TxHL850

I have a 2011 Silverado with a 5.3 that’s bone stock with 170,xxx miles on the clock. Truck has been well taken care of and still runs like a champ. Looking into pulling the trigger on a KB turbo or trick turbo kit for it. Is it worth doing on such a high mileage motor or would it be better to keep it how it is and let its live out it’s days?

FFDP

iTrader: (2)

Go for it, the bottom end won't really care.

The stock AFM/DoD valve train may not like it as much.

arthursc2

iTrader: (5)

Pfft I have just under 190k on my 5.3. She's been boosted 2x now, about to be a 3rd at 12-14psi

the older they are, the better they take boost IMO. Have a good PCV system and let her eat

dantheman1540

The 140k mile 4.8 I just pulled out had been boosted for 25k at 16PSI. I sorta regret pulling it out because it made awesome oil pressure and upon tearing it apart the thing was minty clean still! Good fuel, good oil and a proper tune are the key.

I'd slap a little turbo cam and good valve train in that 5.3 and let it eat!

ertoys

My 2007 has 210,000 on the clock, I am currently waiting on my turbo kit...

zz454Chevelle67

My 2001 has 270,000 on it, 150,000 of those with a supercharger. I`m about to go turbo, I say go for it.

NoorJ

are you guys doing any other valvetrain work besides cam/springs to these older motors? I had a 7875 turbo/5.3/4l80 RCSB with about 150k on it and when I did cam/springs in it, it seemed like the valve stem seals instantly started to leak oil down into the chamber when I put the cam in. In retrospect I should have done stem seals at the same time but hadn't really heard of anyone having that issue before.

arthursc2

iTrader: (5)

I did stem seals when I did springs. Its kinda the same logic of doing the rear main when doing a clutch.

Whether its leaking or not, its better to do it