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HX40II Turbo Install

One fine point I don't think I have seen anyone make is. Before you fire up the engine with a new or R&R turbo you need to (while the GP's or injectors are out is best) turn over the engine till the air is purged out of the turbos oil feed line and you have flow out of the drain. Spinning a turbo without that oil film it runs on will severely shorten the bearing life.
 
L98TPI said:
One fine point I don't think I have seen anyone make is. Before you fire up the engine with a new or R&R turbo you need to (while the GP's or injectors are out is best) turn over the engine till the air is purged out of the turbos oil feed line and you have flow out of the drain. Spinning a turbo without that oil film it runs on will severely shorten the bearing life.
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I also put a funnel on the turbo feed and let oil run down thru before I cranked it
006-2.jpg
 
great white said:
Got a reference to back that statement up? Everyone I've talked to has said navistar was the original contractor from the get go....
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They were/are. In one of the long posts here about the Optimiser and P400 one of the inside GEP sources said they tried to source Chinese castings but while they could made nice castings they had QA issues so they didn't go with them. And no I am not going to hunt down the posting.

Bet ya dollars to donuts that attempt is where the Chinese castings we see now came from. They had the GEP prototypes so run with it. It happened to GE when I worked there years ago. We let them look at a design and then did not for what ever reason contract with them to build it. About a year later some one was selling a product based on that same design.
 
L98TPI said:
They were/are. In one of the long posts here about the Optimiser and P400 one of the inside GEP sources said they tried to source Chinese castings but while they could made nice castings they had QA issues so they didn't go with them. And no I am not going to hunt down the posting.

Bet ya dollars to donuts that attempt is where the Chinese castings we see now came from. They had the GEP prototypes so run with it. It happened to GE when I worked there years ago. We let them look at a design and then did not for what ever reason contract with them to build it. About a year later some one was selling a product based on that same design.
Click to expand...
They can reverse engineer anything, then build it way cheaper than we can
http://www.chinacartimes.com/2006/11/13/the-chinese-humvee-copy-eastwind-eq2050-dongfeng-eq2050/
 
L98TPI said:
They were/are. In one of the long posts here about the Optimiser and P400 one of the inside GEP sources said they tried to source Chinese castings but while they could made nice castings they had QA issues so they didn't go with them. And no I am not going to hunt down the posting.

Bet ya dollars to donuts that attempt is where the Chinese castings we see now came from. They had the GEP prototypes so run with it. It happened to GE when I worked there years ago. We let them look at a design and then did not for what ever reason contract with them to build it. About a year later some one was selling a product based on that same design.
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So, someone said it on a web forum so it's true?

:rolleyes5:

Highly unlikely the HMMWV (GEP/AMG) was going to use a Chinese cast block given the politically motivated content restrictions on gov't contracts/acquisitions....

More likely the "Chinese blocks" are just a re-engineered rip off. That's an even more credible scenario with Chinese cast blocks popping up with the navistar diamonds in them....
 
Political motivation is a good point. Maybe sell the offshore blocks to GM and the Navastar ones to Uncle Sam :)
I do recall Missy saying she had seen one of the chinese blocks and as far as finish and appearance was it looked nice. For as much as an eyeballing means. I would like to put the mikes and gauges to one.
I think I would use a china block if it measured out ok. But you can bet the inside cast surfaces are all going to get a coat of Glyptal. Something else we used at GE back in the day.
 
I would also be just as curious to know the metallurgy, percentages / composition... who's to say that it's not cast any better then the original failure prone GM castings... The genuine GEP blocks are cast with better materials and are denser.
 
I can't say about what is in the metal, but I can tell you that the GEP heads I have and are porting on are a harder metal than the older GM heads are, it takes more work to port them just due to the hardness of the metal, and the funny thing is that the runners are a little smaller in the GEP heads, meaning there is more to take out to get the same size runner in to the GEP head.

Chris
 
sctrailrider said:
I can't say about what is in the metal, but I can tell you that the GEP heads I have and are porting on are a harder metal than the older GM heads are, it takes more work to port them just due to the hardness of the metal, and the funny thing is that the runners are a little smaller in the GEP heads, meaning there is more to take out to get the same size runner in to the GEP head.

Chris
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Good observation. That would stand to reason considering the heads and blocks are highly likely to be poured from the same pot feeding tandem casting lines. And "according to rumors one might find on the internet" :) the metallurgy was improved with more nickle and such.
I wonder how much it costs to have a iron sample
 
L98TPI said:
Political motivation is a good point. Maybe sell the offshore blocks to GM and the Navastar ones to Uncle Sam...
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Not to be confrontational but nope.

I've got a GM sourced GEP Optimizer 6500 in my truck. It's an Optimizer 6500, assembled in Franklin, Navistar cast.

Guaranteed.

;)

sctrailrider said:
I can't say about what is in the metal, but I can tell you that the GEP heads I have and are porting on are a harder metal than the older GM heads are, it takes more work to port them just due to the hardness of the metal, and the funny thing is that the runners are a little smaller in the GEP heads, meaning there is more to take out to get the same size runner in to the GEP head.

Chris
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The GEP heads are redesigned internally. Passages were moved and places were "thickened" in order to deal with the cracking valve lands and heat issues. No idea if they moved or "shrunk" the intakes. Composition is grey iron and Chromium (and more stuff that no one is telling).

Just because the runners look or mic smaller doesn't mean opening them up will give you gains. Or that you won't strike water......tread with caution would be my advice.

Anyways, this is enough of a hijack so.......ciao!
 
great white said:
Not to be confrontational but nope. I've got a GM sourced GEP Optimizer 6500 in my truck. It's an Optimizer 6500, Navistar cast. Guaranteed. ;)
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The smiley face :) in that comment was meant to indicate I was joking. That was never meant to indicate GEP ever used any casting from any place other than navistar. :rolleyes5:

There were comments repeated, supposedly from insiders, real or not, that at some point GEP considered other sources maybe even china. :skep:
That last emoticon was to indicate, even I am skeptical.
Explaining your emoticons kinda kills the fun/point of using them. :(
 
L98TPI said:
The smiley face :) in that comment was meant to indicate I was joking. That was never meant to indicate GEP ever used any casting from any place other than navistar. :rolleyes5:

There were comments repeated, supposedly from insiders, real or not, that at some point GEP considered other sources maybe even china. :skep:
That last emoticon was to indicate, even I am skeptical.
Explaining your emoticons kinda kills the fun/point of using them. :(
Click to expand...

Sure does, kinda like missing the "wink" smiley?

:hihi:
 
Chevy3500 said:
Im Going to order the hx40wii on monday, i just wanted to make sure before i buy it that no one has had anyproblems with this turbo or had a problem with their engine after they installed the turbo, i plan on setting the waste gate at 15 psi do you think my engine should handle it fine, it has like 250,000 miles, oil is black, and i run synthetic oil and change it every 3000 miles.
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Someone over on the place busted their crankshaft after going with one. I forget if it is this specific model. I have busted several engines with the restrictive factory turbo. So just keep in mind you have 2.5 times the golden 100K on your engine. 2 of the 3 total engine failures I had did not take out the turbo. The coolant in oil from the pic I have did wipe the turbo bearings and gave it a slug of debris in the exhaust and intake.

Used low mile 6.2 engines are $950 plus shipping with a 90 day warranty. So even if it does blow up: engines are cheap. Hopefully it doesn't take the turbo with it...

IMO getting the factory turbo off helps engine life. High boost on high mile TTY bolts and heads gaskets I wouldn't try myself. But I use ARP studs and forget about those issues.
 
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