6.7 Cummins block made in China?

This isnt a bash FCA/Ram/Cummins thread. In fact, I wish Ford sometimes used the 5.9 Cummins over the 6.0/6.4 PS but I digress.

I was doing some research on the 6.7 Power Stroke and found that the CG block is cast in Brazil, and the engine is assembled in Mexico before being sent to Kentucky for final assembly into the Super Duty.

Being curious to see where the main competition is made (Cummins 6.7) I was pleasantly surprised to hear that Cummins assembles their engines in Indiana. It was difficult at best to find where the block was cast.

Come to find out, it looks like the block is actually cast in CHINA. Is this true? Can anyone confirm this? If its true, I dont think I could buy one to be honest. That would be a big let down.

http://www.chinamarineparts.com/ShowProducts/?34631-1.html

With the right engineers and people on the ground, you can get very high quality castings and forgings out of china.

Pretty sure it is cast in China in one of their joint venture facilities, that said they do final engine machining and assembly in Indiana. I know the 53 blocks that liked to crack were cast in Brazil IIRC. To be honest, I'm not worried about overseas castings as long as the company behind them is reputable and known to have strict qc tolerances such as Cummins, or Ford or GM for that matter.

I love my 5.9, the only thing I would trade it for is maybe doing a 6.7 or what is really intriguing is a 6.4 hybrid (6.7 block, stock bore, 5.9 crank and longer rod). Huge power, better breathing, better rod/stroke ratio and more displacement.

Might be hard to get those castings currently with the Corona virus

So something that may have changed, Cummins recently switched to a CGI block for Ram applications.

SID297 said:

So something that may have changed, Cummins recently switched to a CGI block for Ram applications.

Click to expand...

I think you’re right, as I had read rumors since at least ‘17 but I saw an article when you said that and it stated they were casting the new sintered CGI blocks in Mexico.

SID297 said:

So something that may have changed, Cummins recently switched to a CGI block for Ram applications.

Click to expand...

Junior00 said:

I think you’re right, as I had read rumors since at least ‘17 but I saw an article when you said that and it stated they were casting the new sintered CGI blocks in Mexico.

Click to expand...

Are these CGI blocks used for the 1000 ft lb version or the all the 6.7s?

598 said:

With the right engineers and people on the ground, you can get very high quality castings and forgings out of china.

Click to expand...

Can confirm. My engineers do some good work with our plants in China. Competing products? Not so much.

lexustech48 said:

Are these CGI blocks used for the 1000 ft lb version or the all the 6.7s?

Click to expand...

Pretty sure that’s all versions, I don’t think there is any physical difference between the 2500 & 3500 other than programming from the factory. I think they just have the 1 tons the bump to try and get folks to go for them. Honestly, I don’t think there was anything different between them except for spring rates, unless you need a drw which makes the 1 ton your only option.

lexustech48 said:

Are these CGI blocks used for the 1000 ft lb version or the all the 6.7s?

Click to expand...

I believe the marine, and possibly OR, versions are still using the old block.

SID297 said:

I believe the marine, and possibly OR, versions are still using the old block.

Click to expand...

I don’t think they were swapping any of the MDT, mining, bus, etc. over to cgi. I think the partnership with Ram and competition with Ford/GM necessitated the use in the 6.7 for appearance. Thats the thing about the in-line 6, it can handle big power better than the V offerings by design. I really don’t think they needed to change at all except to say me too.

The 6.7 was stronger than the 5.9 because of the Siamese bores, and the 5.9s would easily handle 500rwhp/1200rwtq for years with the biggest issue being extreme heat dropping valve seats.

Ford and Dodge have used Brazil and Mexico for casting iron diesel blocks in the past. Not sure where that happens today, but China wouldnt surprise me.

TUPY in Brazil cast the notorious junk "53" cummins blocks in the 24v trucks (99-02) that liked to split along the coolant jackets.

well this would explain a little bit. My uncle has a '16 6.4 cummins and the main seal wouldn't stop leaking. after the 4th trip to the dealer they finally replaced the motor. A week later it started leaking again. Chinese castings ftw!!!

