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Discussion Starter #1
Hey guys,

I've read these types of posts before, and hoped I'd never be the guy on this end of it.

My 2006 XK Hemi 4x4 has 116k miles. I religiously change the oil, and changed the plugs July last year.

I got in my Jeep on Thursday, and drove 10 mins up the road to pick up my son from school. No issues. I parked, went inside, and came out 5 mins later, and the Jeep wouldn't start. Turns over fine, tach shows rpms while cranking, but no idle. If I pumped the throttle, I got maybe 2-3k rpms before it died again. I checked every fuse, then called a tow.

Yesterday, the shop (independent) called and said they think "there's something loose inside the engine", and they I'll have to replace it. Quoted me $3700 for the engine, $2000 labor, $500 misc parts, and $590 tax for a grand total of $6890. OUCH!

The mechanic said he DID NOT pull the heads and scope the cylinders. He said it would just be a waste of time and money on my part. What do you guys think of this?

After reading up on it, I'm guessing the valve dropped into the cylinder. Seems like a common source of catastrophic engine failure for the Hemi. What do you guys think?

Either way, I will be getting a second opinion. The mechanic said he won't charge me to store the Jeep for a week or so while I figure out what to do. Luckily, I have a car I can borrow.

It's hard to justify spending $7k on a maybe $10k Jeep, no matter how much I love it.
 

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Is this local shop one you have used in the past and trust or is it a new shop? I don't have much to say about dealers since they told me my 06 was a classic and they had to search fora front differential in junk yards not their term, it it was definitely not not a new part, and that was after they claimed they replaced it once before and I can tell you it was not replaced. You are on the right track with a second opinion.
 

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Buy a cheap USB borescope on amazon. Pull the plugs and check for yourself takes maybe 30 minutes. I wouldn't take anything to a shop that says "something's loose in the engine" and then tells its a waste of time and money for them to actually look.

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I wouldn't take anything to a shop that says "something's loose in the engine" and then tells its a waste of time and money for them to actually look.
That's exactly what I was thinking when I read it, that's why I suggested getting a second opinion from a Jeep dealership.

Like Creek said, not all dealership's have their crap together either, but, there are some good ones around.

Just do your homework and read some reviews prior to picking one.
 

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Sorry to hear about your commander, I just had same exact problem happen several months ago, to my 06 hemi, quick stop, sounded like something was banging around inside motor. Second opinion is never a bad idea, but chances are it's a dropped seat valve, and all the scoping in the world won't help the situation, as it cheaper and easier to just put a new/used/reman longblock in it.
From experience, you will pay just as much for a junk yard pull which will ultimately drop another seat at some point, there are shops that sell reman longblocks (work of art when done right) with tighter tolerances to prevent valve seat issue from happening again.
I paid $2750 for a new longblock with tighter tolerances on the valve seats (3 year/ unlimited mile warranty) and my 06 hemi hasn't run this good since I orignally purchased it. No more hemi tick either.
Like mentioned above, do some research first on shops that know the 5.7l and know about the valve seat problems. It will save a lot of headaches in the long run.
Again sorry to hear about you XK
 

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Discussion Starter #8
So I took it to a different independent shop. They said they think it jumped timing. Quoted me $8400 for a Jasper engine. Not going to do it. Opinions anyone?
 

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Honestly, it depends how far you are willing to go, and by go I mean spend. Your best/safest bet is going to be a reman or a used engine. With a used engine you can plan on it happening again. From what I have figured the issue is with the valve seats not being large enough and the aluminum head expanding faster than the steel valve seat. It is also caused by over heating.

I dropped a valve seat back in March. I wasn't willing to drop 4 to 6 grand in the truck, when the it may barely pull that on the trade in. I bought some reman heads with the larger valve seats to help avoid it dropping a seat again. I only damaged one piston so I bought a piston from the dealer. I popped the heads off, dropped the oil pan, threw the new piston in, and threw the heads on. I ended up spending about $1200.00 or $1400.00.

