Checked the rocker arm to lash pad clearance and found 1 tight valve, #4 exhaust was at 0.07 inch. All others were where I set them, 0.08 inch clearance between the rocker arm to lash pad, with a hot engine. I noticed that the rocker to lobe wipe pattern is slightly off center on a few of the lobes, but only about 0.15 inch. Its not perfect, but I'm ok with that small of an off-set on the wipe patterns...
