Replaced passenger intake cam@ 95k, now at 105 no compression on 6

[AZ_Adventure_Clicks]

Long story short -
A few months ago I posted on the tick of death I dealt with and it seemed to be running fine until the other day. I was accelerating hard when it threw misfire codes P0300, 0305 & 0306...
Cleared codes and did some testing in alfaobd (clean phasers, cam relearn etc) and ended up with just 0300+0306.
Tore into it to get to the plugs (SUCH A PITA!!) which had been replaced a few months ago and were fine.
#6 was fouled bad.
No compression on 6. Tested again without the exhaust rockers and no change. Had to order a leak down test to try that tomorrow. After that I'll get a camera into the bore to inspect, but I'm really thinking it may be time for a new motor. What do you guys think?
@JeepCares would be nice to know there's some support past warranty on these but I'm not holding my breath.

Sponsored

 

[AZ_Adventure_Clicks]

Images

 

[AZ_Adventure_Clicks]

Won't load pics of the timing marks or plug... But timing checks out.

 

[ScottBeach]

Without a scope not sure what to suspect. But none of my thoughts would be cheap easy to fix. I hope you find it to be something simple like a bent valve

 

[AZ_Adventure_Clicks]

Busted valve.

 

[IanNubbit]

Busted valve.

How so? Normally here I would suspect a rocker seated sideways. You said you took the exhaust off, what about the intake?

 

[AZ_Adventure_Clicks]

We put a scope in it and could see a chunk missing from one of the exhaust valves. Also, I had been hearing what sounded like an amp/subwoofer thump when I started it recently...I guess it wasn't the sub. I have a kicker sub box in it too.
I can't load pics so here's a link
https://1drv.ms/i/s!Ak2qR2Dmsivbh6xpoIwVbOCZYnviiA

 

[AZ_Adventure_Clicks]

I did take rockers off both intake and exhaust. They look fine.

 

[ScottBeach]

Busted valve.

Sorry man. That is a bummer

 

[AZ_Adventure_Clicks]

What's the group consensus on who to buy a remanufactured motor from?

 

[ScottBeach]

Well. Wrangler forum has a few good examples of 3.6 reman. This one shows happy and clean 30 k miles after. https://www.wranglerforum.com/threads/any-experience-with-remanufactured-engine.2367733/

 

[AZ_Adventure_Clicks]

Well. Wrangler forum has a few good examples of 3.6 reman. This one shows happy and clean 30 k miles after. https://www.wranglerforum.com/threads/any-experience-with-remanufactured-engine.2367733/

Thanks man.

 

[Rusty PW]

Check with America's Most Wanted. They have engines from new Jeeps that did the Hemi swap. Lot of those are low mileage.

 

[AZ_Adventure_Clicks]

Check with America's Most Wanted. They have engines from new Jeeps that did the Hemi swap. Lot of those are low mileage.

They have 2 right now. They're asking 6k. Wonder if they negotiate.

 

[JeepCares]

Long story short -
A few months ago I posted on the tick of death I dealt with and it seemed to be running fine until the other day. I was accelerating hard when it threw misfire codes P0300, 0305 & 0306...
Cleared codes and did some testing in alfaobd (clean phasers, cam relearn etc) and ended up with just 0300+0306.
Tore into it to get to the plugs (SUCH A PITA!!) which had been replaced a few months ago and were fine.
#6 was fouled bad.
No compression on 6. Tested again without the exhaust rockers and no change. Had to order a leak down test to try that tomorrow. After that I'll get a camera into the bore to inspect, but I'm really thinking it may be time for a new motor. What do you guys think?
@JeepCares would be nice to know there's some support past warranty on these but I'm not holding my breath.

Hi @AZ_Adventure_Clicks,

Thank you for bringing this to our attention. We regret to learn about your concerns. If you have an appointment scheduled with an authorized dealership, we would be happy to connect you with a case manager for extra support. Please send us a private message.

Blair
Jeep Cares

Sponsored