5.3L TSP Cam
05-01-2018, 06:23 PM
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5.3L TSP Cam My wife’s 07 Tahoe (5.3L LMG motor, 125,xxx miles) was squealing from a valve cover. I suspect it’s a lifter/cam issue due to the AFM. The intake has a small screen built in for the oil and I think it’s clogged and starved the lifter for oil. Roller freed up (not squealing now, but clicking) and the cam flat spotted the roller. So my plan is to do the AFM/DOD delete, chromoly push rods, maybe upgrade the valve springs to LS6 springs, and install a 212/216 stage 2 low lift cam, all from Texas Speed and Performance (20 min drive to their building. Jealous? LOL) The reason for the cam is because we pull a 25 foot travel trailer and live in the hill country. The Tahoe hates the hills when pulling it. Should I be worried about durability with that mild of a cam? My boss (who raced dirt tracks when he was younger) said I’ll blow the motor unless I replace all the pistons, rings, crank, bearings etc. I think he’s crazy. I told him I’m not racing it at 8k RPM around a dirt track. He said put all stock parts back in it. Why? So the AFM does this again and I have to pull it apart when it does it again? I don’t think that mild of a cam is really going to cause any issues. It’s been well taken care of and we have never had any issues with it. I’m just looking to gain a little more torque and HP to help it pull better. Everything is BONE STOCK. Won’t be putting headers on it because it’s my wife’s. Will consider a mild exhaust (Magnaflow, Borla?) and better air intake system in the future so it breaths better. Should I be worried? Or am I crazy? You guys are the LS experts. I’m not a motor builder but I’ve always fixed my own vehicles. So, I’m turning to you.
05-01-2018, 07:08 PM
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Take your heads with you to TSP and get them to rework them while they are off. Twin turbo guys buy junk yard 4.8/5.3's and make over 700 hp without changing anything..
05-01-2018, 07:15 PM
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05-02-2018, 01:06 PM
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That was just a suggestion about the heads, ask to visit their machine shop, it's worth the time. I didn't see any thing about budget constraints in the initial post. I think you will need new lifters also.
05-02-2018, 02:38 PM
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