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    Help! LT1 Hotcam Install , Valve clatter

    Oil was primed with drill during build. But seems I had a multitude of bad luck on this one. Started with a defective lifter ( or was oil problem what made it go ?) I did use 5w30 Mobil 1 and all the time, even now, the oil pressure is normal. I think that I had a weak link that finally...
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    Help! LT1 Hotcam Install , Valve clatter

    OK , folks here is the result. *&#%$ SPUN Bearing. After all the fus and how it ran so well after the hotcam install, I finally got around to doing what I did not want to do ( I did not want to confirm my worst fears ) anyway, Drained the oil, NICE metallic looking color, removed oil filter...
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    Help! LT1 Hotcam Install , Valve clatter

    Oil pressure is normal. Temps of both coolant and oil are now lower than previous since I installed 160 thermostat. Oil weight is 5w30 Mobile 1, and yes this started after Hotcam install. Though it ran fine for a a few miles. Had a new lifter go bad so I went on my gut and changed that and it...
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    Help! LT1 Hotcam Install , Valve clatter

    What do you think about the fuel injector being pulled and hearing the knock at idle ?
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    Help! LT1 Hotcam Install , Valve clatter

    Definately NOT gas or PCM tune. Definately mechanical noise. Seems to be coming from same problem cyclinder #8. No noise when cold, only once warms up and only starts around 1500 and up. I disconnected electrical to injector #8 and noise can then be heard ay idle. Any ideas ?
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    Help! LT1 Hotcam Install , Valve clatter

    Part 2, After another 100 miles. I romped down on it and the ticking came back. I could tell though it was from a differant lifter. Decided what the heck and drove around a little and romped on her again. TADA the ticking went away. Seems this time for good as more hard driving couldn't get it...
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    Help! LT1 Hotcam Install , Valve clatter

    OK folks here is the outcome. 1st, thanks to everyone for your input. It was most valuable. Yep, It was the lifter. I installed 2 new GMPP roller lifters in cylinder #8. I certainly love not draining the coolant to replace these on the LT1. Put it all back together. And TADA, No more...
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    Help! LT1 Hotcam Install , Valve clatter

    OK, covers off. I cranked engine cold and the ticking seem to come from #8 exhaust. Also it was pumping oil back to the Mid East. All the others had the normal dribble. So I proceeded to remove intake etc. Once in I took off #8 cylinder rocker, pushrod and lifter. I did notice a sharp burr...
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    Help! LT1 Hotcam Install , Valve clatter

    All springs are good. No broken ones. Seems like lockdown nut is awefull close to top edge of rocker. Coukd some interference be cause for noise here ? Also can a rocker seat be installed upside down, the part that sits on stud ?
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    Help! LT1 Hotcam Install , Valve clatter

    Also by the way , the springs came with the kit and are new.
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    Help! LT1 Hotcam Install , Valve clatter

    Havn't checked valve spring yet, will do so tomorrow. Hope it is not a bad lifter. What a pain that will be. If it were a bad spring, wouldn't it make noise all the time. ? As for hot valve set, seems that was when noise was worst.
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    Help! LT1 Hotcam Install , Valve clatter

    OK, folks help me out here. I just installed a new GMPP Lt4 Hot cam kit in my 96 LT1. All was well. I took my time and installed the new GMPP LT4 hotcam, kit came with lifters and lifter tray, and 1.6 roller rockers. I used my original push rods, all checked ok installed a new LT4 HD timing...
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    affordable performance

    Change the rear gear, you will feel like you added 200 hp while leaving eveything in the engine bay stock.
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    Question: accel opti ?

    Works perfect, no problems. Mine is less than a year but like the OE opti it should last as least 100k. I expect better as it is an upgrade over OE.
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    Replacement Opti

    I recently split the diff between GM and MSD and went with Accel via Summit. Works great , fully vented and no problems at all.
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