11-30-2006, 10:54 AM
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Engine Treatments or not?
I now have 90k miles on my 2000z. It seems to have a knock when I start it up after it has been sitting for awhile. I was wondering would it hurt to use some engine treatment and maybe use some injector clearner?
Thanks
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My only picture so far... Cell phone ftw. MODS: Stock  
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11-30-2006, 11:27 AM
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You could but I don't think it would cure the problem.
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Brandon  1996 Z28 LT1, Cosca Exhaust Twin Pro Series 3.5tips, Slp fan control switch, BMR lower tubular arms, BMR standard ajustible Panhard Rods, Slp subframe connectors, Tubular shock tower brace, LPE Cold air Intake, PCMforless, Delco Platinum Plugs, Delco Opti
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11-30-2006, 04:59 PM
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you could go to sears and get their system cleaner..it cleans the crankcase and they pressure the fuel system to clean...might help
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12-06-2006, 09:22 PM
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It sounds like a lifter... That is VERY common in high Mileage LS1 i have a 2000 w/ 108 on the clock and it has the same noise... But once it warms up it goes away right?
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12-07-2006, 01:55 AM
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Sounds like valvetrain noise. Its normal on these roller motors, my Dad's 02 SS did it even at 7,000miles, and his truck (8.1) does it. Until they warm up. My 01 did it, but my 98 does not do it? it must be oddball.
Run a heavier weight oil and see if that helps.
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James A few f body's and a suburban
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12-07-2006, 10:06 AM
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I'll try the heavier weight oil on mine....like RPMExpress, I have an 00 with 100K on the clock and the valvetrain is being loud-
RPM, how does yours sound? I'm trying to nail down exactly what mine is, some people have suggested it could be a lifter.
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War is an ugly thing, but not the ugliest of things. The decayed and degraded state of moral and patriotic feeling which thinks that nothing is worth war is much worse. A man who has nothing for which he is willing to fight: nothing he cares about more than his own personal safety, is a miserable creature who has no chance to be free, unless made and kept so by the exertion of better men than himself.
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12-31-2006, 05:06 PM
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I'm a little late to the party on this but......
A lot of the LS1's seem to have a little piston slap on cold starts. Many folks have reported it and GM has acknowledged it but says it is perfectly normal. The 5w30 oil is really thin when it's cool and that doesn't help either. My 98 does it, has always done it since brand new. It hasn't changed or gotten better/worse in the last 98,000 miles. I would NOT use any oil additives on mine. It's straight 10w30 Mobil One for me since new and it gets changed every 3000 miles.
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01-04-2007, 11:17 AM
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I thought about using some Lucas Oil Stabilizer...i have a friend with a Vette, he swears by it. Not sure how well it'll help our problem though?
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War is an ugly thing, but not the ugliest of things. The decayed and degraded state of moral and patriotic feeling which thinks that nothing is worth war is much worse. A man who has nothing for which he is willing to fight: nothing he cares about more than his own personal safety, is a miserable creature who has no chance to be free, unless made and kept so by the exertion of better men than himself.
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01-04-2007, 08:37 PM
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Quote:
but be aware that the thicker the oil, the more problems youll have starting and risking more in the cold, the reason 5 w 30 is standard is because it performs well in a wider range of temperatures compared to the heaview thicker 10w30
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2002 onyx black Z28 m6 SS style ram air hood, free ram air mod, slp lid, k&n filter, granatelli maf, smooth bellows slp cai, slp y pipe,skip shift eliminator,corsa catback,STB,sfc's granatelli tunnel brace w/shaft loop,clear corners,granatelli ignition wires waiting to go in: fan switch,grantelli rear lca's,relocation brackets, ,Hotchkis STB,A pillar tripple guage pod, , new iridium plugs Dyno-http://www.z28.com/forum/showthread.php?t=88727 2002 NBM coupe z28 -dead
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