oem cat or ipd parts for a 4mg cat rebuild?

I went the IPD way a year and 100k miles a go, 3406E, did it my self, I'm a O/O not a mechanic.

 

No first hand experience but I've asked this same question on other forums and it seems that IPD makes a decent kit. I will likely be going that way on my hobby truck unless my company discount on Cat parts is comparable to IPD.

@superhauler @SmokinCAT

 

Fp Diesel by Federal Mogul is what I used. Brand new Mahle Pistons. If you are not familiar with Mahle, they make most of the OEM pistons.

Now that being said, I cannot tell you longevity or anything as I am rebuilding mine again after 4 months cause the mechanic didn't cut the counter bores with a 10 thou dip on the flange. I can tell you they still look brand new but after only 4 to 6 months.... I would expect that.

 

I have used PAI, IPD in several. I can't stress enough how important liner protrusion is. Head bolt torque, holes being clean and properly lubed is just as important. CAT parts are not what they use to be for sure. I have heard of missing or broke rings on the pistons. Since they come loaded most don't check. I will say I have never found anything like that.

Quality parts and attention to detail on installation is key for an overhaul to last.

 

If your doing a kit I believe there’s a big difference in the warranty between the 2 companies.

Ipd is 12 months only, Cat will sell you up to 4 years I believe.

 

IPD warranty is 2 year unlimited mileage for on-highway engines.