Whos running Mahle Pistons in their 12v?

dzlfarmboy

dzlfarmboy

Supporting Vendor
Looking into some piston options for a 12v motor, something with a larger bowl and drop compresion a lil. Curious where you got them from and ballpark $$

Thanks Brett
 
I run the larger bowl mahle pistons in my pulling truck. Compression is somewhere around 15:1.
Works pretty well, got them from Haisleys, ballpark $275 each or so, not sure what they are now.
 
The 12V Marine piston from Mahle is weak. Expect failures faster than a stock 12V Cummins piston from years 1995 and up.

If the HP is kept under 700 and cp's are held within reason they should be fine with limited use.
 
I will be running them, when my engine is running again. I got them from Scheid, but they had to be fly cut due to valve lift. I figured it was their cam, and they know how much to cut to suit that amount of lift.
 
Soup Nazi said:
The 12V Marine piston from Mahle is weak. Expect failures faster than a stock 12V Cummins piston from years 1995 and up.

If the HP is kept under 700 and cp's are held within reason they should be fine with limited use.
Click to expand...



You mean Mahle 155 degree bowl piston?


According to Smokem, those pistons are better than Cummins original marine pistons (reason:better the ring landing location).
 
Can somebody poset here 3 pictures (just for comparsion):

1. Mahle marine
2. Mahle 155
3.Cummins Marine
 
Just cause Mahle makes the OE cummins pistons, doesn't mean they sell the same piston. Cummins could have supplier agreements with Mahle that prohibits Mahle from selling the same piston, or perhaps pistons using the same alloy.
 
In my Cummins marine pistons side skirts are deflon coated.:rockwoot: , but I have not seen coatings in Mahle pistons
 
So whats the deal between those 3 pistons as far as differences in, bowl, ringland, material, size/compresion ratio.

Mahle 155
Mahle Marine
Cummins 370 Marine
 
zstroken said:
Just cause Mahle makes the OE cummins pistons, doesn't mean they sell the same piston. Cummins could have supplier agreements with Mahle that prohibits Mahle from selling the same piston, or perhaps pistons using the same alloy.
Click to expand...

You are correct.
 
AsTroSS said:
Can somebody poset here 3 pictures (just for comparsion):

1. Mahle marine
2. Mahle 155
3.Cummins Marine
Click to expand...


Cummins Marine 370
172-7211_IMG1.JPG

172-7210_IMG.JPG






Mahle 155
abfe_1.jpg

ac3e_1.jpg


I have no picture of Mahle Marine piston
 
The 370 marine that Mahle sells looks exactly like the Cummins 370 marine pistons. It has dual steel ring lands teflon skirts. The Mahle come loaded, rings already installed and wrist pins. I will get the part number up. I have compared the Cummins marine to the Mahle marine side-by-side and they look exactly the same. I just overhauled a Cummins N-14 and M-11 and the pistons are two piece articulated design (steel crown aluminum skirts). Inside the skirts it has Mahle cast inside. I called Mahle to see if I could go around Cummins they said there contract would not allow them but, the contract time was almost up and we would see after market kits for the M-11.
Cummins uses two suppliers for there pistons Mahle and a company called something like Kopin Schmidt(?) This is what the tech guy at Mahle has told me.
By the way GM uses the same two company's in there Duramax. Mahle was used in the LB7 and LLY engines and Kopin Schmidt in the LBZ. Guess which one has the cracking problem...
 
Voodoo Trucker said:
The 370 marine that Mahle sells looks exactly like the Cummins 370 marine pistons. It has dual steel ring lands teflon skirts. The Mahle come loaded, rings already installed and wrist pins. I will get the part number up. I have compared the Cummins marine to the Mahle marine side-by-side and they look exactly the same. I just overhauled a Cummins N-14 and M-11 and the pistons are two piece articulated design (steel crown aluminum skirts). Inside the skirts it has Mahle cast inside. I called Mahle to see if I could go around Cummins they said there contract would not allow them but, the contract time was almost up and we would see after market kits for the M-11.
Cummins uses two suppliers for there pistons Mahle and a company called something like Kopin Schmidt(?) This is what the tech guy at Mahle has told me.
By the way GM uses the same two company's in there Duramax. Mahle was used in the LB7 and LLY engines and Kopin Schmidt in the LBZ. Guess which one has the cracking problem...
Click to expand...
Do you have a part number for the mahle marine piston in .5mm over
 
The part # for the 1.0mm (.040) over sized pistons that I have is 286140WR-040. I think the part numbers for the .50mm (.20) is 286140WR-020. Standard pistons is 286140WR. The WR in the part number means they come with wrist pins and rings. If you drop the WR then its just the piston part number.
 
My guess is before too long we'll all get to see how durable these really are.

The Mahles' look exactally like the pistons in my motor and I will get to tear it down soon, the compression check I did last night was not to good.

Jim
 
I have no picture of Mahle Marine piston[/QUOTE]
I took some pictures of the Mahle marines I have and I tried to post them but, can't get it to work. If somebody wants to post them PM me with your email address.
 
Voodoo Trucker said:
I took some pictures of the Mahle marines I have and I tried to post them but, can't get it to work. If somebody wants to post them PM me with your email address.
Click to expand...
You have at least 3 ways to do it:
1. upload the picture CompD member galleries
2. post the picture like attachment
3. upload the picture somewhere internet (like Youtube or something similar) and link it over here
 
You must log in or register to reply here.
Back
Top