The tear down

[Diesel power]

Tore the top end off today, found more than i expeced in the valve train

area, and all but a few push rods were bent. lifters were scarred up some, rockers wore into the bridges some, and the valve seals all were unthreaded at the top of the valve stem.....

pistons were perfect except the carbon was darker than it should have been, but i found out why, we were ingesting a lot of oil into the intake due to the turbo's leaking oil, and the intake valve seals being completely un threaded.

Bore looked good to, spray pattern was in the bowl nicely, not contact with the valves or head at all.


Short block details later this week..

 

[x MadMAX DIESEL]

Look forward to hearing more. How many passes were on this?

 

[Diesel power]

Look forward to hearing more. How many passes were on this?

21 Passes at the track and about 3 hours of run time/testing in the shop.

 

[GeorgiaDuramax]

Interested in hearing more

 

[juddski88]

What were the specifics on the parts used? Assuming they are all aftermarket...

 

[sweetdiesel]

jesus wade that sux!im sorry to hear that

i bet it made the cash register noise when taking off the valve covers

 

[Diesel power]

jesus wade that sux!im sorry to hear that

i bet it made the cash register noise when taking off the valve covers

Yea, when i saw that the push rods were bent i took a deep breath, and expected the worst, but upon head dissasembly everything was fine,as far as the piston to valve contact went, because thats what i expected to see, beings the push rods were bent up and all.

Looks like the push rods just plain failed...no real reason besides maybe the RPM we are running....That would also explain why the rocker to bridge area was worn too.

I'll get some stronger push rods

 

[x MadMAX DIESEL]

i remember Pat posted awhile back that mostly all of the bent push rods he has seen have not hurt anything else in the valvetrain. Rather they don't bend obviously, but its like a having a burstplate for a blower... Kinda nice in a way

 

[Diesel power]

i remember Pat posted awhile back that mostly all of the bent push rods he has seen have not hurt anything else in the valvetrain. Rather they don't bend obviously, but its like a having a burstplate for a blower... Kinda nice in a way

True, but if they bend that easy there flexin all over causeing loss of power, that i dont like.

 

[SmokeShow]

They weren't stock push rods were they? What brand were they if different?

Why would the valve seals be unthreading???

 

[Diesel power]

They weren't stock push rods were they? What brand were they if different?

Why would the valve seals be unthreading???

Yep stock push rods...


Valve seals were unthreading because of the dual springs i use. the inner spring under load is hitting the seal some while it rotates around the stem.

 

[Akdiesel]

I want to see how those aluminum rods held up

 

[ChevyDieselLLY]

I want to see how those aluminum rods held up

x2

 

[Diesel power]

I want to see how those aluminum rods held up

Well it still was running when it came in the shop......so i would imagine they held up fine!!

i'll have hard data, within the next few days.

 

[Akdiesel]

Well it still was running when it came in the shop......so i would imagine they held up fine!!

i'll have hard data, within the next few days.

Thats what I'm talking. Pictures (which I've never seen) and if any are bent to what degree are they bent. Cause my motor in something that weighs 2800lbs would be fairly fast too

 

[IOWA LLY]

Thats what I'm talking. Pictures (which I've never seen) and if any are bent to what degree are they bent. Cause my motor in something that weighs 2800lbs would be fairly fast too

Chances are very slim you will see any visible damage to the aluminum rods. But that doesn't neccesarily mean they are re-usable...

 

[Akdiesel]

True I remember even with stock rods watching Trents build you couldn't really visibly see the damage but it sure was done.

 

[Diesel power]

Thats what I'm talking. Pictures (which I've never seen) and if any are bent to what degree are they bent. Cause my motor in something that weighs 2800lbs would be fairly fast too

So you think....:rofl:

 

[Akdiesel]

Do the math...at 2800lbs and 550hp you'd be in the 9s. Now I'm not saying it's that easy I understand it's a daunting task I'm just saying with the weight advantage it doesn't take near as much to get those times down.

 

[Diesel power]

Do the math...at 2800lbs and 550hp you'd be in the 9s. Now I'm not saying it's that easy I understand it's a daunting task I'm just saying with the weight advantage it doesn't take near as much to get those times down.

The math is based on a perfect world, but do we live in a perfect world? no.

When you have to accelerate a engine in a heavy vehicle it's no problem to keep the engine loaded, do it in a light weight car, the world as you know it changes,drastically.

in other words to look at the calculator is missleading, in the real world it takes more power to accelerate faster.

look at Pro stock class engines only dyno at 1600-1700 hp, yet the track times show about 1900-2000hp, things change alot when your accelerating that fast...