murf257

I took my Z06 to the dealer for the 'wiggle test' and it failed.

Had them remove the heads and I shipped them to AHP

Upon the return the dealer reinstalled them

I have less than 700 miles on them and yesterday dropped an exhaust valve, hit the piston and trashed the motor!!

Apparently the valve keepers came loose on multiple valves

I have a phone call into AHP but there is a different time zone so I'll wait and let the group know

pewter99

meanjoe

I bet the dealer forgot the lash caps. Try not to let them anywhere near it until you can check it.
I just noticed you said exhaust valve. No lash caps there. Are you sure it was an exhaust valve?

Unreal

If it was really an exhaust valve, they don't run lash caps.

Best of luck to the OP.

meanjoe

I was just fixing my post. You're too fast for me.

jayyyw

Interested to hear the outcome.

shane p

.gearhead.

The timing of the failure soon after install certainly raises questions about the install.

Good luck with a timely resolution.

MTPZ06

^This.

OP, were the heads AHP's standard package #4, or were there changes made such as retaining OE valves (vs F2042p), etc.?

Is the block salvageable, or do you need a whole new motor?

stock z

you are scare me i got head rework@ AHP with basic 4,and i just done install to my car,engine idle good,but i got air in brake system. can not drive no where

pokerpro

murf257

I just got off the phone with Kohle and after viewing my head pictures saw NO lash caps on the intake valve which let go!

pokerpro

I guess the bright side is the dealer is on the hook for a new LS7 for you.

sublime1996525

It's going to be a long, hard fight to get them to pay but they should.

MTPZ06

American Heritage

No worries there Corvette Bretheren. We are still building Top Tier LS7 heads (some of the best LS7 heads in the world).

The issue in this thread was an installation error.
The installing shop left of the intake valve lash caps and the rocker wore down/ate away the soft titanium valve tip till it wore past the keeper thus dropping an intake valve into the cylinder bore.

Customer Sent us some pics... Always get pics they prove who is at fault!

In this case it was the installing technician/dealer who left off the intake valve lash caps.

Pics:



Prof of no lash caps on the intake valves




Clear cut case of intake valve lash caps left off at installation.
Always make sure your intake valve lash caps are reinstalled before installing your rocker arms.

Mordeth

Ugh. Real sorry to hear this. How could they possibly forget the lash caps? If that is true, they owe you a motor. The Ti intake valve tips will not last long without lash caps. Did you hear anything abnormal prior to failure?

J.J.D.O.

Ugh, exactly why I refuse to allow anyone to do major work on my 427. Still looking for a great Indy here in Northeast FL. Sad to hear. I hope all is quickly resolved. This should not be your problem.

Must_Have_Z

As soon as you said "dealer" ... I knew how the story was going to end. Best of luck bud.

stock z

For myself i don't like bring my car to dealer. if i had some thing go wrong to my car i just GOOGLE it anything come out my brain ,i know o lot of guys here done the job better than mechanic work in dealer.