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Old 01-21-2014, 05:48 PM
chesterstroker chesterstroker is offline
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Attention Engine Builders

Hey guys, I'm looking for some input on rebuilding my 6.4. I cracked number eight piston. Just looking for opinions on what pistons to use and what else everyone recommends doing while I have it tore down. It is deleted already. I plan on for sure doing head studs. This build is on somewhat of a budget but I plan on keeping the truck for a long time so I want it to last.

Thanks in advance, Jamie
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Old 01-21-2014, 06:09 PM
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What tune was in your truck when this happened,I think we are starting to see a trend here…..
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Old 01-21-2014, 06:18 PM
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Cracking pistons was one of the factors for me to sell my 6.4. It is a pretty common issue with tuned trucks. If you can stay with stock sizes, you have plenty of options. If you have to bore, atleast de-lip and ceramic coat. Give Morgan @ Midwest Diesel a call.
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Old 01-21-2014, 06:32 PM
chesterstroker chesterstroker is offline
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Originally Posted by slowmans View Post
What tune was in your truck when this happened,I think we are starting to see a trend here…..
Running the HD300. For what its worth, I wasn't pushing it hard when it happened. It just started missing and blowing tons of white smoke. Im wondering if an injector stuck open...
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Old 01-21-2014, 07:13 PM
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Im betting its the tuning, starting to see a lot of guys running H&S on other forums cracking pistons as well…..good luck bro!

Im not trying to point fingers here just stating what I have read, others may have had issuers with other tuners/tunes.
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Old 01-21-2014, 07:56 PM
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Quote:
Originally Posted by chesterstroker View Post
Running the HD300. For what its worth, I wasn't pushing it hard when it happened. It just started missing and blowing tons of white smoke. Im wondering if an injector stuck open...
Could be an injector. Check your blow by. That will give a good indication on what you are facing.
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Old 01-21-2014, 08:06 PM
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not saying your like this but most guys get the tuners...drive the **** out of them...they break... then it's I drove it like miss daisy all the time.. I've had my mini maxx for almost 10,000 miles...drives perfect I've stayed with the 250hp tune... just curious what's your mileage?? good luck also!
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Old 01-21-2014, 08:21 PM
chesterstroker chesterstroker is offline
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Originally Posted by UGA33 View Post
Could be an injector. Check your blow by. That will give a good indication on what you are facing.
I have engine pulled already. Number eight is cracked all the way across. I looked through glowplug opening with borescope. I haven't pulled heads yet to check cylinder.
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Old 01-21-2014, 08:26 PM
chesterstroker chesterstroker is offline
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Originally Posted by STROKINMY'08 View Post
not saying your like this but most guys get the tuners...drive the **** out of them...they break... then it's I drove it like miss daisy all the time.. I've had my mini maxx for almost 10,000 miles...drives perfect I've stayed with the 250hp tune... just curious what's your mileage?? good luck also!
I hear ya fella...I don't drive the **** out of this one. I'm usually trying for best fuel mileage with the cost of diesel now. The truck has 140k on it. I've had my minimaxx on mine for over 20,000 and it ran perfect until this too.
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Old 01-21-2014, 08:34 PM
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Quote:
Originally Posted by STROKINMY'08 View Post
not saying your like this but most guys get the tuners...drive the **** out of them...they break... then it's I drove it like miss daisy all the time.. I've had my mini maxx for almost 10,000 miles...drives perfect I've stayed with the 250hp tune... just curious what's your mileage?? good luck also!


True that. Tuner forums always have their share of guys complaining that they blew their engine in some fashion, after punching a button and dumping an extra 300+ HP into the stock drivetrain. Generally followed by accusations that somehow the tunes and/or tuner is defective in some fashion.

Big tunes + stock drive train + silly right foot = Trip to the repair shop.
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Old 01-21-2014, 08:34 PM
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Originally Posted by chesterstroker View Post
I have engine pulled already. Number eight is cracked all the way across. I looked through glowplug opening with borescope. I haven't pulled heads yet to check cylinder.
Whoops. Get some good pistons in there. I would also throw some new lifters in it and do a good seal on the bed plate when going back together and call it a day.
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Old 01-21-2014, 08:37 PM
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lol I hear ya man.. I'm in the same boat.. slowmans kind of got me worried for a minute.. saying that a lot of hs guys we're having this problem.. I googled it seen some issues..but it was mainly guys who've turned there trucks into race trucks..any way wish the best of luck.. I found this thread with quite a few guys talking of cracked pistons/mini maxx's maybe it'll help...or one of them could let ya know Another cracked piston - PowerStrokeArmy
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Old 01-21-2014, 08:56 PM
chesterstroker chesterstroker is offline
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Originally Posted by STROKINMY'08 View Post
lol I hear ya man.. I'm in the same boat.. slowmans kind of got me worried for a minute.. saying that a lot of hs guys we're having this problem.. I googled it seen some issues..but it was mainly guys who've turned there trucks into race trucks..any way wish the best of luck.. I found this thread with quite a few guys talking of cracked pistons/mini maxx's maybe it'll help...or one of them could let ya know Another cracked piston - PowerStrokeArmy
Thanks bud...I'll keep ya posted after I tear it down. I absolutely love how these trucks run after deleted. Gotta pay to play I guess
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Old 01-21-2014, 09:23 PM
chesterstroker chesterstroker is offline
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So back to my original question...I'm looking for advice on pistons. Looks like coated stockers, Rudy's Diesel, and International seem to be the most common. Just curious as to which is best and why.
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Old 01-22-2014, 08:37 AM
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Check those rocker arms for wear while you are at it.

One of the reason I never ran big HP on mine.
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