LS engine accessories are determined by what harmonic balancer is on the LS engine.
This picture shows how to measure and determine what you have.
GM V8 Early Style Motor Mounts 1955-1972
1955-1972 Small and Big block Chevrolet engines use the same style 3 bolt engine mounts other than 60-72 C10's. Early Style SBC/BBC Gen 1 engine mounts available today are classified as Short and Wide or Tall and Narrow. To determine which motor mount will fit you will need to measure your existing frame perch on your vehicle. You never know if a previous owner installed different frame perches than what came in that vehicle from the factory. If you have a GM non Chevy vehicle or a Chevy vehicle that did not start out as a V8, you have to purchase the Chevy version frame perches. Frame perches go by many names such as towers, mounts, and stands. For example, if you have a 1968 Pontiac GTO then you need to purchase 1968-1972 Chevelle frame perches as that is the A-body Chevy equivalent. Even though it is a Pontiac, it will still have the bolt holes on the engine crossmember for Chevrolet V8 frame mounts. If you can't find V8 Chevy frame mounts for your application, then check out this Clam Shell Method.
A lot of aftermarket front clips from companies such as Total Cost Involved (TCI) are designed to run the Early Style Short and Wide motor mounts on a welded tubular piece for the through-bolt.
Short And Wide
OEM Part Numbers(Rubber): 3990914, 3960768, 6258154
Aftermarket Part Numbers(Rubber): 2142, 2285, 2267
Energy Suspension (Poly): 3.1114 Zinc, 3.1115 Chrome (G-Black, R-Red)
Tall And Narrow
OEM Part Numbers(Rubber): 3962740, 3990918, 3962748
Aftermarket Part Number(Rubber): 2283
Energy Suspension (Poly): 3.1117 Zinc, 3.1118 Chrome (G-Black, R-Red)
TCI Mustang II IFS setup with the tubular through-bolt piece for a Short and Wide
GM V8 Clam Shell Style 1972-99
4-bolt Style Clam Shell Mounts have mounting holes for bolts on all four corners. Often only three holes are used.
Not to be confused with the the 3 bolt style Clam Shell Mounts where they only have 3 mounting bolt holes.
A- Mounting bolt holes that are flush to the engine crossmember/V8 frame perch
B- Rivets/welds holding the clamshell together.
The motor mount and motor mount bracket in the following photo goes by a lot of names. A and B make up the Clamshell Style engine mount. GM refers to A as engine mount and B as a bracket. Nowadays, A is most commonly referred to as engine mount while B is most commonly reffered to as the Clam Shell. Engine mount is a loose term however and in order to not confuse the style of motor mount you have with the Early Style, you can refer to them as the Clamshell Mount. A can also be referred to as: rubber isolator, rubber mount, SBC/V8 engine/motor mount, "mounting, engine". B can also be referred to as: buckets, elephant ears, cups, motor/engine mount bracket, "bracket, engine mount", "bracket, engine mt". The Clam Shell Style started to phase out the Early Style Short and Wide/Tall and Narrow's in 1972.
OER makes reproduction Clams Shells but you have to understand that they are not a one size fits all. 2WD and 4WD 1973-1987 C10 will not interchange for instance. If you are removing the Clam Shells for any reason, such as replacing the Clam Shell Mount, don't forget to label them as passenger and driver side so the install is much easier.
The Clam Shell Mounts and the Clam Shells themselves will vary depending on application.
SBC's typically used a 4-bolt Clam Shell Mount while the BBC's and Diesels used a 3-bolt Clam Shell Mount.
There are a couple of different poly inserts for Clam Shell Mounts.
4 Bolt Style
Energy Suspension part number 3.1116 (G-Black, R-Red)
Replaces the inserts of the following G.M. type mounts: 14039437, 9762326, 467422, 1001132, 10001133, 9764714, 459021
Replaces the inserts of the following Aftermarket type mounts: 2292
3 Bolt Style
Energy Suspension part number 3.1121 (G-Black, R-Red)
Replaces the inserts of the following G.M. type mounts: 15731260, 15529451, 15529452, 15592505, 22145334
Replaces the inserts of the following Aftermarket type mounts: 2621
1988-00 4WD V8 and Diesel 3 Bolt Stepped Style
Energy Suspension part number 3.1152 (G-Black, R-Red)
Replaces the inserts of the following G.M. type mounts: 15659675, 15732188
Replaces the inserts of the following Aftermarket type mounts: 2637
1998-2002 Camaro/Firebird Style
Energy Suspension part number 3.1151 (G-Black, R-Red)
Replaces the inserts of the following G.M. type mounts: GM GENUINE 22179268
Replaces the inserts of the following Aftermarket type mounts: 3064
*We currently only sell the black graphite ones.
