Local machine shop to fix heads - CorvetteForum - Chevrolet Corvette Forum Discussion

Notices
C6 Corvette ZR1 & Z06 General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track Advertisement
Sponsored by:
Sponsored by:

Local machine shop to fix heads

Old 11-08-2018, 12:41 AM
  #1  
Jay Huh
Junior Member
Thread Starter
 
Member Since: Oct 2018
Posts: 10
Thanks: 0
Thanked 3 Times in 1 Post
Default Local machine shop to fix heads

Contacted a local machine shop that says they can fix LS7 heads. The guy that actually does them wasn’t there but the guy that works with him says they’ve done several.

Doing it local is appealing to me. Alternative is going with AHP heads which I’ve been reading so much about but I don’t like the hassle of shipping and the downtime. Also I think it’s going to save me money. I own a shop and once I get mine done, I want to advertise to get this done for all z06 owners in the area and it would be more profitable to get it done local.

So question is - is there anything else I should get done to the heads while it’s at the machine shop than just valves and guides?

Thanks
Jay Huh is offline  
Old 11-08-2018, 01:14 AM
  #2  
03Zcrit
CF Senior Member
 
03Zcrit's Avatar
 
Member Since: May 2013
Location: San Jose CA
Posts: 459
Thanked 12 Times in 12 Posts
Default

AHP has core sets available so not really much down time. AHP has done hundreds of LS7 heads and does first class work that is proven on the track and on the street. I looked for the cheapest route first like you did and contacted many local machine shops. After talking to many other members on this forum and talking to Kohle @ AHP, I decided that experience and reputation give me more confidence in the work than saving a few hundred bucks. Just my 2 cents.
03Zcrit is offline  
Old 11-08-2018, 08:34 AM
  #3  
itomh
CF Senior Member
 
itomh's Avatar
 
Member Since: Dec 2016
Location: Indianapolis
Posts: 531
Thanked 75 Times in 64 Posts
Default

Although I did my own labor using AHP heads, I'm not opposed to the idea of paying another shop to do the work. However, you better believe that they would be installing AHP heads. But, in the same breath, I'm not sure if I would hand my Z06 to a shop that has just done several. But back to your question, If you plan to do cam down the road you may want to upgrade head internals, porting heads, trunnion etc...Doing these now will save you $$ from having to take them off later and doing the supporting upgrades

Last edited by itomh; 11-08-2018 at 12:08 PM.
itomh is offline  
Old 11-08-2018, 09:54 AM
  #4  
0H8Z06
CF Senior Member
 
0H8Z06's Avatar
 
Member Since: Mar 2006
Location: Dallas TEXAS
Posts: 12,548
Thanked 534 Times in 455 Posts
Default

"Opposed".... You are not Opposed. (spelling police)
0H8Z06 is offline  
Old 11-08-2018, 10:04 AM
  #5  
Jay Huh
Junior Member
Thread Starter
 
Member Since: Oct 2018
Posts: 10
Thanks: 0
Thanked 3 Times in 1 Post
Default

Originally Posted by 03Zcrit View Post
AHP has core sets available so not really much down time. AHP has done hundreds of LS7 heads and does first class work that is proven on the track and on the street. I looked for the cheapest route first like you did and contacted many local machine shops. After talking to many other members on this forum and talking to Kohle @ AHP, I decided that experience and reputation give me more confidence in the work than saving a few hundred bucks. Just my 2 cents.
AHP heads come with all those upgrades?
Jay Huh is offline  
Old 11-08-2018, 10:40 AM
  #6  
itomh
CF Senior Member
 
itomh's Avatar
 
Member Since: Dec 2016
Location: Indianapolis
Posts: 531
Thanked 75 Times in 64 Posts
Default

They come with upgrades if you pay for them. I opted not to do a cam in the future so I passed on the trunnion upgrade.

