- What does a dead hole mean?
- What leads you to believe the engine is blown?
- Did it over heat or have any indication there was a problem before you went to the dealer.. If your head gasket is blown you would have signs, either smoke from the tail pipe or over-heating...
- We know some 08's had head gasket issues of their own - there were a few threads started by people with stock JK's and head gasket issues - the dealer didn't do anything for them either.
- We have some of our dealers who have pointed out this issue NA as well
Compression test should take about 45min with removal of the supercharger - the task is to get to the spark plugs, screw in a gauge and have someone crank it and write down the pressures. We haven't seen any blown pistons...
Leak down time is about the same
If you have a GEN1 kit, at idle and with the belt off the JK is stock there are no corrections being made... essentially removing the belt and the blower from the cradle returns it to stock with the exception of the battery placement.
Yes, I have the GEN1 kit and the original air intake, but it is 500 miles away in San Jose as is all the other stock parts. They (the dealership) even made noise about the non-stock spark-plug wires.
I think in the techs vernacular, a "dead hole" is a non-firing cyclinder, so, for example, if an exhaust value spring is broken, all the fuel/air exits before it can be fired. He said it "sounded like a dead hole" meaning he thought it should have a compression leak down test -- but the manager of the service department wouldn't let my jeep in his shop.
So, here is the story in a nutshell. I had an incident while cargoing the jeep from San Jose to San Diego in which the windshield was smashed and the hood damaged. I have insurance and got a repair claim. I took it to Paradise Chevrolet in Temecula which was a "preferred" body shop by the insurance company. The jeep was running fine when I took it in, when I picked it up three weeks later, it woudln't run. The body shop makes no claim of liability and says they can prove with survelance video that the jeep never left their lot.
So, I have no engine codes, no service engine light, and no power. If I try part throttle it makes a clanking sound.
Today the body shop called me and said they had there service center put it on a lift and used a stethescope to find that there is chatter coming from the catalytic converters and that they saying it is bad/plugged up cats from too much fuel being dumped by the supercharger.
I am skeptical of this since I have an AEM air/fuel ratio guage installed and it usally runs in the 14 to 15 range and only rarely will go below 12 if I really, really push it on the freeway. I can't see that plugged cats are the primary problem, it may be secondary to having unburned fuel being dumped by a "dead hole"