rocker arm problem
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I'm not real familiar with the 300-6, but I thought they were shaft style rockers, which shouldn't move side to side without force(springs and washers hold them apart) and they shouldn't twist any.
Movement up/down against pushrods and valve tip, should be minimum if any.
Pull valve cover and check for bent pushrod or see if the lifter is bad and not keeping tension on pushrod.
Movement up/down against pushrods and valve tip, should be minimum if any.
Pull valve cover and check for bent pushrod or see if the lifter is bad and not keeping tension on pushrod.
#3
#4
FYI for you guys, the Ford 300/4.9 does not use shaft style rocker arms. They are either ball and stud or pedestal mount, depending on the year. Most are simply torqued down and that is it for adjustment, although some of the earlier models (carbed) did have adjustable rocker arms. Your engine shouldn't have the adjustable type and more than likely pedestal mount rocker arms.
Does your truck run? When was the last time it was started? If it hasn't been started in a long time, there probably isn't any oil in the lifter and that can be causing the slack you feel. When you go to start the engine for the first time, you need to put about an ounce of Marvel Mystery Oil in each cylinder through the spark plug hole and you really should prime the oil system. This is easily accomplished by removing the distributor and using either a long extension with the oil pump rod at the end and a drill, or an old distributor with the cam gear removed. You'll feel plenty of resistance on the drill when oil has been picked up by the pump and you should let it prime the engine for about 45 seconds to a minute. If you are comfortable doing this, you could even rotate the engine around by hand once the oil has primed to ensure everything is nice a lubricated for when you go to start it. Just make sure to index your starting points on the crank and the distributor before you do any of that. If you decided to turn your engine over once you have prime, you'll need to turn the crank two complete revolutions to get your cam back where it needs to be so you can stab your distributor correctly. Make sure to time the engine with a timing light once it has warmed up.
Does your truck run? When was the last time it was started? If it hasn't been started in a long time, there probably isn't any oil in the lifter and that can be causing the slack you feel. When you go to start the engine for the first time, you need to put about an ounce of Marvel Mystery Oil in each cylinder through the spark plug hole and you really should prime the oil system. This is easily accomplished by removing the distributor and using either a long extension with the oil pump rod at the end and a drill, or an old distributor with the cam gear removed. You'll feel plenty of resistance on the drill when oil has been picked up by the pump and you should let it prime the engine for about 45 seconds to a minute. If you are comfortable doing this, you could even rotate the engine around by hand once the oil has primed to ensure everything is nice a lubricated for when you go to start it. Just make sure to index your starting points on the crank and the distributor before you do any of that. If you decided to turn your engine over once you have prime, you'll need to turn the crank two complete revolutions to get your cam back where it needs to be so you can stab your distributor correctly. Make sure to time the engine with a timing light once it has warmed up.
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Until you take the upper plenum and valve cover off, you aren't going to know what all is wrong. It's possible that it might have backed off and that you just need to torque it back down. That has happened quite a few times to FTE members that I've read about, so you might get lucky. On the other hand, you could need a new pushrod, rocker arm, fulcrum, and lifter. Heck, you could even have a dead lobe on your camshaft.
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