New LS7 - Corvette Forum : DigitalCorvettes.com Corvette Forums
 
 
Go Back   Corvette Forum : DigitalCorvettes.com Corvette Forums > C6 Corvette Forums > C6 Corvette
Register Forums Garage Garage Mark Forums Read Auto EscrowInsurance Advertise

Notices

C6 Corvette General | Technical | Performance | Aftermarket | Discussions

Other sections:
Corvettes Classifieds
Corvette Detailing & Car Care
Corvette Audio/Video/Radar
General Automotive/Shop/Tools
Corvette Performance Driving/Racing

Shops/Tuners
Custom Image Corvettes
A&A Corvette
Corvette tuner

Interior
Corvette aftermarket products

Insurance



Parts & Products
Race Ramps
Edelbrock
ATI/Procharger
Corvetteguys.com
Melrose Motorsports
Parts Taxi
Airaid
Pfadt Racing
Madvette Motorsports
Hi-tech Custom Concepts
Corvette Garage
Corvette Parts and Accessories
Corvette Car Care Products
Corvette HID

Tracks/Schools
Bob Bondurant School of High Performance Driving
Corvette driving school

Wheels/Tires
Cray Wheels

Services
BADWERKS.com
Reply
 
Thread Tools
Old 05-02-2019, 01:41 PM   #1
WKND427
DC Crew
 
Posts: 4
Member #168977
Member since: Oct 2016
Location: Discovery Bay/CA/USA

My Corvette(s)
2013 60th anniversary 427

Thanks: 0
Thanked 0 Times in 0 Posts
New LS7

Well, after 14100 miles my 2013 427 Corvette, it is now getting a new LS7 crate motor direct from Chevrolet. The diagnosis is same as my buddy's 2013 with 9000 miles. It appears there is a coating on the rods that can slough off and contaminate the complete oil system, thus wearing all components. The symptoms are hard starting on a hot motor and low oil pressure at idle <20psi.

Glad I purchased the aftermarket warranty from GMC, all covered

Thanks to Able Chevrolet in Rio Vista, CA for all of their expertise and assistance in taking care of this problem.
WKND427 is offline   Reply w/quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 05-02-2019, 06:24 PM   #2
Maniacmechanic1
DC Crew
 
Maniacmechanic1's Avatar
 
Posts: 4,954
Member #176497
Member since: Dec 2017

Thanks: 196
Thanked 213 Times in 193 Posts
2011 was the last year for Tri metal lead based Main & connecting rod bearings used by GM.


Come 2012 to present they are Aluminum Main, Connecting Rod & Cam bearings.


So your old 2013 & GM replacement LS7 has the same aluminum engine bearings.


The Ti rods chromium nitrate coating wears gradual.
Its the coating GM used there are others out there.
Ti wear dust gets embedded in Lead Based engine bearings so no harm done.


Aluminum bearings do not trap or embed any foreign debris period.
So the engine wears out fast and just self destructs.


Sole reason why earlier Ti rod engines lasted over 100,000 miles ran hard they had Lead based Tri metal bearings.


GM Took the Lead out so Kaboom it blows up.


All You can do is use a Premium True racing oil & I would use a thicker spec.


Do Your homework.
Maniacmechanic1 is online now   Reply w/quote Quick reply to this message
Old 05-02-2019, 06:30 PM   #3
Maniacmechanic1
DC Crew
 
Maniacmechanic1's Avatar
 
Posts: 4,954
Member #176497
Member since: Dec 2017

Thanks: 196
Thanked 213 Times in 193 Posts
I have a 2009 C6 Z06 Ti Rod & piston.
Customer gave it to me after a Factory Mahle piston failed.


Rod looks like new has zero side check big end wear & it has a Lead tri metal rod bearing in it yet.


When the Mahle piston failed it took out the aluminum block.


Let go at 150,000 miles and he had over 900 HP at rear wheels supercharged.
He was street racing at 170 mph when it let go.
Maniacmechanic1 is online now   Reply w/quote Quick reply to this message
 
Old 05-02-2019, 06:40 PM   #4
Maniacmechanic1
DC Crew
 
Maniacmechanic1's Avatar
 
Posts: 4,954
Member #176497
Member since: Dec 2017

Thanks: 196
Thanked 213 Times in 193 Posts
The Real solution is to install Cleavite Tri metal bearings.
Lead based bearings.


Never going to do it with a GM Dealership & Under warranty.


Cluster fick....It will blow up again with aluminum engine bearings & the LS7 Ti Rods.
Maniacmechanic1 is online now   Reply w/quote Quick reply to this message
Old 05-03-2019, 01:39 PM   #5
WKND427
DC Crew
 
Posts: 4
Member #168977
Member since: Oct 2016
Location: Discovery Bay/CA/USA

My Corvette(s)
2013 60th anniversary 427

Thanks: 0
Thanked 0 Times in 0 Posts
Some good information and not so good news about my new motor. I really do not need to keep swapping motors every 15 thousand miles, even if they are free. I am going to take a look at all my options here.

Thanks Guys
WKND427 is offline   Reply w/quote Quick reply to this message
Old 05-03-2019, 07:42 PM   #6
Maniacmechanic1
DC Crew
 
Maniacmechanic1's Avatar
 
Posts: 4,954
Member #176497
Member since: Dec 2017

Thanks: 196
Thanked 213 Times in 193 Posts
Quote:
Originally Posted by WKND427 View Post
Some good information and not so good news about my new motor. I really do not need to keep swapping motors every 15 thousand miles, even if they are free. I am going to take a look at all my options here.

