This is the FIRST, 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 covers 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 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 II:    • 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:

GM factory service manual for this engine: https://ebay.us/ExJjhf

The yellow paint marking pen I used: https://ebay.us/F76p1r or on https://amzn.to/374RWdX

And if I've saved you some $$ here, consider some coins for the coffee tipjar! https://kofi.com/drshock

1996 1997 1998 1999 2000

Chapters:
0:00 Problem overview
1:00 Removing the fan shroud, belt, pulley
4:25 Removing the ducting, throttle cables, bracket, evap
9:15 Disconnecting the AC compressor, evap, battery
14:31 Disconnecting wiring connectors, pcv hose
22:17 Loosening AC compressor/PS bracket, egr tube
30:36 Drain engine coolant, disconnecting hoses
49:07 Removing harness brackets, ignition coil
54:03 Disconnecting PB vacuum hose
56:18 Removing the distributor
1:03:53 Disconnecting the fuel lines
1:05:58 Loosening the valve covers
1:07:00 Removing lower intake manifold bolts
1:09:06 Checking for removal of intake manifold assembly

#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.