I have been running my stock rockers in my 01 Z with a 383 since 2007. Car makes over 500 rwhp NA and just under 700 on nitrous. I have done nothing to the stock rockers. They have been going fine.
The list Quote James E...... - 2007 Z06 - built JAN 07 - ______ 3450 (one rocker starting to fail engine built 1707) KGjevre...... - 2007 Z06 - built JAN 07 - intake 3797 (cyl 7 & 8 stock 1st oil change engine built 12207) jan eric..... - 2007 Z06 - built JAN 07 - ______ ____ tigerwho..... - 2007 Z06 - built JAN 07 - ______ 4800 (all rockers with excessive play) Pistol Champ. - 2007 Z06 - built
The beginning (from 61307) httpforums.corvetteforum.comshow...28&postcount1 Quote Originally Posted by Ken Fichtner SERVICE - CHEVROLET DEALERS Subject rocker Arm Concern Diagnosis on 2007 Z06 corvette Models 2007 corvette Z06 This message applies to 2007 Z06 models only -- equipped with the LS7 engine. If your dealership encounters a 2007 model Z06 corvette with a rocker arm concern such as needle
My info 1. car build month January 2007 2. how many and intake or exhaust rocker arm failure 2 both were the (offset) intake rocker arms 3. stock or modded enginesoftware stock 4. mileage when it was discovered 3797 5. current milage (and no further problem) car still at dealer wating for a part - will be 3 weeks total on Friday... 6. cylinder (leftdrivers side front to back 1-3-5-7 right side
hasten the failure of the weak link. Maybe thankful that its just a rocker arm assembly and not something major. Look at all the LS1 LS2 LS3 LS6 and LS7s out there in corvettes and buggys and what ever else have these motors they all have the same thin retainer washer in all of them. Doubt its a bad batch of rockers. But if you insist that it is Ill keep you posted if mine spit needles. C6 Z06 2007
was made then look for another condition. Remove the oil pan and clean out any additional bearings found within the oil pan. Refer to the Engine Mechanical sub-section in the appropriate Service Manual. Install the oil pan. Refer to the Engine Mechanical sub-section in the appropriate Service Manual. --------------------------------- However it looks like we have a much higher failure rate in 2007
Quote Originally Posted by Tarheels1 I just had a new blower cam with specs 227 INT 289 EXH DUR.050 lift .618 INT .623 EXH & lobe separation of 115. I just added 1 78 with 3 with Hi-Flo Cats from Kooks Headers and ZR1 Bi-Mode mufflers. I was told that this cam is easy on the valve springs. I also had roller bearing trunnions for the stock rocker arms and heavy-duty push rods added. My next plan is
Quote Originally Posted by Tarheels1 I was told that this cam is easy on the valve springs. I also had roller bearing trunnions for the stock rocker arms and heavy-duty push rods added. So you didnt upgrade springs on the cam swap
supply chain-say the quality control of a source of materials (such as a bearing maker) to a manufacturer which supplies parts (such as rocker arms) to a final assembly facility (such as GMs Performance Build Center)-the result can be quite unfortunate. Sadly this happened twice in the LS7s life. The first problem developed in a relatively small number of LS7s assembled during the first half of 2007.
Quote Originally Posted by RFE-57 Hi ST Appreciate the post but I must be missing something I dont quite understand the point of your post..... So I have a question and maybe you can point me in the right direction........... So for a person that has a totally stock Z06 (2007) like myself and uses it for general street driving what can we do to mitigate the stock rocker arm risk I think you are still
has actually used them. I like the fact that they start with GM castings. This is great information. This is my first major engine mod so Im just trying to get all of my ducks in a row. Thanks for the info. My next step is to pick some rockers to go along with this cam. Are you looking for 650 hp at the crank or RWHP I had good results with mine at the time. I built that engine in the 67 back in 2007.
springs with the LS9 springs which wouldnt be a big deal. I havent bought the E-Force kit yet so this is still an option. This thread had me thinking that it would not be an easy swap httpforums.corvetteforum.comc6-t...s2-to-ls3.html Quote Originally Posted by Streetk14 Are you looking for 650 hp at the crank or RWHP I had good results with mine at the time. I built that engine in the 67 back in 2007.
Quote Originally Posted by JMNZO6 Been considering cam swap to a Comp cams 227-239 for the 2007 Z. Would be doing the springs retainers exhaust valves rocker arms and combustion chambers clean up along with some intake to port matching. My question is directed to my fellow Z owners that have installed this cam in the Peoples Republic of California that have had to smog their Z cars with this cam. Any
2006 - 2007 rocker arms fail. Newer years ok per service manager. One of my lifters just failed nuking the cam.
oil to leak out and ignite Dont we have the same problem OP and another Z06 recently caught on fire while I was on track with them And I would bet that GM has already replaced more than the 700 that Porche is about to not to mention how many sets of heads they are now replacing DH The LS7 had oil starvation problems initially (what got my 06 engine) fixed with 2009 oil tank then rocker arms in 2007
Quote Originally Posted by Minkster The LS7 had oil starvation problems initially (what got my 06 engine) fixed with 2009 oil tank then rocker arms in 2007 and now head milling issues causing excessive valve guide wear. So somewhat related in that it is an internal engine QC issue vice a design issue IMO. Not sure how many LS7s have been replaced under warranty as GM is the only entity that has that