Thanks Guys
You could get the Warrenty LS7.
Take it home and go through it and install your engine bearings from Cleavite.
Tri Metal Lead or otherwise known as Babbit overlay bearings.
Do it yourself. Or get help from a good mechanic like me.
2 k to do all fair for a real mechanic working on the side.
Maniacmechanic1 is online now   Reply w/quote Quick reply to this message
Old 05-06-2019, 02:45 PM   #7
WKND427
DC Crew
 
Posts: 4
Member #168977
Member since: Oct 2016
Location: Discovery Bay/CA/USA

My Corvette(s)
2013 60th anniversary 427

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Maniacmechanic1 View Post
You could get the Warrenty LS7.
Take it home and go through it and install your engine bearings from Cleavite.
Tri Metal Lead or otherwise known as Babbit overlay bearings.
Do it yourself. Or get help from a good mechanic like me.
2 k to do all fair for a real mechanic working on the side.
I have an extended warranty until middle of next year. New Engine warrant is 3yr 100k. if i change internal components wont it void my existing warranty?
WKND427 is offline   Reply w/quote Quick reply to this message
Old 05-06-2019, 03:32 PM   #8
Maniacmechanic1
DC Crew
 
Maniacmechanic1's Avatar
 
Posts: 4,954
Member #176497
Member since: Dec 2017

Thanks: 196
Thanked 213 Times in 193 Posts
Quote:
Originally Posted by WKND427 View Post
I have an extended warranty until middle of next year. New Engine warrant is 3yr 100k. if i change internal components wont it void my existing warranty?
Yes if they find out.
Maniacmechanic1 is online now   Reply w/quote Quick reply to this message
Old 05-06-2019, 03:35 PM   #9
Maniacmechanic1
DC Crew
 
Maniacmechanic1's Avatar
 
Posts: 4,954
Member #176497
Member since: Dec 2017

Thanks: 196
Thanked 213 Times in 193 Posts
Quote:
Originally Posted by WKND427 View Post
I have an extended warranty until middle of next year. New Engine warrant is 3yr 100k. if i change internal components wont it void my existing warranty?
Most gave up on LS7 I read.
Sold them off.
Or bought Callies Rotating assemblies and used an iron truck block with LS3 Heads.
Steel rods used instead of Ti.
Maniacmechanic1 is online now   Reply w/quote Quick reply to this message
Old 05-06-2019, 03:44 PM   #10
Maniacmechanic1
DC Crew
 
Maniacmechanic1's Avatar
 
Posts: 4,954
Member #176497
Member since: Dec 2017

Thanks: 196
Thanked 213 Times in 193 Posts
The Entire ideal behind Titanium rods in the LS7 was to use Mobil 1 oil 5w30 with a 7000 Rpm redline.
They Tried with Forged Steel rods to begin with and had engine failures because of too high of reciprocating mass claimed.
The real issue was 5w30 oil.....too thin when hot its like water with little film strength.
That was then.
Racing oils are better today.
Royal Purple XPR is best you can buy and it's not cheep at $20 per quart.

10w30 would have been a better choice.
Drag Racers used 20w50 for a reason and still do today.

5w30 gives max fuel economy.
Maniacmechanic1 is online now   Reply w/quote Quick reply to this message
Old 05-09-2019, 09:51 PM   #11
Maniacmechanic1
DC Crew
 
Maniacmechanic1's Avatar
 
Posts: 4,954
Member #176497
Member since: Dec 2017

Thanks: 196
Thanked 213 Times in 193 Posts



Couple of photos I also posted on Grump's site tonight also.


The C6 ZO6 piston & rod the customer gave me.
He had 1000 RWHP and It let go with a Big Bang.
Rods all survived.
Factory Cast Hyperuentic pistons failed.
Amazing strong rods Titanium.
The Larger Rod is my TA Pontiac Crower Titanium rods I am using my engine build 2019.


The bearing is Lead Babbit. Scratched easy with my thumb nail.
On backside of the rod bearing its stamped 07/07 for July 2007 made.
No Titanium dusting issue like later aluminum bearing LS Engines all. They even used aluminum bearings in Crate Big Block Chevies all. Grumpy showed us recent.
Terrible for High HP & Racing...they Suck....going to go Kaboom with HP !
Maniacmechanic1 is online now   Reply w/quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Corvette Forum : DigitalCorvettes.com Corvette Forums forums, you must first register.
Please enter your desired user name (12 CHARACTERS MAXIMUM), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
City / State / Country?
Where you live
What kind of Corvette(s) do you own?
This field is not required.
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
LS7 / LS9 FANS - New website! CorvetteConti C6 Corvette Z06 14 03-04-2007 01:16 PM
New AMG V-8 outdoes Z06's LS7 GrantG C6 Corvette Z06 43 07-12-2005 08:18 PM
New LS7 Internal's Pics ankurpatel C6 Corvette Z06 5 02-01-2005 05:14 PM
What Price For The New Z06 LS7? DavidNJ C6 Corvette Z06 20 12-22-2004 12:44 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -6. The time now is 06:34 AM.




Powered by vBulletin® Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
2003-2011, DigitalCorvettes.com - All Rights Reserved