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What do you torque the rocker arms to when you replace push-rods on a 1987 5.0 Mustang?
Wiki User
∙ 12y ago
you don't really torque them, you tighten little by little as you shake them up and down until they are snug, the tighten just a little more, too much will leave you with bent pushrods
AnswerActuall, the 87 uses hydrolic roller lifters, so the procedure would be to just tighten them down. I believe that the torque spec is something like 24 ft. lbs. (you should look it up).Dont just tighten them down until the pushrods appear to be tight (as described in the first answer) or the nuts may back out and you will have big problems. Unless you have changed pushrod length or installed aftermarket rocker arms. If this is the case, you may need to purchase shims to maintain the proper rocker arm geometry.
Wiki User
∙ 12y ago
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Well...kind of. There's a recess in the cam follower (which is way inside your engine) that accepts one end of the pushrod and a recess in the rocker that accepts the other end. Pushrods are the same at both ends. So... Start by rolling the pushrod on a flat surface. If it won't roll, it's bent and you need a new one. Stick the pushrods into their holes, then install and torque the rocker arm. Adjust your valves, install the valve cover and you're done.
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You will have to remove the pushrods, and there are two ways to do it. Lisle makes a pushrod tool specifically for 3100 and 3400 gm engines which tips the rockers far enough away from the pushrods so they can be removed, or you can just loosen the rockers up enough until the pushrods are able to come out. I would recommend buying the tool and removing the pushrods that way though because otherwise you will have to loosen and retighten the rocker bolts which have a few different torque specifications. They have revised their specs on rocker torque i think a couple of times, and i have seen a lot of rockers which people have pulled the threads right out when tightening the rockers too hard so if you do take the rockers off, i would take a 3/8 ratchet and get it good and snug. Do not reef on it just get it good and snug. The tool is neat though because it acts as a lever and pulls on the bottom side of the rocker on one side and pushes on the top of the other side and you can pull the pushrods right out and then you don't have to worry about anything. The tool is inexpensive too, maybe 15-20 dollars i think. I hope this information helps You will have to remove the pushrods, and there are two ways to do it. Lisle makes a pushrod tool specifically for 3100 and 3400 gm engines which tips the rockers far enough away from the pushrods so they can be removed, or you can just loosen the rockers up enough until the pushrods are able to come out. I would recommend buying the tool and removing the pushrods that way though because otherwise you will have to loosen and retighten the rocker bolts which have a few different torque specifications. They have revised their specs on rocker torque i think a couple of times, and i have seen a lot of rockers which people have pulled the threads right out when tightening the rockers too hard so if you do take the rockers off, i would take a 3/8 ratchet and get it good and snug. Do not reef on it just get it good and snug. The tool is neat though because it acts as a lever and pulls on the bottom side of the rocker on one side and pushes on the top of the other side and you can pull the pushrods right out and then you don't have to worry about anything. The tool is inexpensive too, maybe 15-20 dollars i think. I hope this information helps You will have to remove the pushrods, and there are two ways to do it. Lisle makes a pushrod tool specifically for 3100 and 3400 gm engines which tips the rockers far enough away from the pushrods so they can be removed, or you can just loosen the rockers up enough until the pushrods are able to come out. I would recommend buying the tool and removing the pushrods that way though because otherwise you will have to loosen and retighten the rocker bolts which have a few different torque specifications. They have revised their specs on rocker torque i think a couple of times, and i have seen a lot of rockers which people have pulled the threads right out when tightening the rockers too hard so if you do take the rockers off, i would take a 3/8 ratchet and get it good and snug. Do not reef on it just get it good and snug. The tool is neat though because it acts as a lever and pulls on the bottom side of the rocker on one side and pushes on the top of the other side and you can pull the pushrods right out and then you don't have to worry about anything. The tool is inexpensive too, maybe 15-20 dollars i think. I hope this information helps You will have to remove the pushrods, and there are two ways to do it. Lisle makes a pushrod tool specifically for 3100 and 3400 gm engines which tips the rockers far enough away from the pushrods so they can be removed, or you can just loosen the rockers up enough until the pushrods are able to come out. I would recommend buying the tool and removing the pushrods that way though because otherwise you will have to loosen and retighten the rocker bolts which have a few different torque specifications. They have revised their specs on rocker torque i think a couple of times, and i have seen a lot of rockers which people have pulled the threads right out when tightening the rockers too hard so if you do take the rockers off, i would take a 3/8 ratchet and get it good and snug. Do not reef on it just get it good and snug. The tool is neat though because it acts as a lever and pulls on the bottom side of the rocker on one side and pushes on the top of the other side and you can pull the pushrods right out and then you don't have to worry about anything. The tool is inexpensive too, maybe 15-20 dollars i think. I hope this information helps
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