Another cracked piston

webb06 · Dec 15, 2013

Bustedknuckles said:
You need to check compression for sure. A buddy of mine owns his own shop and did about 10 grand worth of work on a customers truck (ported heads, RCD turbo's, springs, pushrods, manifolds and up pipes head studs etc) and it cracked a piston on the first test drive with the H&S still on stock.....

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Ouch Charlie

6.4strokin · Dec 15, 2013

Bustedknuckles said:
You need to check compression for sure. A buddy of mine owns his own shop and did about 10 grand worth of work on a customers truck (ported heads, RCD turbo's, springs, pushrods, manifolds and up pipes head studs etc) and it cracked a piston on the first test drive with the H&S still on stock.....

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Stock pistons?

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Bustedknuckles · Dec 15, 2013

6.4strokin said:
Stock pistons?

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Yea.

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WoodBoy · Dec 15, 2013

Bustedknuckles said:
You need to check compression for sure. A buddy of mine owns his own shop and did about 10 grand worth of work on a customers truck (ported heads, RCD turbo's, springs, pushrods, manifolds and up pipes head studs etc) and it cracked a piston on the first test drive with the H&S still on stock.....

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Thanks for the uplifting post...

LOL

6.4strokin · Dec 15, 2013

I think doing any build on a 6.4 replacing pistons is a must

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Morgan@Midwest Diesel & Auto · Dec 15, 2013

They do seem to becoming the biggest weak point in higher hp builds.

Dzchey21 · Dec 15, 2013

6.4strokin said:
I think doing any build on a 6.4 replacing pistons is a must

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I think if you buy a 6.4 period and it needs to be reliable its a must

Rmartin-97 · Dec 15, 2013

I don't think I ended up with a cracked piston. I jumped to a conclusion.

powerstrokin15 · Dec 15, 2013

Dzchey21 said:
I think if you buy a 6.4 period and it needs to be reliable its a must

this. I've seen more on trucks just tuned than higher HP. mine included

Eric@HoldersDiesel

forcefed6.4ford · Dec 15, 2013

I think the heat cycling is what causes failures. Jumping on the throttle and spiking the egts and chopping the throttle and shocking the piston face with cold inlet temps.

TyCorr · Dec 15, 2013

forcefed6.4ford said:
I think the heat cycling is what causes failures. Jumping on the throttle and spiking the egts and chopping the throttle and shocking the piston face with cold inlet temps.

How are egts on those trucks. They seem to.get warm from.what people have told me, alas, I do not know personally.

A friend of mine with deletes and tuning said his.gets up to 1k° just accelerating to interstate speeds!

seems like a fairly hot system especially considering the sequential turbos.

Just looking to learn a little something!

forcefed6.4ford · Dec 15, 2013

I can/could peg my pyro easily. My 08 has maxed it out on several occasions. These truck have some much fuel vs air.

I keep Lil Donkey under 1250.

B585Ford · Dec 16, 2013

forcefed6.4ford said:
I think the heat cycling is what causes failures. Jumping on the throttle and spiking the egts and chopping the throttle and shocking the piston face with cold inlet temps.

Couldn't agree more....and poor piston design

jdgleason · Dec 16, 2013

Trucks with DPF's on them run like 1350* in regen at an idle sitting at a stoplight.

They are no stranger to high temps.

Mine gets to 16XX* at the end of the track with dual pumps at altitude.

webb06 · Dec 16, 2013

jdgleason said:
Trucks with DPF's on them run like 1350* in regen at an idle sitting at a stoplight.

They are no stranger to high temps.

Mine gets to 16XX* at the end of the track with dual pumps at altitude.

Have you actually monitored this? I asked an instructor I had about this and he said that its wrong and that the real heat is in the dpf

HD F250 · Dec 16, 2013

Rmartin-97 said:
I don't think I ended up with a cracked piston. I jumped to a conclusion.

What was your issue?

jdgleason · Dec 16, 2013

webb06 said:
Have you actually monitored this? I asked an instructor I had about this and he said that its wrong and that the real heat is in the dpf

Mike Haller's old blue truck got the dpf put back on it, but he still had a dashdaq - he said it showed like 1350*

Rmartin-97 · Dec 16, 2013

HD F250 said:
What was your issue?

I think the miss had somthing to do with the crank case bein over full. I drained the crank case and it doesn't miss any longer. It idles fine now to. Just been lettin it idle with the cake covers off makin sure no fuel is leaking from any lines or anything.