Engine Problem - I Fear the Worse - YOUR THOUGHTS?
06-15-2018, 06:32 AM
#42
Le Mans Master
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06-15-2018, 10:40 AM
#43
Safety Car
Thread Starter
UPDATE: Car not fixed yet. It's been down over 3 weeks and I was just informed by my dealer 2 days ago they've been waiting on needed parts that are unavailable/back ordered. I made some calls and pulled some strings like last June when I couldn't get a water pump for my car for over 2 months. The folks with the GM Performance group in Detroit came through again and got me what I needed FedEx'd to my dealer in two days (i.e., final part(s) being delivered today). If my dealer had told me parts were not available I could have sourced them with my contacts in MI much earlier.
In addition to the cylinder head my service adviser emailed me they also need to replace a "wiring harness". Adviser also stated the entire engine came close to "blowing" up. The tech working on the car is very competent but has been away at GM training this week so I haven't been able to discuss what all they found. He returns Monday.
I do know I'll be missing a long scheduled track day this coming Tuesday. Even with the needed parts in hand the dealer won't be able to have it ready for my event.
The service manager says it's a 15 hour job to put it back together. That's a lot of hours. I don't believe the book would call for anywhere near that many hours for a cylinder head so I'm assuming the "wiring" harness work must be significant. Just wish I knew what harness and why it needs to be replaced. I'm struggling to make a connection between a failed cylinder head and a wiring harness.
Sort of sucks but does no good to sweat the little things in life. I'll update when I know more.
Rick
In addition to the cylinder head my service adviser emailed me they also need to replace a "wiring harness". Adviser also stated the entire engine came close to "blowing" up. The tech working on the car is very competent but has been away at GM training this week so I haven't been able to discuss what all they found. He returns Monday.
I do know I'll be missing a long scheduled track day this coming Tuesday. Even with the needed parts in hand the dealer won't be able to have it ready for my event.
The service manager says it's a 15 hour job to put it back together. That's a lot of hours. I don't believe the book would call for anywhere near that many hours for a cylinder head so I'm assuming the "wiring" harness work must be significant. Just wish I knew what harness and why it needs to be replaced. I'm struggling to make a connection between a failed cylinder head and a wiring harness.
Sort of sucks but does no good to sweat the little things in life. I'll update when I know more.
Rick
Last edited by rikhek; 06-15-2018 at 10:51 AM.
06-15-2018, 10:47 AM
#45
Safety Car
Thread Starter
Hey Rick - was talking with Tony Avedisian of Tony's Corvette Shop in Gaithersburg, MD on Saturday and he indicated he has had to replace heads on several Z06's because the valve guides were elongated!!! He showed me one of the heads and there was so much play between the valve shaft and the guide it was unbelievable! He indicated there have been around THIRTY engine failures plus other problems like you indicate and GM is aware...........
Leave it to me to be the first....
However, I'm quite certain my current LT4 head issue is not related to valves. Steam coming out the engine compartment AND exhaust sounds like a cracked or warped head to me. FWIW, the car never got "hot".
Rick
Last edited by rikhek; 06-15-2018 at 10:50 AM.
06-15-2018, 11:24 AM
#46
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I'm pretty sure what Tony has to say has absolutely nothing at all to do with the issues you're experiencing, Rick. Keep working through your dealer, you'll get this beaten.
06-15-2018, 01:11 PM
#47
Melting Slicks
If your cracked head spewed coolant, fuel and/or exhaust unto the harness or their connectors they may need to be replaced. It just takes one line that is partially screwed up and intermittent to have you chasing your tail.
06-15-2018, 01:16 PM
#48
Drifting
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Hey Rick - was talking with Tony Avedisian of Tony's Corvette Shop in Gaithersburg, MD on Saturday and he indicated he has had to replace heads on several Z06's because the valve guides were elongated!!! He showed me one of the heads and there was so much play between the valve shaft and the guide it was unbelievable! He indicated there have been around THIRTY engine failures plus other problems like you indicate and GM is aware...........
Anyone else notice this?
08-27-2021, 02:04 AM
#49
2nd Gear
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Hi. Anyone who owns a car has had to fix it, and sometimes we don't even know what's broken. For example code P0603 on a 7.3L engine, a code that indicates something is wrong. What Is P0603 Code On 7.3 Powerstroke: How To Fix? These are the questions I had. I will be able to find the answers. And I will be able to solve this problem.
Last edited by Joedan; 08-27-2021 at 02:04 AM.
08-27-2021, 02:43 AM
#50
Racer
/clap
08-29-2021, 03:12 AM
#52
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Hi. Anyone who owns a car has had to fix it, and sometimes we don't even know what's broken. For example code P0603 on a 7.3L engine, a code that indicates something is wrong. What Is P0603 Code On 7.3 Powerstroke: How To Fix? These are the questions I had. I will be able to find the answers. And I will be able to solve this problem.
Bill