cracked 53 blocks fixed under warranty and out of warranty - Dodge Cummins Diesel Forum
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post #1 of 56 (permalink) Old 12-16-2010, 04:10 PM Thread Starter
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cracked 53 blocks fixed under warranty and out of warranty

I was just wondering how owners with cracked 53 blocks got their trucks fixed both in and out of warranty, how old and how many miles? I talked with a person named Nathan at Cummins hq last week and he said about 1% of the 53s cracked with most being replaced on warranty with crate motors. My question is if you had one of the infamous 53s that cracked how did you fix it?


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post #2 of 56 (permalink) Old 12-16-2010, 05:26 PM
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loc n stitch!
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post #3 of 56 (permalink) Old 12-16-2010, 05:37 PM
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If you're out of warranty (150 000 miles on 53 blocks) you have a couple options. Lock N Stitch if you plan on keeping the block but this method has been hit and miss, probably has something to do with the pre and post weld heat treatments (IMHO). If you plan on scrapping the block but still need to drive it I put it out there that you could jam wood in the crack and it will seal up when it gets wet (haven't heard anyone actually try this) and cover with JB weld over the wood. Some people have just tried JB weld with poor results so that's why I suggested getting the wood in the crack first.

Cast iron is a beotch to weld reliably from what I understand. If I had to, I'd probably replace the block eventually and would personally try the wood/JB Weld trick my self but my 53 isn't cracked.

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post #4 of 56 (permalink) Old 12-16-2010, 05:57 PM
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I'd be afraid of the crack spreading if you jam wood in there and it expanded when it got wet? Cast iron is indeed a pain to try and weld. Seems a big part of it is a slow heating and cooling process from what I have hear.

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post #5 of 56 (permalink) Old 12-16-2010, 06:00 PM
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Originally Posted by BigBadTurboI6 View Post
I'd be afraid of the crack spreading if you jam wood in there and it expanded when it got wet? Cast iron is indeed a pain to try and weld. Seems a big part of it is a slow heating and cooling process from what I have hear.
Drill out the ends of the crack but even that's not 100%. I would hate for the crack to spread more too using wood in there, but if you've got a buggered block that's puking coolant, you ain't got much to loose (like I said it's a suggestion to get someone by if they do plan on replacement or are really tight on money).

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post #6 of 56 (permalink) Old 12-16-2010, 06:55 PM
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i used bars stop leak. it slow it down some. i might try another bottle of it.

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post #7 of 56 (permalink) Old 12-16-2010, 07:06 PM
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I bought mine cracked with 154000 on the clock. I've repaired it with the lock-n-stitch kit and their reinforcement bracket. Had a 7 inch crack. I've only been able to put about 1000 miles on it since the repair since my VP just went out but it's holding up well so far.

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post #8 of 56 (permalink) Old 12-16-2010, 10:50 PM
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I bought mine cracked with 154000 on the clock. I've repaired it with the lock-n-stitch kit and their reinforcement bracket. Had a 7 inch crack. I've only been able to put about 1000 miles on it since the repair since my VP just went out but it's holding up well so far.
Contact Cummins, maybe they'll stretch the warranty a bit for you. Nothing to loose, a crate engine to gain.

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post #9 of 56 (permalink) Old 12-16-2010, 11:13 PM
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How much is a new crate block?

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post #10 of 56 (permalink) Old 12-16-2010, 11:44 PM
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How much is a new crate block?
Not sure but you can pick up a decent long block on here for usually around $2k - $3k. Can't imagine a crate engine or the block being cheap at all.

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post #11 of 56 (permalink) Old 12-16-2010, 11:48 PM
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Quote:
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Contact Cummins, maybe they'll stretch the warranty a bit for you. Nothing to loose, a crate engine to gain.
not if he's already lock and stitched it. they wont touch it after that.

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How much is a new crate block?
ive seen complete 24 valves out of buses and stuff like that for around 2-2500. they are the same motor out of our trucks.

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post #12 of 56 (permalink) Old 12-17-2010, 12:23 AM
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not if he's already lock and stitched it. they wont touch it after that.
Oooops, missed that even though I read it. Ahhhh brain is fried.

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