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Today we tear down the 5.3L L84 V8 Engine from a 2019 GMC Sierra that was in a pretty serious accident. Normally in wrecks like this, the engine survives with minimal damage but in this case, the engine was RUINED!
The engine comes from a truck bought at the Copart salvage auction that was intended to be resold but once the truck was dismantled, some major block damage was found and the engine found its way into my shop for a proper autopsy.
So what happened here? Did the engine fail during the wreck? Did the engine fail due to circumstances following the accident? Either way, the results were pretty wild as this type of failure while not rare, usually results in slightly less crazy damage.
My name is Eric and I own and run Importapart, a full service used auto parts business. Part of our model includes buying blown up and failed engines with the intent to teardown and salvage the good parts while recycling the rest. We do not rebuild engines, merely supply parts to people who do.
00:00 Intro
03:45 Removing the spark plugs and…. DRAINING THE OIL!? ERM, what?
05:31 Unbolting the intake manifold and lift it off the heads
06:06 A Peek into the intake ports. The ports and intake valves are BAD
07:21 Unbolting the exhaust manifolds
07:53 Peeling off the LH Valve cover, first look inside the engine
09:00 Unbolting the RH Valve cover. No damage here!
10:12 Removing the water pump and SAVING IT? What is this world coming to!?
10:54 Loosening the high pressure fuel lines
11:23 Cracking the Rocker arms loose on the RH Bank
12:00 Inspecting the rocker arms and pushrods
12:14 Cracking the headbolts loose on the RH Cylinder head
12:35 Lifting the RH Cylinder head, THATS BAD
13:47 THE RIGHT SCIENCE
14:45 Cracking the LH Rocker arms loose
15:52 CRACKing the oddheadbolt loose, and then the rest of the cylinder head bolts
16:38 Lifting the Left Cylinder head
16:49 THAT DOESN’T GO THERE
17:32 THE LEFT SCIENCE
17:50 Removing the high pressure fuel pump
18:46 Unbolting the valley cover to reveal the Dynamic Fuel Management solenoid set and harness
19:49 Removing the DFM system
21:33 unbolting the lifter trays and pulling the lifters out. ALREADY?
22:30 Unbolting the harmonic balancer
23:08 Re-engineering the harmonic balancer puller
23:18 I AM A RE-ENGINEER
23:41 Bangin’ the timing cover off
24:43 Removing the VVT Cam gear the wrongest way possible
28:31 I WIN, CHAIN LOSES
28:59 Sliding the camshaft out and checking for damage
30:11 Unbolting the oil pan
30:36 Oil pan in the oil pan
32:04 Inside of the oil pan is SLUDGE but no shrapnel, How?
32:53 Dismantling the oil pump, Is this an Improvement over the L83?
34:48 The horror inside the crankcase, Just WOW
35:44 Unbolting the rods and pistons and driving them out with my new tool that YOU GUYS sent me 🙂
38:47 We got the crank to turn!
42:02 Unbolting the main caps, these were TIGHT
45:00 Pulling the crankshaft out of the block
45:24 Full rotating assembly inspection, block, crank, rods and pistons, all bearings rings.
52:43 Summary
As always I hope you enjoy this video. I love all of the comments, feedback and even the criticism. Catch you on the next one!
-Eric
