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Old 11-08-2007, 05:52 PM
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Pushrods rub

my machinist assembled my cylinder heads and when the heads are installed on the block, one of the pushrods goes through the guideplate and the hits the radius cut in the cylinder head, where the pushrod goes down through. I am able to guide the other end of the pushrod down to the cup of the lifter but it has a lot of tension with the cylinder head surface. Can i try to loosen the studs holding the guideplate on and shift it? or doesnt it work like that? And is there any way that I could have the wrong head on the wrong side? I was pretty sure they are meant to be identical, right? Oh, and maybe half of the pushrods aren't perfectly vertical when installed, they're at an angle
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Old 11-08-2007, 06:26 PM
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It sounds indeed as if some of your guide plates may need adjusted.
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Old 11-08-2007, 06:38 PM
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I tweaked that one so there's not rubbing but some are still at a little bit of an angle. Should they be perfrectly vertical? And how do I put the rocker arm nuts on? Should I screw them on until I feel the resistance from the hydraulic lifters then stop, then tighten the setscrew in the top? Wat do I torque the setscrew to?
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Old 11-08-2007, 06:51 PM
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do a search here for adjusting rockers. lots of info.
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Old 11-08-2007, 07:37 PM
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I know how to adjust the rockers now, but should the pushrods be at an angle at all?
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Old 11-09-2007, 10:37 AM
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pushrods

One thing you need to look at when you move those guide plates around is how well the roller tip ( if your running a rocker with a roller tip) is centered, front to back on the valve stem tip. I would be more concerned with that. If you get them centered and a pushrod or pushrods hit the head then the head need fixed....


Keith
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Old 11-09-2007, 10:41 AM
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should have drilled the slots in the heads
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Old 11-09-2007, 11:05 AM
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What direction is the angle? Some lifeters are up and some are not. Those that are (assuming your valves are not adjusted) will push the rockers through part of their rotation, leaving the adjusting nuts (or polylocs) higher. This is normal.

If they are at differing angles in the fore-aft direction, I'm not so sure.

Pat
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Old 11-10-2007, 07:43 AM
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what engine ?
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Old 11-10-2007, 12:05 PM
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'89 chevy 350 bored 30 over, built up for maybe 350-400hp
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Old 11-10-2007, 12:25 PM
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What kind of heads?

tom
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Old 11-11-2007, 11:02 AM
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theyre EQ lightning 180cc heads i think CC180BA is the model #
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