This is an extremely simplified version of what actually happened. With the amount of work that went into it, I guess I could have swapped out the engine a couple of times. I do not recommend trying this method as it may not work for you. I read a lot of horror stories of dropped valve seats. There is pretty large thread over on lx forums about the issue.


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Discussion Starter #11
I paid $2750 for a new longblock with tighter tolerances on the valve seats (3 year/ unlimited mile warranty) and my 06 hemi hasn't run this good since I orignally purchased it. No more hemi tick either.
Like mentioned above, do some research first on shops that know the 5.7l and know about the valve seat problems. It will save a lot of headaches in the long run.
Again sorry to hear about you XK
Where did you get your long block? Sad part is, the second opinion shop didn't touch it. They just guessed that it jumped timing and then quoted me $8400. I was furious when I went over there and it had never been touched. Either way, I towed it to a friend's shop who will do the work on the side. He actually looked at it and found that the valve seat dropped on cylinder # 8. So I'm in the market for a long block. I've been looking at promar and this company called Hemi Pro that is selling long blocks on eBay. Suggestions anyone?
 

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Discussion Starter #12
Updating for anyone that needs the info...I guess I forgot to back then. If you drop a valve seat and need a new engine, you will likely need to spend $7000 to get a new one. Engine runs around $3000. I got mine from HemiPro, and I highly recommend. Labor and everything else was around $4000, and its very labor intensive. Long story short, I ended up with a new engine at 118k miles. I almost gave up on my XK, but when a mechanic low balled me on an offer to buy it, I got so mad that I had another mechanic do the work out of spite. Glad I did.
 

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Same thing happened to mine. 113,000 miles on my 06, no issues, no clue it would happen, always had maintenance done, oil changes etc. Sucks! Getting new refurb engine put in. Truck is in awesome shape, no rust and I had just put a lot of extras put on. So we are keeping it.
 

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Same thing happened to mine. 113,000 miles on my 06, no issues, no clue it would happen, always had maintenance done, oil changes etc. Sucks! Getting new refurb engine put in. Truck is in awesome shape, no rust and I had just put a lot of extras put on. So we are keeping it.
BenSmith said:
Updating for anyone that needs the info...I guess I forgot to back then. If you drop a valve seat and need a new engine, you will likely need to spend $7000 to get a new one. Engine runs around $3000. I got mine from HemiPro, and I highly recommend
That's a smart investment in my humble opinion, just make sure the garage that puts your engine in is reputable.

Case in point, there was another member that just recently had a rebuilt engine in put in (I believe it was also a Hemi) and wound up having intermittent starting problems.

It turns out that the shop/garage that did the work, did not properly ground the engine block to the chassis.

Having a reputable, proven shop do the work is just as important as having a rebuilt engine.

Also @BenSmith; you might consider posting the contact information for HemiPro for other members that might be interested, if you still have it. Thanks.
 

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Hey thanks! Yeah the garage that is putting it in is great and the one working on it builds and fixes race engines so I would hope he would know what he’s doing.
As far as problems with the 5.7 hemi engines in general, yeah... it’s a problem. Keep seeing lots of posts on many sites. And hearing from a lot of garage owners too. Shame... engines with less miles then mine too.. from what I heard, Chrysler knows about it, but haven’t seen any class action suits yet about it. And probably never will.. too expensive
 

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Discussion Starter #17
Pro Engines LLC, Elon, NC (336) 792-5521 They sell engines on eBay if you look there. They specialize in Hemis and the 4.7L. They will also do installs if you’re on the East coast.
 

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Are there any warning signs to look out for? I'm about to hit 110k on my 06. I've had it in the back of my mind every now and again that this could happen.
 

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Discussion Starter #20
Are there any warning signs to look out for? I'm about to hit 110k on my 06. I've had it in the back of my mind every now and again that this could happen.
Mine never had ANY issues prior. Never ran hot, never missed, never ticked. I was religious on maintenance. At 100k I replaced literally all fluids, plugs, etc. It really came out of nowhere. It’s just a fatal design flaw of over head valves.
 
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