thanks for the info, I am off tommorrow afternoon and when I go in to verify pushrod length I will check the springs while I am in there, so how much room should I have inbetween the coils when they are fully compressed?
thanks for the info, I am off tommorrow afternoon and when I go in to verify pushrod length I will check the springs while I am in there, so how much room should I have inbetween the coils when they are fully compressed?
2000 GMC Sierra Z71 6.0 LQ9, Mahle Forged Flatops, Comp 208/212-554/558 115 LSA, LS6 Valvesprings, Harland Sharp Roller Rockers,Trick Flow 7.4 pushrods, NGK TR55 plugs, MSD wires, Melling High Volume/Pressure oil pump,LS7 lifters, Arp main studs-rod bolts-head bolts, Nelson's 93 Octane Tune, rear 02's and Egr Delete, BBK headers ito true 2 3/4 duals w/dual super 40 flowmasters, built 4L60E, Circle-D 3200 stall
When I replaced the lifters in my 4.8L recently, i ran into a problem with a shop not grinding the valve stem tips when they did the valve job.(this is a whole other story that is really bad in its own right) Anyway, most of the lifters clattered like crazy when i got the heads put back on and the engine fired up. I ended up getting a set of .025'' shorter pushrods to solve my problem. After that, the lifters were nice and quiet. So I would check pushrod length, coil bind, and run it with the valve covers off to see if the noise is maybe just the rockers hitting the valve covers. By the way, if you didn't wash the rockers thoroughly with solvent when you got them, they would most likely have Al shavings on them from machining and assembly.
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www.tjc.edu
I've had some valvetrain issues with mine since the cam/spring swap and valve job... Everyonce in a whille i get a certain valvetrain noise that gradually gets louder and louder... then fades out...
stock pushrods
And i've seen guys run LS6 springs with XER lobes (.581 lift).
04 Silverado Z-71 Extended Cab
Magnaflow, 10.4 TV 50 wires, tr-55ix, Synthetics, HID's, JL audio, 33.5", leveling kit, tuned, CAI, vette servo, cam, valve job, pacesetter. 9.3@77.5 and 14.5@93.4
06 2wd
custom cam, tune, 3.73's, servo, HID's, 10.4mm wires, long-tubes, CAI, magnaflow, 2.5" shackles, Circle-D 3200, UD, JL Audio 4.1, Alpine 5ch
Well I measured the pushrods and ended up needing 7.350 length Pushrods so as soon as they get here I will install them with my new computer from Nelsons and hopefully wont have any more problems.....fingers crossed....
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