05-26-2013, 12:18 PM | #1 |
Drives: 2010 2SS RS M6 Blk Join Date: Jul 2010
Location: Md
Posts: 287
|
WTF "The Sequel": Lifters and Cam damage...again
Quick history lesson: 9 months ago I had the LG G6X3 cam installed in my 2010 SS LS3. Also had TB ported by builder. Oil pump failed on the dyno post install (I was not present). Pump was replaced w/ stock, no idea if there was any damage as builder assumed there was none (Yes, my fault for not pressing the matter). Car dynoed 470/440. Car ran fine for ~ 1 month before developing a sudden and very noticeable ticking. Towed back to shop, teardown showing half the lifters destroyed/mushroomed in addition to extensive cam scoring and damage. LG stepped up and replaced the cam ( adjusted the grind to allow for a tiny bit more PTV clearance just in case) and lifters citing potential/probable oil cause (mobile1 lack of zinc/magnesium for cammed vehicles) and builder put it back together. Lifter bores were "assumed" to be fine by builder even though the lifters had to be forcibly removed (dug out). Car dynoed 455/424, no one can explain it (no idea why and tuning is another story entirely...).
Fast forward to this past Friday: Not having any issues since 2nd install back in October, car suddenly develops a ticking pulling out of driveway. Immediately pulled it back into garage and shut her down, the tick was definitely coming from the motor. Did a full tear down to the block yesterday w/ help of buddies. First thing I noticed was that my supposedly "ported" TB was beat to absolute sh*t. The inside was scored and dug out/grooved in a total hack job. Worse, there was a quarter sized piece missing from the neck/lip!! Infuriating and clearly a massive screw up by builder who never told me and sought to cover it up. Also the drivers side head and block valley had extensive scuffing and "grinding" marks from what I can only assume was from the last "install." Again, maddening. Next, upon removing the passenger side head we found several lifters did not easily slide from the bores. 1 lifter required some assistance via pliers on the #2 cylinder to come out though we didn't see any real damage. However, a lifter from the #4 required 15 of plier work and sweat to pull from the bore and showed signs of damage (roller chewed though intact) and scuffing etc. Below are pics I took, I have others: So aside from apparently requiring repairs to the bores (is it possible?) which should have been done originally, and needing new lifters and cam...I also need a new throttle body which was trashed by the builder. I guess for now my question would be what am I looking at for repairs and other possible damage that may yet be unseen? I can take stuff apart (to help save money for teardowns) but prefer to leave the repairs and mods to pros. Any help/suggestions would be welcome.
__________________
418 LS3, custom cam, tuned vararam, ported tb, Kooks stepped LT's, Kooks Hi-Flo cats and 2.5" street sleeper cat back, 18% UDP, crap stock rear tire size 12.03 @ 117 mph.
|
05-26-2013, 12:24 PM | #2 |
Drives: 2015 Z/28 #533 Join Date: Jul 2012
Location: NY
Posts: 6,731
|
Holy shit!
Who the hell was this "builder"? |
05-26-2013, 12:37 PM | #3 |
Drives: 2010 2SS RS M6 Blk Join Date: Jul 2010
Location: Md
Posts: 287
|
For now I'm going to withhold his name and shop in the possibility that he will take the opportunity to help correct this mess. Already reached out to inform him. The throttle body is an obvious screw up as well as the head "scoring". I honestly can't lay blame regarding the cam/lifters since sh*t happens and you just can't say it was the builder...I mean it's a cam install, hard to screw up. But I'm still here scratching my head...
__________________
418 LS3, custom cam, tuned vararam, ported tb, Kooks stepped LT's, Kooks Hi-Flo cats and 2.5" street sleeper cat back, 18% UDP, crap stock rear tire size 12.03 @ 117 mph.
|
05-26-2013, 12:45 PM | #4 |
Drives: 2SS RS Join Date: Mar 2010
Location: MD
Posts: 1,272
|
Ouch.
