rjp
Go or Blow
Thanks for the help,something different here that i am not accustom to.Ill figure it out one day.
6.7 Destruction
- Thread starter rjp
- Start date
Thanks for the help,something different here that i am not accustom to.Ill figure it out one day.
chris lang
New member
Just recently lost the bottom end of my 6.7. My truck is in the 900+ hp range and and I'm in the process of rebuilding.If there is anyone in the know of how much piston to valve clearance is needed,are preferred i would greatly appreciate some advice.Here is a pic of the drivers side view.
Thanks in advance for any help.
Official 68RFE Suncoast Test Truck
well theres your problem right there...
Big Blue24
Comp Diesel Sponsor
Did you tack-weld the freeze plugs? If so, sounds easier than drilling and pinning them in.
rjp
Go or Blow
They are all drilled and pined.I did not pin the ones that are accessible so that if one needed to blow it could and still be changed without to much of a hassle.
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rjp
Go or Blow
Thanks!!!!!
rjp
Go or Blow
Here is the head drilled and tapped.
This is the only one that you can really see,i will get some others later.
rjp
Go or Blow
This will be the last of the carnage pics as it will be in the scrap iron pile tomorrow.Everything has been taken off that was usable and the rest is just junk.
This one is from the good side and really gives the term windowing a block justice as the light shines through.
And last one will be the one rod that made it threw the wreck with a slight bend.
This one is from the good side and really gives the term windowing a block justice as the light shines through.
And last one will be the one rod that made it threw the wreck with a slight bend.
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M_Thomas07
CompDEX
RJP i don't know if you have kids or not, but if so, the age old saying about daddy not being a window maker does not apply in your case. LOL
rjp
Go or Blow
No clipping here.I have my own beliefs about this.The pump is not the issue,it is not capable of building enough pressure to blow a freeze plug.It is a combination of aerated coolant and heat witch always happens close to the area where the most heat is gathered.(TURBOS)I will be using the kit from Shane to keep the that pressure equalized and under control.
So my theory is the pump aerates the coolant under high rpms witch i guess you could say its a pump issue, but not a issue that we could really do anything about except for maybe slowing it down witch may hurt the amount of flow needed to cool.Once this aerated coolant is made it tends to migrate to the back of the block,the way the gasket is constructed it only allows very little coolant to come up in the front of the head where it then gets more flow in each cylinder as you continue to the back of the head.All of these passage ways just add to the aeration that is already induced by the pump.So now you have air in the system witch is now in the rear of the head and just so happens to flow right by the exhaust ports along with the exhaust housing of the turbo that is right next to the #4 and #5 cylinders.Steam has now been made in the back that expands faster than what is going on in the front witch then blows a freeze plug.Any how this is my thoughts witch some may not agree but until someone proves it any different I'm sticking with the above.This is why i went with Shanes bypass as i think its the best option today.
rjp
Go or Blow
I lost a engine in one of my c&c trucks and bought a pull out for 5k,i then bought the engine out of my truck for 600.00 bucks,this was the core.So i had a whole engine to work with,all i used was the block and running gear from the old engine as the crank was no good.
rjp
Go or Blow
Trust me i would much rather this had not happened.
aer212
New member
When I brought my head in to get re machined for a different side mount the guy asked me if I knew what caused freeze plugs to blow. I said well from everything I read and understand, the cause is coolant pressure. He said nope, what causes it is cylinder pressure getting into the coolant passages. Otherwise known as a blown headgasket or the head lifting. Any thoughts on this? By the way he is a well known high performance gas engine builder.
rjp
Go or Blow
I would say it sounds good but there is nothing to support this theory.I have known and herd of many head gaskets blown with not a one freeze plug.I my self got a freeze plug with fire rings and did not have a blown head gasket.I drained the $hit out of the motor and fixed the freeze plug and ran the truck another 40 something thousand miles before the bottom fell out.It does sound good but i don't see it.
aer212
New member
Do you have a link for the EEP?