Finding rockers?

[davidlb512]

What do you look for on roller rockers, besides stud size and ratio, to match them for you car? I want to get a set for my '95 'Bird with the 3.4 V6, and as everyone knows that has the 3.4, it's a pain in the ass to find performance parts for. I know that for an N/A build, you probably wouldn't want to go over 1.6 or 1.65, but has anyone used a 1.7 roller rocker on an N/A with success? If you have non-self aligning rockers, must you replace them with non-self aligning, or can you replace them with self aligning rockers?

[Smittro]

What do you look for on roller rockers, besides stud size and ratio, to match them for you car? I want to get a set for my '95 'Bird with the 3.4 V6, and as everyone knows that has the 3.4, it's a pain in the ass to find performance parts for. I know that for an N/A build, you probably wouldn't want to go over 1.6 or 1.65, but has anyone used a 1.7 roller rocker on an N/A with success? If you have non-self aligning rockers, must you replace them with non-self aligning, or can you replace them with self aligning rockers?

Self aligning rockers?? What "roller rockers" are you talking about?? They made forged cranks, cams, forged rods, pistons, for the 3.4L single cam.. Where are you looking for parts?

[Smittro]

1.7's are the same as the 3.1L high valve rockers except the 3.1l does'nt always use roller rockers.. You wont be able to use high valve rockers on your motors heads.. Best you can hope for on you heads is a 1.6 roller top..

[Smittro]

some 3.1's use self aligning rockers.. You motor has regular crankem downs.. Your heads require crankem downs..

[Smittro]

what are your goals with the motor? What are you trying to get out of it?

[Smittro]

WHat you can do.... If you want the 1.7 rockers is....

2004 3500 heads, 1995 3100 pushrods.. Push rod guides must be modified to fit, 2004 LS6 GTO valve spring, 3400 pistons 1.7 ratio roller rockers from a Ford small block.

Or use 3500 heads rockers push rods..Both will require different injectors than the 3.4l iron head...

[Smittro]

1995 Generation 2 engine ends production in all cars.
Some 3100 engines had self aligning rocker arms
Plastic valve covers replaced with aluminum


1996 Lumina APV Minivan ends production along with the 3.1L FWD iron head motor
3400 introduced in some models with an increased intake valve (1.76") and D shaped exhaust port for increase flow.
OBD II computer system introduced
Full roller valve train introduced with roller fulcrum rockers and non adjustable preload
Self aligning rocker arms
Horsepower 185 (3400 only, varies slightly between models)
Torque 205 (3400 only, varies slightly between models)
Compression ratio 9.6:1 (all motors)
RWD engine ends production in all vehicles
Compression increase to 9.7:1.
Different camshaft profile
Different head design
Different Intake manifold design
Different Exhaust Manifolds
OBD II computer system introduced

1997 No changes


1998 No changes

3.4L DOHC engine ends production

1999 No changes

Gm Performance Parts division releases the 3.4L HT crate engine. Designed to replace tired 2.8L engines in S-10 trucks. Engine features larger oil pump, better cam design, stiffer springs, revised retainers and increased displacement over the 2.8L
Horsepower 160
Torque 194

2000 All engines now use the same 1.76" intake valves
Valve guides increase in size
Cam sync ring is now "single tooth design"


2001 Intake Valley Baffle
Modified Lifter Guide
More Durable Water Pump
Improved Bearings for Accessory Drive Belt Tensioner and Idler
High-Resistance Spark Plugs and Wires
Revised Throttle Body New Starter Motor
Sleeveless Coolant sensor
On-Road Vapor Recovery (ORVR) System for Montana and Aztek
Specific Oil Pan for Montana and Aztek
Revised Powertrain Control Module (PCM) for Aztek

2002 No changes


2003 Revised Crankshaft Bearing
Revised Cylinder Heads
Revised Pushrods
Revised Camshaft Journal
Improved Water Pump
Iridium Spark Plugs
Maximum Oil Change Interval Extended
Improved Starter Solenoid
Some models have no AIR
Cam sync ring is a 50/50 pattern of raised and lowered semi circles

