Hipster
I'm Awesome
bent puhrod indicates contact of some sort, whether valve spring coil bind, guide to retainer clearance, or a valve hit piston and created a bent valve. Valve lash settings and clearances are critical and when you get into aftermarket cams the service manual doesn't really apply. You have to go by what the lifter manufacture says, check clearances on everything etc., and most hydraulic lifters will call for .030-.060 preload. Most list lifter preload specs on their website. You can get very technical with this as I have in certain applications with a dial indicator and measure preload.
You didn't say but it's also critical to have the correct valve springs installed on the engine as well.
You didn't say but it's also critical to have the correct valve springs installed on the engine as well.
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