cracked a piston - Ford Powerstroke Diesel Forum
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post #1 of 17 Old 08-18-2013, 05:17 PM Thread Starter
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cracked a piston

well boys and girls it finally happened. Cracked the #3 piston. cylinder doesnt look too bad but has lost cross hatching. My issue is this, i have a line on a set of brand new in box rudys coated pistons standard size that retail at 1570. i can get them from a kid that went a different route for 900. this however take my ability to bore to .020 over. Can the 6.4 be re-sleeved to bring cylinder 3 back to stock size allowing me to use these pistons available to me? if so can i just get the one cylinder re-sleeved? can a machine shop do the job and what i am looking at ballpark to sleeve? ive heard they can knock the sleeve out and replace it for a few hundred? also if all this is miraculously possible, where would i get a sleeve? cant find on ford parts website. thanks a ton guys

08 6.4 F-250
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post #2 of 17 Old 08-19-2013, 04:45 AM
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6.4 is a parent bore block, so no sleeves. And I don't think the wall thickness is enough at the skirt to be able to sleeve a block back to stock
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post #3 of 17 Old 08-19-2013, 09:25 AM Thread Starter
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Ok thanks. I was hoping to bore .080 over and sleeve back to stock but looks like ill go .020 over all around if she's egged out. Anyone have experience with the coated mahle pistons from Rudy's? Good product? Upgrade from oem?


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08 6.4 F-250
ARP studs
Rudy's coated/machined pistons
CX Aluminum intercooler
No Limit ic pipes
ccv Reroute
AFE MF intake
PTP EGR delete w/ elbow
Diamond Eye 5" dp back with MBRP 7" tip
H&S Mini HD300
PATC triple disc billet tc
PATC stage 3 built trans
6" 4-link rough country lift
PMF stage 2 trac bars with gussets and block mount
20x10 XD Revolvers with Federal 35 MTs
Advantage Max-4 wrapped bumpers/grille
Reflexxions steel cowled hood
5% tint
Kenwood nav/dvd
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post #4 of 17 Old 08-19-2013, 01:04 PM
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I have yet to hear of anyone having problems after they upgrade their pistons to Rudy's or international. Some even machine the lip off the stock pistons and are good to go.

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post #5 of 17 Old 08-19-2013, 02:42 PM Thread Starter
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The Rudy's only come in a stock bore though they have mahle for bigger bores. Is mahle a good piston? Just kinda sucks cause they are 1825 coated and the Rudy's are 1500 and I can get em for 900 from a buddy that ordered and went a different route. Just hoping mahle is good if I have to go that route?


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08 6.4 F-250
ARP studs
Rudy's coated/machined pistons
CX Aluminum intercooler
No Limit ic pipes
ccv Reroute
AFE MF intake
PTP EGR delete w/ elbow
Diamond Eye 5" dp back with MBRP 7" tip
H&S Mini HD300
PATC triple disc billet tc
PATC stage 3 built trans
6" 4-link rough country lift
PMF stage 2 trac bars with gussets and block mount
20x10 XD Revolvers with Federal 35 MTs
Advantage Max-4 wrapped bumpers/grille
Reflexxions steel cowled hood
5% tint
Kenwood nav/dvd
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post #6 of 17 Old 08-19-2013, 02:45 PM
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Might I ask how exactly you melted the piston? Stuck injector or did you run it hard?
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post #7 of 17 Old 08-19-2013, 08:30 PM Thread Starter
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Probably both. Long story short I got a cylinder 3 contribution code at a truck pull last year. Went away and everything seemed fine. 2 months later she needed a cyl 3 injector. No big deal until 2 months ago when I did the CCV mod and saw the stupid amount of blow by. Had plans of tearing down once work slowed down, I'm a contractor and its my work truck as well as dd. nothing works as planned and she gave out last week. I think it may have cracked last summer and finally pieces broke away last week. The piston was cracked all the way through with small chunks missing and the bowl was melted away. I assume it cracked when then and as I drove on the bad injector, I melted the bowl away weakening everything and over time she gave out totally.


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08 6.4 F-250
ARP studs
Rudy's coated/machined pistons
CX Aluminum intercooler
No Limit ic pipes
ccv Reroute
AFE MF intake
PTP EGR delete w/ elbow
Diamond Eye 5" dp back with MBRP 7" tip
H&S Mini HD300
PATC triple disc billet tc
PATC stage 3 built trans
6" 4-link rough country lift
PMF stage 2 trac bars with gussets and block mount
20x10 XD Revolvers with Federal 35 MTs
Advantage Max-4 wrapped bumpers/grille
Reflexxions steel cowled hood
5% tint
Kenwood nav/dvd
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post #8 of 17 Old 08-20-2013, 04:11 AM
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Mahle is a good piston, the coating they put on is more of a sales gimmick. I haven't seen any notable benefits from them. Except when they break...they get just as fubar'd


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post #9 of 17 Old 08-24-2013, 12:12 PM
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Quote:
Originally Posted by fiderius22 View Post
Probably both. Long story short I got a cylinder 3 contribution code at a truck pull last year. Went away and everything seemed fine. 2 months later she needed a cyl 3 injector. No big deal until 2 months ago when I did the CCV mod and saw the stupid amount of blow by. Had plans of tearing down once work slowed down, I'm a contractor and its my work truck as well as dd. nothing works as planned and she gave out last week. I think it may have cracked last summer and finally pieces broke away last week. The piston was cracked all the way through with small chunks missing and the bowl was melted away. I assume it cracked when then and as I drove on the bad injector, I melted the bowl away weakening everything and over time she gave out totally.


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What did it do when it finally came apart ? Just curious because I haven't had any codes with my truck at all . It just started feeling like its down on power . It is also seeing some very high egt's if I get on it . The funny part is if I am just driving it normal everything reads normal . Nothing gets out of line if you just drive it normal . It just feels like you are pulling a trailer all of the time.

07 F-250 Outlaw , Rough Country 6 inch lift , 37-13.5 R20 Nitto Mud Grapplers , MBRP 5" Exhaust , 08 Mirrors , S&B intake , 5% Tint sides and back , 35% windshield .

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post #10 of 17 Old 08-24-2013, 12:47 PM Thread Starter
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Well here's the thing. It was most likely cracked for a long time. You'll know when it goes all the way. White smoke that'll shut a road down and it'll miss like crazy and there WILL be codes. Good indicator of your issue is to check blow by. Drive it til it's up to temp and pull the oil fill cap and see what's what.


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08 6.4 F-250
ARP studs
Rudy's coated/machined pistons
CX Aluminum intercooler
No Limit ic pipes
ccv Reroute
AFE MF intake
PTP EGR delete w/ elbow
Diamond Eye 5" dp back with MBRP 7" tip
H&S Mini HD300
PATC triple disc billet tc
PATC stage 3 built trans
6" 4-link rough country lift
PMF stage 2 trac bars with gussets and block mount
20x10 XD Revolvers with Federal 35 MTs
Advantage Max-4 wrapped bumpers/grille
Reflexxions steel cowled hood
5% tint
Kenwood nav/dvd
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