This is the SECOND, of a TWO part DIY fully detailed tutorial on the removal and rebuild of the upper and lower intake manifold assembly from the GM Vortec V8 truck engines (both 5.0L and 5.7L). The motivation for this repair was initially to address a long ignored lower intake manifold gasket engine oil leak, but during the disassembly process we identified an upper intake manifold gasket oil leak as well as significant accumulation of carbon deposits internally, leading to the necessity for a full intake manifold (upper and lower) rebuild.

Part one previously covered all the preparation for removal of the intake manifold assembly from the Vortec engine. Part two covers the disassembly, cleaning, decarbonization, repairs, part numbers, reassembly, and reinstallation back onto the engine. In part two here we also go over the camshaft retard timing adjustment procedure necessary after disturbing the distributor in performing this repair.

The vehicle illustrated is a 1998 Chevrolet Cheyenne K2500 with the 5.7L vortec engine, but the procedure, parts, and techniques shown are applicable to any 1996 thru 2000 old body style (OBS) GM truck GMT400 type such as the Chevrolet Silverado, GMC Sierra, Chevrolet Suburban, Chevrolet Cheyenne, Chevrolet Tahoe, GMC Suburban, Cadillac Escalade, or GMC Yukon. This procedure is also applicable to many G vans like the Chevrolet Express and GMC Savana as well. Procedure applies to both 5.0L and 5.7L Vortec V8 engines.

Also applicable to some Holden branded GM trucks in Australia of this same time period with the same engine.

Link to part I:    • 1996  2000 GM OBS Truck Vortec V8 In...  

The eBay and Amazon search links below are paid links, for which I may be compensated and earn a commission, if you choose to buy the parts and tools shown in this video thru them:

For the GM factory service manual for this engine: https://ebay.us/uX8TYs

The GM RTV engine sealant GM 12378521 and lower intake manifold gasket GM 89017465: https://ebay.us/8JbNfI and https://amzn.to/3K7zLCu (sealant) https://amzn.to/3LErWos (gaskets)

The GM 12345382 threadlocker medium blue: https://ebay.us/ACFSYk

GM 12632948 thermostat (ACdelco 131151), GM 12555896 EGR gasket (ACDelco 219197): https://ebay.us/MHPLgC and https://amzn.to/3DC8Lst

GM 10046089 valve cover gasket: https://ebay.us/xwcecc and https://amzn.to/37dRTvS

Distributor mounting bolts GM 10457666, shaft gasket GM 10108445, rotor GM 10452457 (ACDelco D465), cap GM 10452459 (ACDelco D329A): https://ebay.us/oC4NpD and https://amzn.to/3u3RXaQ (bolts) https://amzn.to/3K7h1mS (gasket) https://amzn.to/35Fvure (rotor) https://amzn.to/3NM2mzs (cap)

EVAP purge solenoid gasket GM 10490666, PCV cover GM 12552752, MAPP sensor GM 19418808, PB vacuum fitting GM 12602245: https://ebay.us/Kon8fq and https://amzn.to/3DEilLp

Upper intake manifold gasket kit GM 17113206: https://ebay.us/5C5rMx and https://amzn.to/3qY7tmu

Fuel line seals GM 19258137 (return) and GM 22514722 (inlet) ACDelco 217452: https://ebay.us/9ZdVB7 and https://amzn.to/3DyBoa6

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1996 1997 1998 1999 2000

Chapters:
0:00 Part I overview
0:47 Removing valve covers and intake manifold assembly
3:54 Intake manifold assembly inspection
7:48 Removing the upper intake manifold
13:42 Cleaning progress
17:59 Disassembling and cleaning the lower intake manifold
26:14 Reinstalling the lower intake manifold
34:08 Reassembling the lower intake manifold
35:48 Reinstalling valve covers
36:22 Torque values around lower intake manifold reassembly
38:22 Distributor rebuild and reinstallation
42:29 Reassembling the upper intake manifold
52:58 Reinstalling the fuel meter body and injectors
56:16 Torque values around upper intake manifold reassembly
58:44 Reinstalling and torque on the fuel lines
1:01:17 Final reassembly checks
1:02:00 Camshaft retard offset timing check w/Tech2

#drshock #obstruck #obstrucks

Disclaimer: DrShock, the alias for the human content creator for this YouTube channel, is not responsible for any damages, injuries, losses, or liabilities associated with any repairs, upgrades, or maintenance performed on yours, or any other, vehicle whatsoever. No warranty, express or implied, is made as to the accuracy or completeness of any information provided within this channel. Viewing and using the “asis" information of this channel is totally at your own risk. Always wear personal protection equipment and follow appropriate vehicle manufacturer service manual guidelines with original manufacturer parts only when performing any repairs, upgrades, or maintenance upon any vehicle.