Trav-O
New member
Many people having cracked blocks on the 6.4Ls? I guess my the block is cracked on my 6.4...
Cracked Block
- Thread starter Trav-O
- Start date
Trav-O
New member
I was told hairline cracks at the studs. Teflon paste didn't work, crankcase filling with water now. When I bought the truck, had an oil sample done. All elements came back good. Now 1,900 miles later, I have a cracked block.
This might be end of my diesel days, I am spent and didn't get to enjoy my truck at all.
This might be end of my diesel days, I am spent and didn't get to enjoy my truck at all.
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Powerstroked162
On Da Juice
Did you do the install or another shop? That sucks to hear either way.
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HD F250
Active member
Uh oh, hope this isn't a new trend. Glad I got a warranty coming with my build.
78f100
Active member
Anyone know why they are cracking?
Sure wish I could tell you
Head studs can't be blamed these two had both brands of studs
Not sure to me the cracks look.like they are from forces pulling on block near the head stud...and not from the stud torque, more like cylinder pressure.
Wish I knew if this is going to be an issue
Head studs can't be blamed these two had both brands of studs
Not sure to me the cracks look.like they are from forces pulling on block near the head stud...and not from the stud torque, more like cylinder pressure.
Wish I knew if this is going to be an issue
02BigD
New member
Same tuner on both?
AllanB
New member
Anyone know what the mods were on both trucks? How much boost they were running? I know there are several of y'all running quite a bit of boost and hp. If it were going to be something that shows up in most 6.4's, looks like it would have already showed up to me.
To the OP. Hate to hear that for ya Bud. Really does suck to get bad news like that.
To the OP. Hate to hear that for ya Bud. Really does suck to get bad news like that.
The one had every tuning available since day one.
It's a 900 HP truck max boost of about 60, compounds always had made good torque. We kinda thought maybe allot of high horse power miles... Didn't want to freak people out about it.
Not sure how much more I can say about it def not the biggest build several others like it daily driven Truck
It's a 900 HP truck max boost of about 60, compounds always had made good torque. We kinda thought maybe allot of high horse power miles... Didn't want to freak people out about it.
Not sure how much more I can say about it def not the biggest build several others like it daily driven Truck
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I know where another cracked one is. :doh: A well known shop owner told me this when I asked about it: From what we have seen the casting is thin in some of the upper headbolt areas. Some trucks are ok, others no way. The teflon paste fixes it and so far we haven't seen any issues after doing that.
mike@haller's
New member
The paste only stops it from coming up the threads of the stud. Once the crack spreads to the galley right in front of the lifters, the paste doesnt work any more.
jdgleason
Active member
Wonder if this is a situation where cryo treating the block might help at all?
weekendwarriorfsw32
New member
Could it be from some one not blowing out the holes when they did head studs and that water and oil in hole still when the stud was installed and torqued it cracked then?
jdgleason
Active member
Not in the couple cases that I know of.
HD F250
Active member
My thoughts exactly. I might have to make a call and see what the cost is. :cursing:
jdgleason
Active member
Sent you a text.
mike@haller's
New member
On the block that cracked the holes were clean and dry. Were gonna try cryoing but I dont think it will stop this kind of failure.
