Noisy Comp Cam 850 lifters
03-06-2019, 08:56 PM
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Noisy Comp Cam 850 lifters Finished up my cam/head swap on my 6.0. Ended up going with a xr265hr cam and 706/862 heads. Noisy lifters, not horrible on start up (sounds like very minor exhaust leaks). When the engine is hot, lifters sound like metal on metal, maybe a certain few, have preload set at .075. Running mobil1 10w30. Should i run a 10w40 or even 15w50? Noise is extremely bad at 1300-1600 rpms. After 2500rpms, noise is barely noticeable but could be because exhaust is too loud. Need any opinions of running heaviers oils to quiet new noisy lifters. Engine is not new at 139,000 miles.
03-06-2019, 09:22 PM
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Pushrods are coming up at 7.400. Just used factory pushrods to measeure, come up being exactly what i needed. I’m between 1.5-1.75 turns after no lash to torqued on rocker arm bolt. Within spec as stated by comp cams.
03-06-2019, 10:08 PM
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03-06-2019, 10:11 PM
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for these lifters, yes preload is in spec. Bought the cam, lifters, and springs as a kit from comp cams, followed directions thoroughly as stated by comp cams to clean lifters before install, and changed oil
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03-07-2019, 09:22 AM
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03-07-2019, 09:37 AM
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