My bill on parts alone. This would be a basic head fix
Package 4 heads. $1358 + 150 shipping.
Head gasket kit plus ARP head bolt kit $429 (You can't reuse the OEM head bolts)
Oil plus coolant (Under $100)
According to Kohl at AHP a tune is not needed for basic head fix

My extras
Head porting-street $550 (Tune needed)
Head milling .020" , no charge (Tune is needed)
Shorter pushrods $120
While I had it opened, I added B&B headers $993.99 (Tune is needed)
ESC Tuning $149 (I know a Dyno tune would be better and will do one down the road $600+) but right now she is running great
itomh is offline  
The Following User Says Thank You to itomh For This Useful Post:
Ericm1949 (11-08-2018)
Old 11-08-2018, 12:17 PM
  #7  
NemeZ
CF Senior Member
 
NemeZ's Avatar
 
Member Since: Jul 2016
Location: Bay Area California
Posts: 458
Thanked 65 Times in 62 Posts
Default

You need to find out what their “fix” is. If it doesn’t involve polishing the Ti valves, guide replacement, valve job etc. I wouldn’t even bother.
NemeZ is offline  
Old 11-08-2018, 02:22 PM
  #8  
Unreal
CF Senior Member
 
Unreal's Avatar
 
Member Since: Nov 2007
Location: Gilbert AZ
Posts: 21,384
Thanked 1,273 Times in 1,095 Posts
Default

Where are you located? Plenty of shops that are good to fix this issue.
Unreal is offline  
Old 11-08-2018, 02:32 PM
  #9  
MTPZ06
CF Senior Member
Support Corvetteforum!
 
MTPZ06's Avatar
 
Member Since: Dec 2008
Location: Honolulu HI
Posts: 11,957
Thanked 1,078 Times in 958 Posts
Default

Originally Posted by NemeZ View Post
You need to find out what their “fix” is. If it doesn’t involve polishing the Ti valves, guide replacement, valve job etc. I wouldn’t even bother.
^This..."fix" means different things to different shops. What do they do for intake valves...inspect and treat, or? What guide material do they use...bronze, manganese-bronze, PM, MS90? What do they do for exhaust valves...inspect/replace OE, solid, hollow-stem? Do they measure for seat runout, and if so...what's their target spec?
MTPZ06 is offline  
Old 11-08-2018, 03:32 PM
  #10  
99Hawk262
CF Member
 
99Hawk262's Avatar
 
Member Since: Apr 2016
Location: Colorado Springs
Posts: 57
Thanks: 0
Thanked 4 Times in 4 Posts
Default

Another nod for AHP, had them on my '09 Z, and now on my '07. They have a tried and true recipe, not that others don't as well. With their cores, there's hardly any down time, and the swap is super easy if you have basic hand tools and a place to do it (you said you have a shop, so you've covered half the battle already). Have them send you cores, and you can do the swap for the other Z's in your area.

As far as upgrades, they'll do just about anything you want for an additional cost. The only upgrade I did was PSI 1511 springs.

Last edited by 99Hawk262; 11-08-2018 at 03:36 PM.
99Hawk262 is offline  
Old 11-08-2018, 10:30 PM
  #11  
Z.06
CF Senior Member
 
Member Since: Sep 2000
Location: Fulshear TX
Posts: 643
Thanked 10 Times in 8 Posts
Default

When you go with AHP for your LS7 head fix, you are buying into their experience and knowledge base that they will get the problem fixed. In addition, they are the only source I could find that has the willingness and experience to install the Moldstar90 valve guides in the heads that they repair. This is what I was looking for and found at AHP for my car. Their customer service is second to none, IMHO.
Z.06 is offline  
Old 11-08-2018, 10:38 PM
  #12  
mkitt27
CF Senior Member
 
mkitt27's Avatar
 
Member Since: Feb 2018
Location: Carver MN
Posts: 317
Thanked 32 Times in 32 Posts
Default

Another vote for AHP. They've investigated the problems and have incorporated the fixes into their product. A local machine shop can do what tasks you ask, but they may not know what it takes to resolve the LS7 ills. The local shop may know how to clean up or refresh standard heads, but ours has specific defects.
I went with AHP. Little waiting with the core program, but the shipping is 150. each way, got surprised by that.
mkitt27 is offline  
Old 11-08-2018, 11:43 PM
  #13  
American Heritage
Supporting Vendor
 
Member Since: Sep 2013
Location: Harbor City California
Posts: 1,824
Thanked 311 Times in 195 Posts
Default

Thanks for the recommendations Gentlemen!

OP: We are one of the Top (if not the Top) LS7 head reworking shops in the country/world.
We do 300+ sets of LS7 heads per year and have been doing so for 5+ years now!
We have customer that send in their LS7 heads from not just all over the United States but from all over the world (Germany, Spain, Holland, Iran, Australia, etc...)

