Turbos going out in cat c15

Only way to check is to pull intake and exhaust and visually check for damage and play. The acerts are bad for an exhaust sleeve coming apart and taking both turbos out. They are also bad for broken actuator/rocker bolts. Squeeling could be a bad air leak in intake piping or charge air cooler as well as turbos. A bad leak can cause the symptoms you are describing. I would check that first. It's a royal pain to remove all the piping to check the turbos.

 

I believe there are no upgrades for the "twins"......

 

3000-4000 for the set from cat. I am unsure on aftermarket. Plan on broken mounting bolts and new sleeves when you change them. No special tools needed just lots of patience. Need to do a pressure test on intake system first. If creative you can do test with plastic tubs, clamps, and a gauge with air port. Load 30psi and spray with soapy water. Squeeling turbos you should have an easy leak to find. Unless you are loaded the twins can keep up boost, but under load sounds like you are losing boost. They will scream like a raped ape when a boot is blown or a blown manifold. You may have bad turbo(s), but I would check air system first, it will only cost you time. Good luck.

 

i purchased after market high pressure turbo here in cali about a year ago at a cost of 950$ put it on my self and im very satistfy. you just need basic mechanic hands, and some basic tools.
but what you do need is to be a round any one of them dealers who serving cat engine incase you you`ll new v clamps.

 

When pricing out parts, try pricing through your Peterbilt dealer. I have frequently gotten Cat parts much cheaper from them than as a walk-in at Cat.

 

Run an oil test also, see what you find

 

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