[Jordan707]

What should I do I’ve got the code P300 on my 2015 Dodge Charger hellcat and I’ve bought new spark plugs and move the coil packs around… then i got the P307 code, I switched the injector from cylinder #7 to another cylinder same problem… cars sounds ruff while idling n so forth. I’ve got the compression test done and found zero compression on cylinder #7 said the piston has failed… what should I do???? Help me save money

 

[Rockster]

Piston failed? Or a lifter/cam lobe has failed? Guess at this point doesn't matter. The engine will probably need to come out and be torn down to determine what is wrong and if the engine can be salvaged with a repair or if it (the short block) has to be replaced.

No Hellcat experience in this regard but to save money on engine work, engine rebuilds, I did what labor I could at home.

 

[baabootoo]

Answer: Is there a back story? Racing, nitrous, accident?

 

[Greengohellcat]

Same cylinder has the issue after switching the coil/plugs?
Chech the rocker arms. Take valve cover off to investigate.

 

[Xylander]

Help me save money

Sadly, I don't think that's possible.

 

[SRK]

You need to perform a leak-down test on number 7. That will tell you if the compression loss is a valve or the piston. You seem to think it is a piston - how did you determine that? And I'll second the opinion that saving money is not an option. You're in for a major repair or rebuild, or a used engine.

 

[Long Island SRT]

Maybe you can get your hands on a borescope and do a visual check on the piston(s).

 

[dragrcr]

Amazon.com: USB Snake Inspection Camera, 2.0 MP IP67 Waterproof USB C Borescope, Type-C Scope Camera with 8 Adjustable LED Lights for Android, PC : Industrial & Scientific

Amazon.com: USB Snake Inspection Camera, 2.0 MP IP67 Waterproof USB C Borescope, Type-C Scope Camera with 8 Adjustable LED Lights for Android, PC : Industrial & Scientific

www.amazon.com

 

[Jordan707]

Answer: Is there a back story? Racing, nitrous, accident?

No racing nor nitrous bro just accident I’m guessing

 

[Jordan707]

Sadly, I don't think that's possible.

True but I don’t want to spend as much why I said help me save money

 

[Xylander]

Well, the reality is that your problem likely requires, at a minimum, the head being removed, the oil pan, and removal of the piston and rod. Even before you factor in the replacement parts, you're talking a couple thousand dollars, minimum. The actual cost of this repair may very well be over $5,000.

 

[areuriding]

Yeah, no saving money even if you do all the work yourself..... Sorry for the bad luck