OP if you have any questions at all feel free to give us a call we are always more than happy to answer questions:
310-326-2399
or shoot us an email:
[email protected]

We can either rework your existing heads or you can go with one of our core sets of heads so you don't have any down time when you do the swap (simply send you old heads back after the swap for your core deposit back).
We charge $150 to ship our heads to the lower 48 states (less for California) with full insurances Via FedEx. Customer is responsible for the return shipping but our packing that you will receive your new core heads in is fully reusable so it makes returning them simple.
Shipping to us can be found for as low as $65... The $150 we charge for shipping covers the time and materials to safely pack your new LS7 heads as well as the actual shipping cost plus $3k (or more) worth of insurance on the package.

Here is a video one of our customers made of him unpacking his new AHP LS7 heads just to give you an idea of how much pride we take in our products and our safe shipping of your parts:
Thanks again For the Great unpacking video Jason!!!!



https://www.americanheritageperforma...cylinder-heads

Last edited by American Heritage; 11-08-2018 at 11:44 PM.
American Heritage is online now  
Old 11-08-2018, 11:45 PM
  #14  
Jay Huh
Junior Member
Thread Starter
 
Member Since: Oct 2018
Posts: 10
Thanks: 0
Thanked 3 Times in 1 Post
Default

Thanks all I really appreciate it
Jay Huh is offline  
Old 11-10-2018, 06:09 PM
  #15  
pokerpro
CF Senior Member
Support Corvetteforum!
 
pokerpro's Avatar
 
Member Since: Oct 2011
Location: Naples FL
Posts: 2,623
Thanked 144 Times in 111 Posts
2015 C6 of Year Finalist
Default

Originally Posted by 03Zcrit View Post
AHP has core sets available so not really much down time. AHP has done hundreds of LS7 heads and does first class work that is proven on the track and on the street. I looked for the cheapest route first like you did and contacted many local machine shops. After talking to many other members on this forum and talking to Kohle @ AHP, I decided that experience and reputation give me more confidence in the work than saving a few hundred bucks. Just my 2 cents.
I absolutely could not have said it better than you. AHP is a no brainer for LS7 head repair!
pokerpro is offline  
Old 11-10-2018, 08:31 PM
  #16  
JDebler
CF Senior Member
 
JDebler's Avatar
 
Member Since: Jun 2001
Location: Nashville area TN
Posts: 366
Thanked 58 Times in 40 Posts
Default

Kohle linked my video above. I watched it again for the first time since I published it and I felt a bit jealous of my former self. I was so happy to have those heads done and 100% confident that they were done right. I still am and I just want to experience the satisfaction of upgraded speed parts all over again. Kinda like when you look at your old Christmas morning videos and wish you could unwrap that video game system all over again.

Say...that reminds me...Kohle, I will be sending you my intake and throttle body to be ported as well this winter.

Anyway, my dad has always used the "local machine shop" to do his work and shops like that typically do good work. BUT....that was on a standard Chevrolet small block V8 . Not to knock the family owned speed/machine shops around the country....but what is important here is the fact that the LS7 engine is special. No, I am not saying it was touched by god and all that junk. But..it isn't a typical Chevrolet V8. Whoever you choose to work on it absolutely must know not only what they are doing, but understand the consequences of treating it as such. That kind of understanding is only gained from extensive experience and very critical procedures. If your local shop cannot explicitly cite that they have that experience and knowledge, I'd respectfully consider AHP as a first choice. Do not take any risk of having someone say "Shoot...sorry...I thought it was a regular ol' 427 engine." You just don't want to take the chance of paying a little now and a lot later.



JDebler is offline  
Old 11-10-2018, 11:12 PM
  #17  
mkitt27
CF Senior Member
 
mkitt27's Avatar
 
Member Since: Feb 2018
Location: Carver MN
Posts: 317
Thanked 32 Times in 32 Posts
Default

Exactly, well said! This isn't a 'tune up' or refurbishment that is typically done. It is a fix to a defect that does not occur by normal wear and tear but a defect in manufacturing that the local shop won't know to look for and standard refurb won't resolve.
OP be sure who you go to is knowledgeable with the specific issues on the LS7!
mkitt27 is offline  


Thread Tools
Search this Thread
Sponsored Ads
Vendor Directory

Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: