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Message: [QUOTE="vanderchevy18, post: 101102, member: 569"] This thread will discuss the how to of installing Comp910-16 valve springs. This does not discuss the very important part of ensuring correct installed height. I will let TARM either add to this thread with that, or start a new thread on it. He has done it so many times, I couldn't be near as eloquent. Lol! I am using .030 shims in this just to show the mechanics of it. This is under the understanding you already have everything removed including the injectors. First ensure the cylinder you are working on is at top dead center. You can do this by using either a bendy straw, or other plastic probe long enough to slide into the injector cup, to gauge the position of the piston. I say plastic because a coat hanger or other metal probe may score the brass injector cup. Put the straw into the cylinder (provided its long enough. You may need a second person to hold it while you turn the motor over) Now put a socket on the crank and turn the motor over slowly by hand until the piston reaches the top of the cylinder. Move the straw up and down slightly while doing this so the straw does not get bound up. Now remove the rocker arms using a 5/16" socket. Then pull the push rods if you are replacing them with aftermarket rods. [ATTACH=full]68082[/ATTACH] You will need a valve spring compressor to go on. I have this type shown below. It will need the bolt cut in half and a nut welded to the end as shown. I regularly loan mine out if you need one. [ATTACH=full]68083[/ATTACH] Put the compressor on the spring and tighten it down. [ATTACH=full]68084[/ATTACH] Once it is compressed the two keepers will come out. The best thing to do is use a telescopic magnet to get them out as you push the spring down. [ATTACH=full]68085[/ATTACH] [ATTACH=full]68086[/ATTACH] [ATTACH=full]68087[/ATTACH] Then just slide the compressor and spring off. Then pull the valve seal off. Under the seal you will put the CORRECT shim. [ATTACH=full]68088[/ATTACH] Ensure the shim is completely seated. There are ridges around it where the factory machined the seat. It must fully seat onto the machined surface. Then replace the valve seal. You may have to pull up on the valve while pushing on the seal to move on to the next step. [ATTACH=full]68089[/ATTACH] [ATTACH=full]68090[/ATTACH] Next compress the new comp910-16 valve spring with the spring head on. [ATTACH=full]68091[/ATTACH] [ATTACH=full]68092[/ATTACH] Now insert the spring onto the valve. [ATTACH=full]68093[/ATTACH] Now reinstall the keepers. They're kinda fiddly little things so it is a good idea to put a rag behind the spring in case you drop one. Install them as they came out and release the tension on the spring. [ATTACH=full]68094[/ATTACH] [ATTACH=full]68095[/ATTACH] [ATTACH=full]68096[/ATTACH] Now install your new pushrods if you are upgrading them as well. Ensure they slip down into the bowl if the lifter. You will feel it go in. Now reinstall the rocker arms and torque to 15#. Reinstall the injector and the rest of the parts you removed. All done! P.s. don't forget to repeat the process for finding top dead center of each cylinder before removing that cylinder's valve springs. We don't want any valves falling into the cylinder. Also, to get the rear valvesprings out, you may need to jack the engine up. Just as in the head stud how to, remove the motor mounts and jack up one side using a 2x4 to reach the exhaust manifold from the jack. [/QUOTE]