DOHC Global FWD Engine DOHC Global RWD Engine

2004 3500 introduced in the Malibu 94mm bore, 84mm stroke
Graphite Head Gaskets
Improved Water Pump
Improved Sealing
Improved Flywheel
3100 and 3400 receive changes for common assembly with 3500 High Value V-6
3400's saw improved cam bearings, improved starter for minivans and sport-utility vehicles, more efficient catalytic converter and improved bearings
Horsepower 200 (3500 only)
Torque 220 (3500 only)
Compression ratio 9.8:1 (3500 only)

3.6L Displacement
Completely new design introduced in Buick Rendezvous Mounted transversely (like a FWD engine) yet powering an AWD drive train.
Aluminum engine block & Cylinder Heads
Four Cam Phasing
Full chain drive valvetrain system
Aluminum Pistons With Floating Wrist Pins & Oil-Jet Capability
Forged Steel Crankshaft
Sinter-Forged Connecting Rods
Structural Aluminum Oil Pan with Steel Baffles different from RWD version
Dual-Stage Variable Aluminum Intake Manifold
Advanced Sequential Port Fuel Injection
Electronic Throttle Control with Integrated Cruise Control
Coil on Plug Ignition
Engine-Mounted Micro-Hybrid Engine Control Module
Optimized Exhaust Manifolds with Closed-Coupled Catalytic Converters
Fully Isolated Composite Camshaft Covers
Outstanding Noise, Vibration and Harshness Control
Horsepower 245
Torque 235
Compression 10.2:1
3.6L Displacement
Completely new design introduced in Cadillac's
RWD in CTS
RWD or AWD in SRX
Aluminum Engine Block & Cylinder Heads
Four Cam Phasing
Full chain drive valvetrain system
Aluminum Pistons With Floating Wrist Pins & Oil-Jet Capability
Forged Steel Crankshaft
Sinter-Forged Connecting Rods
Structural Aluminum Oil Pan with Steel Baffles different from FWD version
Dual-Stage Variable Aluminum Intake Manifold
Advanced Sequential Port Fuel Injection
Electronic Throttle Control with Integrated Cruise Control
Coil on Plug Ignition
Engine-Mounted Micro-Hybrid Engine Control Module
Optimized Exhaust Manifolds with Closed-Coupled Catalytic Converters
Fully Isolated Composite Camshaft Covers
Outstanding Noise, Vibration and Harshness Control
Horsepower 255 (Cadillac CTS only)
Horsepower 260 (Cadillac SRX only)
Torque 252
Compression 10.2:1

2005 Long relief A500 upper and lower thrust bearing (3100 only)
Exhaust manifold and gaskets (3100 only)
Revised throttle body gasket material (3100 only)
Modified fuel rail assembly to implement the "shrouded tip" Multec 2 Injectors (3100 only)
7.5 watt, post-converter oxygen sensor (3100 only)
New application in 2005 Chevrolet Equinox (3400 only)
24-X encoded crankshaft (3400 Equinox only)
Specific oil pan and improved oil pan gasket material (3400 Equinox only)
New intake manifold and improved intake manifold gasket (3400 Equinox only)
New engine cover (3400 Equinox only)
Electronic throttle control (3400 Equinox only)
Returnless fuel rail and pipe assembly (3400 Equinox only)
Neutral torque axis engine mount (3400 Equinox only)
Air gap exhaust crossover (3400 Equinox only)
P05 controller (3400 Equinox only)
Expanded applications (3500 only)
Large pin iron crankshaft (for Chevrolet Uplander, Saturn Relay, Pontiac Montana SV6) (3500 only)
Improved throttle body (3500 only)
PTFE crankshaft seals
Modified fuel rail assembly to implement the "shrouded tip" Multec 2 Injectors (3500 only)
Acoustic cover for Malibu and G6 applications (3500 only)