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10-20-2013, 03:15 PM
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#61
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Senior Member
Join Date: Jun 2008
Posts: 624
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LS motors are known for having that play on the rockers. What you dont want is play up n down. These cars have noisy valvetrains as it is.
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10-20-2013, 03:17 PM
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#62
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Senior Member
Join Date: Jun 2008
Posts: 624
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Dont go too thick on oil or youll starve the top end on startup especially. I run rotella t6 5w40. Great stuff on the track too.
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10-20-2013, 03:17 PM
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#63
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by enkeivette
You should fab your own headers also, just buy a kit, tacky tacky, pull them out and finish up the seams. Then you will forever be the go-to header guy.
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Ha! No, I'll just hire Jammer98 when the time comes. I may do the rockers/lifters myself for the experience, but that's about it.
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10-20-2013, 03:19 PM
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#64
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by C5Natie
Dont go too thick on oil or youll starve the top end on startup especially. I run rotella t6 5w40. Great stuff on the track too.
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I used to run Rotella 15/45 (a lot of older Vette dudes run it in Gen I SBCs), which worked fine really other than maybe a tiny loss in power, but it was quieter overall. Now it has either 5/20 or 5/30 AMSOIl.
Anyway, Guy clearly said the rocker play is fine, the ticking is cam knock, and that's not *that* big of a deal, i.e., no potential for catastrophic engine failure. But the German in me cannot tolerate something that is not basically working properly, so it waits other than enough little driving to keep everything lubed and gas circulating. Reminds me though, I'll put some stabilizer in the tank.
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10-20-2013, 04:26 PM
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#65
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Senior Member
Join Date: Jun 2008
Posts: 624
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These cars are also known to eat up cam lobes so just keep your eye on things.
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10-20-2013, 06:40 PM
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#66
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by C5Natie
These cars are also known to eat up cam lobes so just keep your eye on things.
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I have heard of spring breaking and personally experienced that too. This cam knock seems to be a kind of common problem, but haven't heard of lobe-munching. What's the reason? Insufficient oiling in stock configuration for those who drive a bit harder?
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10-20-2013, 06:50 PM
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#67
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Quote:
Originally Posted by Vettezuki
I have heard of spring breaking and personally experienced that too. This cam knock seems to be a kind of common problem, but haven't heard of lobe-munching. What's the reason? Insufficient oiling in stock configuration for those who drive a bit harder?
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From what ive seen and experienced the usual causes are either not enough spring pressure causing valvefloat or a failing roller on a lifter. Add the fact also that todays oils dont have much zinc, which why I use either rotella or red line break in additive. Also ive seen cams that weren't heat treated properly. LS motors are hard on cam bearings too. A lot of times oil pressure issues are associated with worn cam bearings and most guys always think its the mains or oil pump. Once in the past I was getting some ticking on my LS6 and I ran seafoam in the oil for about 150mi and then ran rotella. Didnt hear it again so you never know. Ive seen the atf trick work on higher mile vehicles too.
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10-20-2013, 06:59 PM
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#68
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10-20-2013, 07:02 PM
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#69
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I also broke a valvespring first. Just replaced the spring, rocker and lifter. Cam looked ok but a few months later thats what killed my motor. Cam lobe must have got damaged. Ate the new lifter the lobe got destroyed and the shavings killed my main bearings. If I broke a valve spring now I'd be nervous and check the lifter. Id replace the cam if the lifter roller has even slight abnormal wear, but thats just me.
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10-20-2013, 09:26 PM
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#70
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I, Vettezuki
Join Date: Feb 2006
Posts: 14,754
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Quote:
Originally Posted by C5Natie
From what ive seen and experienced the usual causes are either not enough spring pressure causing valvefloat or a failing roller on a lifter. Add the fact also that todays oils dont have much zinc, which why I use either rotella or red line break in additive. Also ive seen cams that weren't heat treated properly. LS motors are hard on cam bearings too. A lot of times oil pressure issues are associated with worn cam bearings and most guys always think its the mains or oil pump. Once in the past I was getting some ticking on my LS6 and I ran seafoam in the oil for about 150mi and then ran rotella. Didnt hear it again so you never know. Ive seen the atf trick work on higher mile vehicles too.
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LS1Z28 mentioned running Sea Foam too, then changing the oil. How much did you put in?
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