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Johnny Raptor

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I'm at 186k...moving valve springs up the list. How bad did the piston and bore look??

Sorry, but I didn't get any photos when we scoped it.

Piston is in several pieces somewhere in the bottom end along with the valve. Bore is pretty roughed up; lots of shavings and a couple of gouges. Bottom of liner has a tear in it from an impact. Also, didn't get a look at the rod, but I'm guessing it's bent.

I'm not really a motor guy, but it looks pretty bad to my untrained eye.
 

RC51TOFUMAN

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Been a while since I've checked out the forum, but thought I'd chime in on this thread.

Bought a 2013 Screw new in August 2013 and have enjoyed every mile! Currently have 192K on it, and have only had a couple of minor issues until earlier this week.

Replaced inner and outer pinion bearings in the rear end and replaced a rear wheel seal at 125K. Otherwise, it's been standard maintenance such as oil and filter (Mobil 1) every 10K, transmission flush and filter at 75k and 150K, new plugs at 100K and 191K (2 weeks ago), and a couple of sets of brake pads and a new set of rotors.

Earlier this week, I was leaving work when it dropped a valve with no warning. Was cruising on a 2 lane road at 45 mph under no load. Truck vibrated for maybe 30 seconds (felt like a flat front tire), then completely died. Immediately shifted to neutral and coasted to a stop. After getting it towed back to the shop, we pulled the valve covers and found a broken spring on #6. Removed the mangled spark plug, then scoped the bore to take a peek at the carnage.

Looks like I'll be adding an engine replacement to the list, and am also considering a transmission rebuild while it's in the shop.
Engine replacement or Rebuild?
Which are you going to go for?

Sent from my SM-G991U using Tapatalk
 

BenBB

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Sorry, but I didn't get any photos when we scoped it.

Piston is in several pieces somewhere in the bottom end along with the valve. Bore is pretty roughed up; lots of shavings and a couple of gouges. Bottom of liner has a tear in it from an impact. Also, didn't get a look at the rod, but I'm guessing it's bent.

I'm not really a motor guy, but it looks pretty bad to my untrained eye.
I'm not either, at least on these, certainly does NOT sound good! Best of luck, let us know how it goes...
 

Canuck714

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I tell myself I'd like to just rebuild it if possible, but then I find myself on the Livernois site again drooling over that 6.6 stroker!

Dang thats No Bueno Johnny.
It seems we have had a few engine failures recently. You basically have 3 choices...

1. buy a low milage 6.2 longblock and swap it in
2. find a good engine shop and rebuild your engine with some good Manley rods and Diamond pistons.
3. Pay a dumb amount of $$ to Livernois and wait 5-6 months for a slightly larger 6.6 stroker

Ive said it before, but if the block is salvagable, and you have a good engine machine shop... build it with good parts.
 

Johnny Raptor

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Dang thats No Bueno Johnny.
It seems we have had a few engine failures recently. You basically have 3 choices...

1. buy a low milage 6.2 longblock and swap it in
2. find a good engine shop and rebuild your engine with some good Manley rods and Diamond pistons.
3. Pay a dumb amount of $$ to Livernois and wait 5-6 months for a slightly larger 6.6 stroker

Ive said it before, but if the block is salvagable, and you have a good engine machine shop... build it with good parts.[/QUOTE


Thanks for the input. No Bueno is right! We found a chunk blown out of the block on the passenger side that we missed on first glance. It didn't really drop any oil or coolant, which is really surprising, so thought the block was OK. Unfortunately, it's trashed. One bright spot, though, is that my daughter asked if I'd save it for her when we pull it so she can learn how to tear a motor apart. That right there makes a father proud!

I'm thinking the build will be a combination of options 1 & 2. Hope to find a decent block and rebuild it with Manley H-beams, Diamond pistons, and possibly Livernois cams. We've got a top notch engine shop in town that's built several 6.2's and I've got a fantastic mechanic shop I've dealt with for 30+ years, so am going to keep everything local if at all possible.

The Livernois package is really appealing because it seems to be a proven, complete turnkey solution, but it's BIG $$ and they're a LONG way away if I have problems and need to go back and see them. Plus, I'm guessing it would cost me at least a grand to ship the truck to them for the install.

When I bought the truck in 2013, I wasn't really a fan of forced induction because it was my primary work truck and operated in very dusty conditions every day. Was really concerned about premature engine wear (not sure it was justified, but felt that way). I drove a friends Roush stage 2 and loved it, but didn't see the need to spend and additional 10K on a brand new truck. Guess maybe that's why I've always leaned toward a NA stroker like the Livernois 6.6. If I was going to have to to do engine work, the 6.6 is more HP than stock and can accommodate a SC if I want to add it later.

Fast forward to today, though: I've changed jobs and commute 20 miles to work and occasionally take short 4-500 mile day trips- all on pavement. The only time I really go offroad any more is during hunting season, and even then it's very mild conditions compared to a lot of guys on here.

TLDR; Since I've already got to spend a *** of cash building a motor, I'm starting to think I may get more bang for the buck by building a solid 6.2 and sticking a Whipple on it instead of going with the NA Livernois 6.6. Don't have much experience building motors, though, so may be way off.
 

Canuck714

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Find a lower mile 6.2, swap in good valve springs and toss on a Whipple.
The blower will outpace any built NA and probably wind up the same price..lol
 
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