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Message: [QUOTE="kleake, post: 1400070, member: 25987"] Rocker spacer is correct, even if it wasn't it wouldn't be allowing the rockers to pull down too close to the head causing this, it would actually push the opposite and make them loose. When I moved the rockers to other cyl I wasn't completely accurate for 2 reasons. 1. the amount of compression did change, but only a slight amount. 2. When I said that the previously good cyl now had 0 compression, after it sat overnight that compression did come up to about 200. The reason for this is the lifter had time to compress and get all of it's oil out. I realized this on some of the others too so I redid my test. Torque the rockers down, bump it over until the cam is opening a valve, let it sit for about 30 seconds, then do the other valve. Compression then comes up as far as it's going to go. So in the end, the issue was still present in all cyl, however some worse than others. 6.0 Tech, I agree with you when you are measuring for spring installed height, but i'm not 100% sure when it comes to stem height. I know I have read a couple of places that say to measure from the OEM casting without any shims, but I don't know if the stem seal in this case qualifies as a "shim" or the OEM spring surface. [/QUOTE]

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