__________________
Livernois 2C cam and tune, LS3 conversion, Roto-Fab intake, Kooks headers, DSS driveshaft and axles, BMR suspension parts, VMax ported throttle body, Whipple blower. (623hp).
|
05-26-2013, 12:47 PM | #5 |
Drives: 1996 Camaro Z28, 2012 2SS/RS Join Date: Aug 2012
Location: Texas
Posts: 279
|
How are they in business doing work like that?
__________________
2012 2SS/RS IOM, LS3, Aftermarket Hurst shifter, IOM interior, Borla "S", 1 7/8 Big Flow headers, ADM Race cold air, BMR 1" lowering springs, SLP Supercharger, Custom Comp Cam, Fore Innovations twin pumps, Flex Fuel Sensor
|
05-26-2013, 12:58 PM | #6 |
|
Wow that's scary. Hope it all work out for you.
|
05-26-2013, 01:01 PM | #7 |
Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012
Location: Vance Alabama
Posts: 8,019
|
Judging by the pix of the tb it looks like a cnc job that's been gone over again and made too thin.
__________________
Retired wanna be cylinder head porter
2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X |
05-26-2013, 01:08 PM | #8 |
Drives: 2010 2SS RS M6 Blk Join Date: Jul 2010
Location: Md
Posts: 287
|
The first thing I thought when I saw the missing metal was...wtf is that piece??? I can't imagine anyone installing that on a car...so if I assume it was too thin and broke off after install...that piece was/is in my motor. What kind of damage could that have caused...
__________________
418 LS3, custom cam, tuned vararam, ported tb, Kooks stepped LT's, Kooks Hi-Flo cats and 2.5" street sleeper cat back, 18% UDP, crap stock rear tire size 12.03 @ 117 mph.
|
05-26-2013, 01:32 PM | #9 | |
Quit being a pu$$y
|
Quote:
__________________
|
|
05-26-2013, 02:00 PM | #10 |
Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012
Location: Vance Alabama
Posts: 8,019
|
One thing that back yard mechanics dont realize is the ls engine is not as forgiving as the SBC. Not saying that the op took his car to such a person.
__________________
Retired wanna be cylinder head porter
2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X |
05-26-2013, 02:01 PM | #11 |
Drives: 2011 IOM 2SS/RS Join Date: Dec 2010
Location: Chatham, Illinois
Posts: 756
|
Your builder sucks. No doubt about it.
Sent from my HTC One X using Tapatalk 2
__________________
American Racing 1 7/8" Headers and Hi-Flow Cats, CAI cold air intake, Flowmaster AT exhaust, Vengeance Racing Stage 2 cam, VMax ported throttle body, TEA valve springs and titanium retainers, Trick Flow hardened pushrods, 180* T-stat, Comp Trunion kit, ZL1 Fuel Pump, ADM Fuel Pump Control Module, 20% window tint, Whipple Supercharger. Tuned by Mike Norris Motorsports. 656rwhp/584rwtq @10 PSI.
|
05-26-2013, 04:58 PM | #12 |
|
Op, how many miles since this cam and lifter repair was done?
|
05-26-2013, 07:33 PM | #13 | |
Account Suspended
Drives: 2017 Camaro ZL1 A10 Join Date: May 2012
Location: NJ
Posts: 7,692
|
Quote:
But concerning your story, I personally don't like that your builder "assumed" there was no engine damage when the oil pump failed. If anything, he should have assumed that there WAS engine damage. Or at least explained to you that it's a huge possibility. He should have given you the choice of either breaking the engine back down or just leaving it alone and hoping for the best. And then to "assume" that the lifter bores were fine after having to forcibly remove the lifters is just idiotic. Especially since the engine was already out and torn down. That makes no sense and he should have known better. Your best bet is to take the block and the heads to a machine shop and ask their opinion. |
|
05-26-2013, 07:51 PM | #14 |
Drives: Mini Van Join Date: May 2013
Location: PA
Posts: 6
|
Sounds like its time to find a new mechanic. I also wouldn't recommend using the G6X3 cam in unless it just a track car. It has very aggressive intake lobes that are hard to control.
|
|
|
|
|