Today at Ugly Truck, we're tearing down the 4.8L engine we took out of Emily's 1970 Chevy C10. (If you missed that video, check it out here!    • LS SWAPPED 1970 Chevy C10 - 5.3L INST...  ) We bought this engine with about 240k miles for cheap, and threw it in the C10 just to get the LS swap done...knowing that it wouldn't last forever. It ran great, but used coolant from day one. Fast forward a couple years and many miles later, and the engine has a knock and a ton of sludge in the oil pan. We freshened up a 5.3 and swapped it in, and the 70 Chevy is back on the road. But our curiosity got the best of us, and we had to know exactly where the antifreeze was leaking, and how much damage was caused.

As soon as we removed the first valve cover, we had the answer to our first question. The coolant was definitely leaking into the oil, and not out the tailpipe. We found a little wear on the rockers and push rods, but overall the engine actually held up pretty well considering the mileage and condition of the oil. Even the bearings on the crankshaft looked good. It looks like the camshaft and cam bearings took the brunt of the damage, and after seeing the oil pickup tube and the sludge in the oil pan, it's a miracle it ran as well as it did. These 4.8L's are tough little engines!

Shoutout to Eric from @I_Do_Cars for the crankshaft pulley remover trick! The rods that come with the puller are notorious for bending, but he pointed out an LS pushrod works just fine. And the good new is, now we have 16 new ones!

Click here to see us prep the 5.3 that replaced this engine!    • FRESHENING UP JUNKYARD 5.3 FOR LS SWA...  

For more LS SWAP content, check out this playlist!    • 1985 Chevy C10 - LS SWAP - UGLY TRUCK...  

We've gotten some comments about how we heat our shop and how our waste oil heater works, so we take a minute to explain the method behind the madness. If you didn't get the hint from the video...DON'T BUILD ONE. It's most definitely not a safe way to heat a shop, but it works for us.

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7915 E. Division St.
Strafford, MO 65757

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