Cat c15 IVA

[davidjrawls]

Needing the orings for the pistons on the Iva housings for an c15 acert Iva housing. Goes in the groves where I’m pointing in the picture. Cat says I have to buy the whole housings. Hopping someone has ran into this already.

[Btech]

Cat decided all the IVA housings are non-serviceable other than changing the solenoids, so no official parts are available for what you want.
Your best bet would be to go to a hydraulic service/repair shop and see if they would have any orings that would be the right size, I imagine they are a viton oring with the pressures they could see on the piston.

[Rawze]

Hopefully this is not during one of those attempts to modify the IVA valve operations... If you value your head gasket and engine that is.

Many a moron has modified them to be permanently closed during a de-mandate, only to find out the hard way that it is NOT a good idea ... unless ....

They can be modified to be permanently closed and run the engine at 19:1 compression ratio full time, .. but that also requires the boost to be turned down to 33-34 psi max too. Allowing the boost to go above this = excessive dynamic compression ratio and engine/head/gasket damage.

[davidjrawls]

Just trying to get them all back in working factory order. Without having to spend 4k on housings just because I need rings.

[trucklogger2]

(03-20-2025 )davidjrawls Wrote:  Just trying to get them all back in working factory order. Without having to spend 4k on housings just because I need rings.

Maybe try Adept Ape on YouTube (Josh) he’s a long time cat mech very informative. He’s talked Aa lot about those.