WHY IT BROKE! 4.8L LS LIFTER FIX!

LS LIFTER PROBLEMS? What caused the failure? Junkyard Turbo LS-We Got Lucky! Our 4.8L turbo test mule was headed for trouble. While replacing the worn-out lifter trays, we noticed damaged cam lobes and lifters. This happened once before, with the Compound Turbo test. What was causing the damage to the cam and lifters and how could we fix it?

[kswis]

I like watching someone that knows so much about GM motors tear into them, even as basic as it seems to you or I, there's someone out there who's having similar problems, but may seem like relocating continents to them. Until they watch Rich make it look as simple as taking the next breath of air. Good job man, keep em coming n I'll love to keep watching em

[necrofool]

Makes me happy that I replaced the lifter trays when I cam swapped my junkyard 5.3l

[robinator]

Always good to find the cause of a failure. Good lesson for all of us...thanks

[drakeolson]

I am just finishing my LS 6.0 turbo build and was ready to put my motor in next week. I am ordering new lifter trays before I button this thing up. Thank you for the heads up!!!!

[BEANS-O-MATICtransmissions]

I think that was a good find and most likely the contributing factor to high mileage failures like that.

[brentspence]

Sloppy stage 2 versus the world cam test! Can't wait

[runescapersonutube]

Yup, definitely what caused the wear in the cam and lifter, switching to bar linked lifters would solve the issue compared to plastic litter trays that wear out and can bend with all the heat cycles

[thatgreenrcsb]

As cheap as these trays are, anytime I have the heads off, I swap them out.
Great find Richard!!

[sespeedshop]

Hi Richard. I’ve just got to say, I absolutely love what your doing on this channel. I’ve been absorbing as much LS knowledge as I possibly can lately. I’m building a twin turbo 6.0 engine for my AWD LS swapped 1963 falcon build. I feel like you have been guiding me along the way! Just wanted to give you a big shoutout!! Great stuff my friend!

[dragbikedemon]

And that's cheap insurance! Thanks again for solid tech Richard!

[teamgmotorsports]

Soooo glad you did this video and pointed that out! This will help save countless motors!

[xravenhairsexgod]

What I love about your video is HOW you assembled the motor with finesse and explained WHY certain parts fail. These exciting motors will be much more appreciated content for step by step DIY engine builds and take out the fear of the unknown. Do a LS7 build next ! Thanks 🔧😼🔧

[charlesfear]

As always a plethora of useful knowledge! Richard it's a pleasure watching you in your element

[henrysordia]

That is exactly what is happening. I have had the same issue in the past. The lifter is turning inside the lifter tray. The tray is getting old and when it gets hot it gets soft and allows the lifter to turn off center on the lobe. My opinion is a link bar lifter would be the best choice to avoid this in a high performance engine.

[smithjo]

Your instructions here are PRICELESS!!!

[bryanphipps]

Richard, I have a 2003 half ton silverado I bought new, 4x4 ext cab with the venerable LR4. Back in 2015 I put a trick turbo log style turbo kit on with a 74/76 precision turbo, 39mm precision gate and a 50mm blow off valve. The engine is bone stock other than fueling and a tune by a local hot rod shop. The engine had 109k miles on it when I did the build, it currently has 158k. I never gapped the rings, any head studs or head gaskets. Everything is original, except recently I finally replaced the intake gaskets. Now mind you I only run 10lbs on waste gate spring, but it has been a blast and I tow a small camper with it occasionally.
Great videos by the way!

[LTXwooshie]

I just had this exact same failure. Thankfully I was already building a fresh motor. I'll be rebuilding the motor in it. I'll definitely be examining the lifter trays.

[elmerwilliamson]

Got a 4.8 liter in my 2000 GMC Sierra. I’ve had it over 20 years, best engine I’ve ever had! 180k trouble free miles. Would like to see a pro charger added to test engine.

[HANKTHEDANKEST]

I sure do like an LR4--small but mighty. Thanks for the informative vid--this feels like something that doesn't get talked about enough, and it's a pretty simple fix. If I ever have the heads off of mine I'll be sure to replace the trays!

[yinzer__]

My old machine shop guy always said plastic is for radio knobs. I'm glad I put new lifter trays in my 408 build.