so i the guy at the machine shop says my cylinders will need to be bored and will need to get new pistons. he said he could order them for me but id like to do a little shopping first and of course this will be my first stop. anybody have any experiance with aftermarket pistons? are there performance pistons? thanks!

 

mahle pistons if you really want. no worries about melting them as soon as the aluminum ones would.

 

x2, if you can afford them. Monotherm all the way Baby!

 

How much more heat will they take?

 

Actually, I can't remember. I'm not even going to guess, but I do know it's considerably higher than the regular aluminum ones. And we all know how much abuse they can take and live to fight another day.

 

So you would be able to sustain higher egt's ? Or would it melt something else

 

Technically yes. Practically... I don't have the money to find out! They can withstand higher temps, and steel also expands less than aluminum, so I'd hazard a guess that they'd last longer from that alone.
I guess the exhaust manifold wouldn't be too happy, or the valves... turbine maybe? Kinda depends on how much heat for how long a period. You know what they say, everything in moderation!

 

so where is a good place to find these monotherm pistons? i cant find a place to buy, just read about them. they look awesome though! im just not computer savey ya know..

 

I'm probably wrong but I thought Haisley had these? Well at least I know that they carry a few set of Pistons there. Did you melt a piston in your truck or just asking?

 

i have to get my block bored.. i cracked my original block and the $200 replacement has been sitting for years. it has some rust lips on the cylinder walls that are pretty deep.

 

Too busy listening to Slayer? There's a guy on here whose real name is Kerry King!


Sorry, I digress. Here's a link to find a local store in your neighborhood that supplies Mahle pistons, rings etc. http://www.mahle-aftermarket.com/

 

a set of monotherm steel pistons costs about 3k!! sont have that king of $$. maybe ill look in to their cast aluminum pistons, the cost closer to a hundred a piece.. anybody know about these ones?

 

Like I said, great of you can afford them! I never did price them up, but now I know...

 

wow, all thumbs i was on that last post...

 

You can get replacement pistons from Mahle, too. They have lots of pistons for the 5.9. Now you are gonna have to figure out wich ones you want. I'd use the non/IC version.

I don't even know if you can just go buy the monotherms, I think there is a waiting period.

I am pretty sure the valves are next in line of failure after the pistons.

If you read there ads, it says something like they "virtually eliminate piston failure". So for $3K they still won't guarantee it.