Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
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Ok guys i need a little help here. Ive heard what sounds kinda like a rattling (metal), coming from the drivers side of my engine bay. so i decided to pull off that valve cover. I dont really know too much about adjusting rockers but you couldnt lift the rocker off of the valve head, but you could rotate it from side to side. almost enough that the roller from the rocker comes off the top of the valve. I would say total play side to side was 1/4 inch. Would this be causing the rattling sound i heard? If so how to i take that play out?
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383ci w/ hyper pistons 10:1, Eagle cast crank, PM rods with ARP bolts, Aluminum heads with 190cc intake runners, 3 angle valve job, 2.02/1.6 valves, Edelbrock 7102 Performer RPM Camshaft & Lifters .488/.510 - 234/244 - 117, Edelbrock 7101 Intake with holley 750 DP street HP Carb, Complete MSD ignition 85551 Distributor, 6430 box, blaster coil and 8.5mm wires.
Could be. What heads? You need a way to keep the pushrod and rocker in line, whether it is slots in the head (a factory thing on most of our heads) or a guideplate, or self aligning rockers that have lips on the valve tip side but sounds like you do not have self aligning rockers on there so you need either the slot or a guideplate or there's a big problem.
the heads have guide plates on them. i went by my machine shop and he said i maybe able to move them a little if there in "neutral position" having to do with the cam not the transmission lol. sorry i dont know the correct word to use there. He said the rockers may need to be readjusted. They havent been readjusted since the motor was first fired, and ive got 1k-2k miles on it now.
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383ci w/ hyper pistons 10:1, Eagle cast crank, PM rods with ARP bolts, Aluminum heads with 190cc intake runners, 3 angle valve job, 2.02/1.6 valves, Edelbrock 7102 Performer RPM Camshaft & Lifters .488/.510 - 234/244 - 117, Edelbrock 7101 Intake with holley 750 DP street HP Carb, Complete MSD ignition 85551 Distributor, 6430 box, blaster coil and 8.5mm wires.
Sounds like you just need to torque them down. A torque wrench would be handy so you don't over tighten them. It might seem a bit technical but do your googling on how to tighten rocker arms, read more than one article just to be sure that everyone is on the same page. Check out this page for a quick reference. Also you might just want to get a haynes book on your model. They do have some good references in them, then other times it just seems like the book of the devil... lol
