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Senior Member
LS7 Lifters
Wanting to purchase a DOD delete kit for my G8. Only thing holding be back is the comments I see about the LS7 Lifters failing. Could it be the installer or a bad lifter. I know it's man made part and anything can fail. Any feedback will help thanks.
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Beyond Help
things are not what they appear to be.....
2009.5 Liquid Red,Onyx Red, Premium Package, e85 Surprise Package
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VIP Member
Preload is vital. Wouldn't hesitate to use them again.
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2009 PBM G8 GT
Pat G 218/226 & TSP Dual 660s, ARP Bits, DSteck Tuned, Magnacharger Chrome 2300 1:1, RCR Ported/Polished TB, Blower, & L92 Heads w/ LS3 intake valves, Smith Brothers Trunion Bushing Kit, ARH 1 7/8 Magnaflow MidMuff/Solo Axlebacks, RotoFab, VaporWorx PWM 1:1 fuel system, ID1050x injectors
Mike Norris Motorsports Catchcan, AEM 30-4100, JHP Boost/Fuel Gauge Pod
TSW Nurburgring Matte Gray 18" w/Nitto 555 & 555R, Satin Black SS Brembo Fronts, BMR Trailing Arms, Pedders Sway Bars, Whiteline Bushings
Gloss Black Valve Covers, 6k HID, V6 Handles, Interior/License Plate LEDs, Debadged, Holden Black Trim, Polk Dxi, GXP diffusor, a few bits from Crazy Paul
Originally Posted by TonyKarter
Anyone who has ever worked on a car has been in your position, and sitting cross-legged on a concrete floor with a dim shop light is its own kind of hell... Chalk it up as one of the rites of passage.
RIP Charlie - GRRRR8
RIP Chris Wells - Panzer Leader
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Vendors
So far so good on my .629 lift cam for 2 years seeing 7k. Soak them in oil and roll the tips to work the oil into the bearings. Do not pump them up as you may get an inaccurate preload reading. Proper pushrod length is key.
Phillip M.
09.5 SBM GT Sports/Premium/Roof
Engine: Stock Bottom End
Heads: Stock, LS3 Intake, LY6 Exhaust, Milled
Cam: BTR IV PD
Intake: Stock Intake, Stock TB, LS7 MAF, Volant CAI
Exhaust: 1-7/8 Kooks LT's, Off-Road Pipes, Corsa cat-back
Fuel: Fore Twin Ti 450's, Vaporworx, E85, Bosch Injectors
Drivetrain: 6L80, Sonnax
Suspension: BMR 15" Strange Coilovers
Wheels/Tires: 15x10 RT-S on 275/60R15 Pro's, 17x5 Weld on M/T 28"
Ported LSA Blower, 9.55/2.55, 102 TB, Chiller
High Compression/Boost/E85
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I'd be willing to bet those people had any from below list (or any combination of)
1) Aggressive cam profiles
2) Crappy springs
3) 5/8 thin wall pushrods
4) Heavy valves
Losing control of the valve train is the biggest reason for lifter failure. I've never had a problem with them.
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No issues so far, on my second set. Refreshed them when I did the bottom end.
Rotohack 102 intake - 102 MAF - TPIS 102 TB - TVS1900 ported & plated w 8 rib 2.5" front + OD rear
PnP Interchiller - RCR ported heads - RCR Lunati 219/231 113+1 - Forged Bottom End
ARH 2" LT headers - Solo 3" CB - MT DRs + M&H FRs on Weld RT-S
CTS-V fuel w Vaporworx - FAST 85s - Alkycontrol meth M15 + M10 - RCR tune
9.75@139.2 ? rwhp ? rwtq
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I have three years and 20,000 miles with lots of runs to 6,400 rpms with no problems.
2008 Liquid Red G8 GT, VMS 1.5 DoD Delete and Tunes, Vararam CAI, Kooks Mid-length Headers, AEM Wide Band O2, high-flow cats, Corsa Catback exhaust, M6 conversion, MGW Shifter, GXP Diff 3.70
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Beyond Help
what STL_G8GT said, and also proper valvetrain geometry in general is key...
Comp LSL and LXL lobes are your friend (or similar from Lunati, which also work great)... swap the intake valves to hollow stem, install the Comp trunion retrofit kit for the rockers, go with LS7 lifters w/ proper preload and make sure your pushrods are spec... if you want a recipe here's mine, I've put 50k miles on this DOD delete package and the only thing I've had to change is the oil:
Custom Grind Cam from Comp Cams: 218/230 0.606/0.605 115+3 (LSL lobe intake, LXL lobe exhaust)
PRC 0.650 Dual Valve Springs (in retrospect this was too much spring, beehives would have been fine but they've worked for me so...)
7.400 Pushrods
LS7 lifters throughout
LS3 hollow stem intake valves
Comp Cams Rocker Trunion Upgrade
... and of course the LS2 valley pieces etc.
My overall combo is good for 430/420 to the wheels running through a stock stall with a 650 rpm idle... your mileage may vary but I like it...
edit: while you have it all torn apart you may consider going to an LS6 oil pump... with the DOD pieces out the high volume pump is overkill... I use the LS6 pump and it works great...
Last edited by johnbell2; 12-19-2015 at 07:30 AM.
2009.5 MSM/Onyx G8 GT premium/sport/sunroof
Wrenched and tuned by Reckart Performance Tuning in Cedar Park, TX USA
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