Complete digital official shop manual contains service, maintenance, and troubleshooting information for the Buick Reatta 1988-1991. Diagnostic and repair procedures are covered in great detail to repair, maintain, rebuild, refurbish or restore your vehicle like a professional mechanic in local service/repair workshop. This cost-effective quality manual is 100% complete and intact as should be without any missing pages. It is the same factory shop manual used by dealers that guaranteed to be fully functional to save your precious time.

This manual for Buick Reatta 1988-1991 is divided into different sections. Each section covers a specific component or system and, in addition to the standard service procedures, includes disassembling, inspecting, and assembling instructions. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. It is in the cross-platform PDF document format so that it works like a charm on all kinds of devices. You do not need to be skilled with a computer to use the manual.

EXCERPT:
1991-92 ENGINES General Motors - 3.8L V6 (VIN L)
Fig. 1: Locating Engine Codes
VALVE CLEARANCE ADJUSTMENT
No valve adjustment is required, as hydraulic valve lifters are used.
TROUBLE SHOOTING
REMOVAL & INSTALLATION
FUEL PRESSURE RELEASE
NOTE: To trouble shoot engine mechanical components, see appropriate table in TROUBLE SHOOTING article in GENERAL INFORMATION.
CAUTION: When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. Test drive the vehicle. Determine if any driveability problems remaining remain after the test drive cycle. For more information, see COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.
NOTE: For reassembly reference, label all electrical connectors, vacuum hoses and fuel lines before removal. Also place mating marks on engine hood and other major assemblies before removal. Disconnect negative battery cable. Loosen fuel tank filler cap. Connect Fuel Pressure Gauge (J-34730-1) to fuel line fitting (wrap shop towel around fitting to absorb leakage). Place gauge bleed hose into container. Open bleed valve to release pressure.
ENGINE
Removal
1. Remove hood. Release fuel pressure. See FUEL PRESSURE RELEASE .
Remove battery cables. Drain cooling system and crankcase oil. Remove windshield washer, radiator and heater supply hoses.
2. Disconnect all electrical harness connectors from engine. Remove drive belt.
Remove power steering pump and set aside. Remove air-flow duct and air cleaner. Remove cables and hoses from throttle body. Remove ignition coil ground strap.
3. Disconnect fuel lines and vacuum hoses. Disconnect upper engine strut. Raise and support vehicle. Disconnect exhaust pipe. Disconnect engine mount bolts.
Disconnect A/C compressor (if equipped) and set aside. Disconnect engine oil cooler lines (if equipped).
4. Remove lower transaxle-to-engine bolts. One bolt is located between transaxle case and engine block and is installed in opposite direction. Remove flexplate cover. Match mark flexplate to torque converter to ensure proper reassembly.
5. Remove flexplate-to-torque converter bolts. Disconnect engine support bracket at transaxle. Lower vehicle. Remove remaining transaxle-to-engine bolts.
Remove engine.
Installation
1. To install, reverse removal procedure. Fill radiator to base of filler neck. Start engine. Place heater-A/C control in A/C mode and at highest temperature setting. Run engine to 3000 RPM and back to idle 5 times to expel any trapped air in system.
2. Refill radiator as necessary. Install radiator cap. Allow engine to cool. Check coolant level in reservoir. Add coolant as necessary to bring level to ADD or FULL COLD mark.
INTAKE MANIFOLD
Removal
1. Release fuel pressure. See FUEL PRESSURE RELEASE . Disconnect negative battery cable. Remove plastic engine cover and air intake duct.
2. Remove spark plug wires and fuel rail. Remove exhaust crossover heat shield and power steering pump bracket. Remove alternator and bracket. Remove cable bracket, heater pipes and by-pass hose. Remove intake manifold bolts,
manifold, gaskets and seals.
Installation
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