Junior00 said:

I don’t think they were swapping any of the MDT, mining, bus, etc. over to cgi. I think the partnership with Ram and competition with Ford/GM necessitated the use in the 6.7 for appearance. Thats the thing about the in-line 6, it can handle big power better than the V offerings by design. I really don’t think they needed to change at all except to say me too.

The 6.7 was stronger than the 5.9 because of the Siamese bores, and the 5.9s would easily handle 500rwhp/1200rwtq for years with the biggest issue being extreme heat dropping valve seats.

Click to expand...

This biggest reason Cummins switched the block was likely due to NVH. The new block uses scissor cut gears and hydraulic roller lifters. It also uses the CP4 pump for better emissions control. The 6.7 Cummins makes 550HP and 1250TQ in marine applications on the old block.

gimmie11s said:

Ford and Dodge have used Brazil and Mexico for casting iron diesel blocks in the past. Not sure where that happens today, but China wouldnt surprise me.

TUPY in Brazil cast the notorious junk "53" cummins blocks in the 24v trucks (99-02) that liked to split along the coolant jackets.

Click to expand...

Tupy makes the 6.7 Powerstroke block, and I'm pretty sure they do the 2.7L EcoBoost one too.

Brazil sucks for just about everything. Limited utilities and infrastructure , poor work/quality culture, corruption, crime and the absence of high skilled work force are all major detractors.

I used to get heavy truck frame rails out of there, robotic welders where junked because they never received maintenance, tooling was beat to **** with unsafe/incompetent repairs, gauges never certified causing a horrific tolerance drift. Absolute night mare work transfer.

"Cheap Labor" isn't the only reason people go to China.

gimmie11s said:

Ford and Dodge have used Brazil and Mexico for casting iron diesel blocks in the past. Not sure where that happens today, but China wouldnt surprise me.

TUPY in Brazil cast the notorious junk "53" cummins blocks in the 24v trucks (99-02) that liked to split along the coolant jackets.

Click to expand...

gimmie11s said:

Ford and Dodge have used Brazil and Mexico for casting iron diesel blocks in the past. Not sure where that happens today, but China wouldnt surprise me.

TUPY in Brazil cast the notorious junk "53" cummins blocks in the 24v trucks (99-02) that liked to split along the coolant jackets.

Click to expand...

Was that all of the 5.9 Cummins production 99-02 or a just specific batches? The 5.9 was supposed to be the ultimate light duty diesel wasnt it?

Wasn't all but a significant portion, something like 80-100k blocks though I think most were used in 99-00 models. There were Mexican cast blocks as well that weren't affected.

One thing Travis was talking about is the use of the CP4 pump. Personally, I hate them with a passion. They flow less so they run at twice the speed, which is why LSD ate them up faster due to less lubricity in the fuels. They don't do nearly as well with contaminates either, though none were meant to handle them, but it (CP4.2) is more susceptible. I'd rather they improved upon the CP3 design or used a k16. My truck turned up makes right at 600rwhp on a stock CP3 though I have no emissions to deal with thankfully.

lexustech48 said:

Was that all of the 5.9 Cummins production 99-02 or a just specific batches? The 5.9 was supposed to be the ultimate light duty diesel wasnt it?

Click to expand...

No, was not all. Not even close, luckily.

It certainly is the ultimate IMO.

I happen to have one that is a non-53 block and ADORE this truck.

If you can find a clean example of one, you must buy it.















Sent from my iPhone using the svtperformance.com mobile app

Damn 2nd Gens look great. I love the seats/interior for whatever reason. I hate the 3rd Gen.

To bad they've all turned to absolute shit piles unless you spend $20k

gimmie11s said:

No, was not all. Not even close, luckily.

It certainly is the ultimate IMO.

I happen to have one that is a non-53 block and ADORE this truck.

If you can find a clean example of one, you must buy it.


View attachment 1626780

View attachment 1626781

View attachment 1626782

View attachment 1626783

View attachment 1626784




Sent from my iPhone using the svtperformance.com mobile app

Click to expand...

I've considered buying a 2002. A note on the 53-block, most that were going to fail already have.