The Rebuild Thread
Thread Starter
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Senior User
Joined: May 2009
Posts: 110
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From: Osceola, WI
Good deal Mike!
Grabbed a few shots of the truck as of now. I wanted to get more done tonight but I'm beat. Got the Radiator and intercooler out and a bunch of small stuff unhooked.
The parts bin....
Here are two pictures of each intake. As you can see one is more of a gloss black from all the oil.
Found many things that are pretty rigged up on this truck... cant wait to get in there and do things the right way.
Grabbed a few shots of the truck as of now. I wanted to get more done tonight but I'm beat. Got the Radiator and intercooler out and a bunch of small stuff unhooked.
The parts bin....
Here are two pictures of each intake. As you can see one is more of a gloss black from all the oil.
Found many things that are pretty rigged up on this truck... cant wait to get in there and do things the right way.
Thread Starter
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Senior User
Joined: May 2009
Posts: 110
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From: Osceola, WI
Well me and Mike (Ford79) got a lot done today. Motor was pulled, put on the stand then torn down to see some very interesting things. Always makes it more exciting tearing down an engine and seeing this sort of destruction.
What we found was not good. Every single piston has something wrong with it. Whether it be hitting the valve, crack, detonation, or debris damage... or a combo. Take a look for yourselves, open to your opinions.
#3 was the worst, middle ring was gone, oil ring was bearly there, and the middle ring land was also gone for the most part.
The bores look good, can still see a lot of crosshatch, all measured up to be extremely close to the same bore on the dial gauge, going to get a measurement when i bring my 4" mic. to the shop tomorrow.
Ready to come out
Mike hard at work... well play? haha. Cant say thanks enough for all the work he put in to help me out!
Cylinder #2
#4 (cylinder that had pushrods break)
#6
#8
#7
#5
#3
#1
What we found was not good. Every single piston has something wrong with it. Whether it be hitting the valve, crack, detonation, or debris damage... or a combo. Take a look for yourselves, open to your opinions.
#3 was the worst, middle ring was gone, oil ring was bearly there, and the middle ring land was also gone for the most part.
The bores look good, can still see a lot of crosshatch, all measured up to be extremely close to the same bore on the dial gauge, going to get a measurement when i bring my 4" mic. to the shop tomorrow.
Ready to come out
Mike hard at work... well play? haha. Cant say thanks enough for all the work he put in to help me out!
Cylinder #2
#4 (cylinder that had pushrods break)
#6
#8
#7
#5
#3
#1
Postmaster
Joined: Jan 2007
Posts: 3,418
Likes: 1
From: Circle Pines
Mike and Mike,
Sorry I didn't make it out. A close family friend came into town this am that we haven't seen in a while. Not like I would have been much help anyways. Let me know when you are putting it all back together and I will come watch and do what I can. Sorry to see the destruction!!!!!!
Sorry I didn't make it out. A close family friend came into town this am that we haven't seen in a while. Not like I would have been much help anyways. Let me know when you are putting it all back together and I will come watch and do what I can. Sorry to see the destruction!!!!!!
Thread Starter
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Senior User
Joined: May 2009
Posts: 110
Likes: 0
From: Osceola, WI
No problem Tom! We will definitely have to get you out so you can see the process going back together. The destruction is bad... but I'm just thankful it didnt turn ugly.
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Lead Driver
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From: Hampstead, NC
I was really suprised at the amout of damage to 6 of the 8 pistons.
All but 1 rod bearing looked really good for 225K+.
There were also no major score marks in the cylinders, even #3 that had half of the rings gone and the majority of the land between the first and second rings missing too.
What I would like to know is, what could have caused the damage to the pistons, and why only on 6 of them? #5 and #7 have no marks on them, only a crack in each of them.
All but 1 rod bearing looked really good for 225K+.
There were also no major score marks in the cylinders, even #3 that had half of the rings gone and the majority of the land between the first and second rings missing too.
What I would like to know is, what could have caused the damage to the pistons, and why only on 6 of them? #5 and #7 have no marks on them, only a crack in each of them.
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Senior User
Joined: May 2009
Posts: 110
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From: Osceola, WI
I wish I knew!
And no chunks on the piston.. its just that beat up!
I'll grab a few pics of the heads today, most of them are good the two worse cylinders have a few marks.. but i'm sure the valves are f'ed.
My theory... Debris entered somehow. Either a long time ago when the previous owner put the turbo on, or when i was messing with injectors and took the drivers side charge tube off. Find that hard to believe since i made sure nothing was stuck in the charge tube and looked in each boot before i put it in.
So since something entered it destroyed most pistons... and on the bad ones the debris stuck in the valve seat holding it slightly open enough to hit the piston.
Anyone have piston clearance specs? Dont have a manual yet...
Cargo Master
Joined: Mar 2006
Posts: 2,502
Likes: 2
From: Bend Oregon
do you think a combination of weak valve springs and high boost numbers could have led to the piston/valve contact?
The rest of the damage looks like FOD to me. The only thing I have seen similar was on an old 6.2L Gm that a guy broke the glow plugs tips off in. Now that i think about it thats exactally what it looks like. Maybe the PQ used autolight GP's then when he changed them just broke off the swollen tips.
The rest of the damage looks like FOD to me. The only thing I have seen similar was on an old 6.2L Gm that a guy broke the glow plugs tips off in. Now that i think about it thats exactally what it looks like. Maybe the PQ used autolight GP's then when he changed them just broke off the swollen tips.