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post #11 of 14 Old 01-01-2013, 06:03 PM
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Originally Posted by Jonny View Post
Seems to be about the mileage many of these 5.7L Hemi engines grenade, due to the valve seats coming loose from the heads... That would be a design flaw, not an initial assembly failure.

I would assume by "assembly failure" they meant the assembly (rotating?) failed, not a failure due to incorrect initial assembly...
I'm thinking that a valve seat is what failed, and they're just telling the OP a basic reason to "not get too technical" ... the receipt should have the tech's findings in his own words, although they may have been edited by whoever printed the final receipt.

My car had performance heads and still dropped a valve seat with only about 20-25k miles on those particular heads, about 45k miles on the engine.
Needed a new engine.
About $4k later, after another $4k in earlier repairs from a broken valve spring, the car got traded in since I lost faith in its reliability ... I miss the AWD, but my FWD Focus has been awesome so far in the snow, and the Mustang is a lot more fun than the Charger ... completely different animal of course, but still ...

Past, mine: 2007 Charger R/T AWD, heads/cam, hi-flow cats, full JBA exh., 6.1 injectors, a few other things. 355 AWHP, 370 AWTQ
Present, mine: '13 Mustang GT, Sterling Gray, MT82, Recaros, Track Pack. 2.3L Whipple, VMP heat exchanger, ID1000 injectors, JLT CAI, 591 RWHP, 505 RWTQ.
- Bad-weather ride: '06 Tundra 4x4 V8 AccessCab, Silver.
Present, GF's: '08 GT500, White/blue stripes, pulley/JLT CAI/tune, ~550RWHP/~540RWTQ.
- Bad-weather ride: '03 Forester, green, 5-speed.
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post #12 of 14 Old 01-02-2013, 04:50 AM
Join Date: May 2012
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I would think assembly failure to be the long block. I always ask for replaced parts to be returned to me. I have the failed seat that did my motor in. About 1/4 of the seat disintegrated. I still drove the car about 30 miles home. My machinist knew the problem before I dropped the motor off. To avoid a repeat all seats were pinned. Was back on the road for under 2k.

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post #13 of 14 Old 01-02-2013, 08:44 AM
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I am at 127,000 and have not had any engine related failures like this. Car still hums down the road. Any engine can fail from any manufacturer at any time.

07 R/T, Spoiler, Daytona Insert, Glove box light, Mopar Fender CAI, Hood struts, Cabin Air Filter
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post #14 of 14 Old 01-02-2013, 11:14 AM
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Originally Posted by Scott View Post
I am at 127,000 and have not had any engine related failures like this. Car still hums down the road. Any engine can fail from any manufacturer at any time.

It's good to hear stuff like this, because I definitely don't like preparing myself for a time bomb. I have seen several people in the 100,000+ club, so that makes me feel a little better. 06 Top_Banana, Sorry about your bad experience though.

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