Install Instructions
**We cut the end off of one for the passenger side to clear an embossment on an LS engine
63-72 V8 C10 Using 67-72 V8 Frame Perches
SBC Aftermarket(Rubber): WESTAR EM2282, DEA / MARMON RIDE CONTROL A2239, ANCHOR 2282, PIONEER 602239
SBC Energy Suspension(Poly): 3.1156 (G-Black, R-Red)
4.6L Ford V8 for Mustang LS Swaps
Ford OEM Genuine: 2R3Z-6038-AB (Right)/2R3Z-6038-AA(Left)
Aftermarket(Rubber): WESTAR EM3001(Right)/EM3002(Left), DEA / MARMON RIDE CONTROL A3001(Right)/A3002(Left), ANCHOR 3001(Right)/3002(Left),
4.6L Ford Poly Energy Suspension Poly Mounts 4.1127 (G-Black, R-Red) comes with passenger and driver side
What's the difference between red and black Energy Suspension motor mounts? Black has graphite which adds a lubrication property. Red will squeek over time unless lubricated. Energy Suspension reccomends their Formula 5 prelube. Why choose Energy Suspension and transmission mounts over rubber? The biggest reason is the safety interlock. Take a look at the following photos to see the molded-in safety interlock. If anything crazy happens and the poly rips or melts from a fire, the safety interlock will still hold your engine down. The OEM or aftermarket rubber mounts would split in half and your engine would be jumping around like a fish causing a lot of havoc in the engine bay.
This is one of the reasons you will see people converting their Early Style SBC motor mounts to the Clam Shell Style. Even if the rubber deteriorates, the engine is still held in place by the metal housing holding what was left of the rubber isolator. Aftermarket Clam Shell Mounts rubber isolator tend to sag over time or become unseated entirely from the middle. GM Clam Shell Mounts last much longer than the aftermarket, but with the much higher price it is cheaper to use the Energy Suspension Poly inserts. Poly lasts longer and is more performance oriented. A stock GM Clam Shell Mount metal housing is made of thicker material than these aftermarket Clam Shell Mount metal housings and it is preferred to clean up an old dirty OEM Clam Shell Mount metal housing than to buy a new aftermarket one with the poly insert.
Energy Suspension FAQ
"Original Equipment Manufacturers (OEM) choose to use rubber in their bushings for several reasons, including costs and comfort characteristics. Rubber offers less NVH (noise, vibration, and harshness) since it is soft and compliant, however, during spirited driving, the pliability allows for changes in alignment during acceleration, braking, and hard cornering.
Much like your rubber tires, rubber bushings wear out, especially when considering common factors such as heat and harsh fluids. Rubber bushings with direct UV exposure will dry out, crack, and rot, causing vital suspension components to function poorly. Some OE replacement parts use lesser quality grade rubber which may wear or fail quicker than the OE factory rubber.
Unlike rubber, our Hyper-Flex™ polyurethane is extremely resistant to harsh fluids. Our bushings will not dry out, rot, or crack from heat or UV exposure. Polyurethane offers superior precision during spirited driving, eliminating deflection caused by the soft pliability of rubber."
How stiff are they? These are all at 70A-70T Durometer.
Prothane mounts in comparison are at 80A.
On LS 3 engines- some came with a factory oil cooler that mounts on the drivers side of the block.
This will have to be removed and install a factory coolant plug GM part # 12561663 and requires a 17MM allen wrench to install.
When installing the LS engine into 4X4 truck the front drivers side cross member will need a slight notch.
The front oil pan will slightly touch-
On a 1987-1999 Chevrolet/GMC truck that came with a V6 you will need to remove the V6 mounts and purchase the factory V8 mounts. They will install in the same holes where you remove the V6 mounts. Anchor motor mounts part number 2621.
Different 6 speed transmission and shifter lengths-
LS Alternator wiring-
LS Power Steering Pressures-
Corvette C5-C6, Cadillac CTSV, Pontiac G8
Vette Ls1, LS2, LS6, LS7, LS9- 2.4/2.8 GPM 1250/1350 psi
Cadillac CTSV LS2, LS3. LS6- 1.9-2.1 GPM 1640/1740 psi
Cadillac CTSV LSA- 2.7 GPM 1625/1850 psi
Pontiac G8 - 2.0 GPM 1200/1300 psi
GTO F-Body
Camaro 1998-02- 2.7-3.1 GPM 1200-1300 psi
GTO All- 1.95-2.35 GPM 1100/1200 psi
Vortec Truck
C1500, C2500, C3500- 3.0-3.9 GPM 1425-1550 psi
Trailblazer LS2- 2.7-3.1 GPM 1400-1500 psi
88-98 OBS c1500 2.5-3.0 GPM 1100-1250 PSI
Borgeson makes a shim kit to lower pressures on GM power steering pumps if you are running a small diameter pulley and the pressure is too high HERE.
Making custom length MSD spark plug wires when removing the coils from the valve covers and mounting further away.
Super Conductor, Black, 25' Bulk Wire
MSD P/N 34013
LS1, 45-degree boots & terminals
MSD P/N 3304
Silicone straight boots & Terminals
MSD P/N 3301
