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My 1989 z24i HB is very difficult to crank over after it is warmed up. It is fine the first start of the day or whenever it gets a chance to cool down for an hour or so, but if I am out running errands, 15 minutes between stops and starts it won't even spin all the way around. It is like there is too much compression for the starter to overcome. If I keep at it eventually (after about three or four attempts) it will spin and start normally. It had been doing this for about a year, and so I recently replaced the timing set. That fixed a bunch of other problems (chain rattle, etc.) but this one remains. Oil pump timing is dead on, and the crank and cam sprocket marks are as close to aligned at TDC as possible.. ignition timing is 10 degrees BTDC, etc.
I'm kinda stumped. Suggestions?
I'm kinda stumped. Suggestions?