2012-03-06 : Rebuilt GM (Chevrolet) 3100. New main bearings, rod bearings, camshaft bearings, piston rings, head gaskets, valve cover gaskets, EGR gaskets, intake gasket, plenum gasket, Exhaust manifold gaskets, valve stem seals, thermostat, oil pan gasket, oil pump, water pump, oil filter, engine oil, and paint.
I neglected to include piston rings in the audio, but the engine does have the new rings.
3100 Engine Rebuild
Rebuilding a 3100 V6.... Repair cost was $1,200 using Re-man cam and crank.
How To Unsieze An Engine
This is the diesel I got for the Astro van, basically free, with the 700R4
transmission. Which ironically turned out to be a great transmission, the
only one of three that has a good fourth gear, but I rebuilt it anyway.
Who knew a 30 year old automatic could still be sweet inside.
I have unsiezed this diesel engine like this three times now. It
obviously has some internal problems. So its on the list to get a tear
down and rebuild, right after the Ranger is back together. It takes about
an hour or more to get this motor turning over 360 deg. Then it won't
quite fire, but makes little smoke puffs.
The starter in the 6.2 diesel has some serious torque, sucks the battery
voltage down and makes a tremendous amount of heat. It still takes an hour
of cranking an eighth of an inch at a time.
Spinning over a V6 GM engine
The piston sequencing is shown for a 3.4 liter GM V6 engine.
Note, it turns out that I numbered the cylinders wrong, what I call #1 is
actually #2, and what I labelled as #2 is actually #1.
So the Actual firing order as a regular V6 engine, is 1,2,3,4,5,6, I
know, weird, but that is they way they made them. I am more used to V8
engines, so that is why I numbered the cylinders the way I did.
Either way though, it shows that the crankshaft will not work as it is for
the Junkyard Deltic project. Time to cut and weld the crank!!!!!!!!
blowing a 3.1 mpfi v6 engine
customer brought in a Z24 just like mine! 3.1 5 speed... 3.1 was blowen,
sounds like a wrist pin let go. for the same price of replacing the old 3.1
with another old 3.1, he decided to bring it to me, the expert! and have a
3400 SFI installed!
GM 3.1 V6 Blown Head Gasket Test
This video was taken after replacing the upper and lower intake manifold
gaskets, a very common problem for this motor. We had compression tested it
and tested for hydrocarbons in the radiator before repairing the intake and
neither indicated a blown head.
It was not until we tried to get all the air out of the cooling system for
several hours that I decided to do a cylinder leakdown test which, in this
case, proved to be a far more accurate test in indicating blown head
3.4 gm engine knock
I am up for any suggestions on what this noise is. This is an engine i got
from the junk yard. I don't know the previous history. The engine
knock/ticks continuously. Even after its been running for 15 min or longer
the sound doesn't go away. The engine shakes nothing erratic. I don't have
any check engine lights on or any others warning lights in the dash. I did
put a new lower and upper intake gasket. I tried to make sure that I kept
the push rods in correct order and torque rocker arms to specs. Then engine
is from a 2004 impala and my car is a 1999 Alero. I had to use the old
intake manifold from the 99. For egr purpose. I poked around with a
stethoscope and kinda sounds like the noise is from the mid area between
oil pan and heads right where they connect. Sorry for the poor audio I am
using my cell phone.
GM 3400 / 3100 3.1 3.4 Engine Misfire Cause & Causes Miss Missing P0303
Here is a video for fellow GM 3400 & 3100 liter engine owners. Have a
misfire? This video explains the causes for what could be causing the
problem. Mine showed up as a P0303 cylinder 3 misfire. Couldn't figure it
out, but finally did. The spark plug and wire were replaced along with a
new coil. Could hear the injector firing with a stethoscope but still had
the miss. Found out after tearing into the intake that the lower intake
If your car is missing out, first try the following. Check for spark and
check the spark plug, wire and coil. A test you can do if it randomly
misses is in the dark, spray a mist of water around the plug wires. If you
see blue arcing, you've found the problem. But be careful not to zap
yourself, IT HURTS!
If the spark is good the listen at the injector. Is it firing and
clicking? If not, you've found the problem.
If both those seem good, then check for compression. Do this with a
compression tester available at any Autozone with the loan a tool program
If all 3 of those check out then it's a possible vacuum leak. May be time
to do an intake manifold gasket repair as they are known to go out. But,
if you do have to do an intake manifold gasket fix, go ahead and replace
the head gaskets too. You'll be glad you did. Not fun taking it all back
apart again. Check out my youtube channel for these videos both on doing
the lower intake manifold gasket and the head gasket.
Got questions about this engine? Leave a comment in the section below and
I'll try to help!
CHANGING SPARK PLUGS AND WIRES GM 3.1/3.4 V6
Please like and subscribe this video comment with questions
you can always email me at email@example.com
in this video joetheautoguy shows you how to change plugs and wires on a
general motors 3.1 liter v6. these have many different ways but i find that
this is the easiest.
check out my blog for a little more insight on this repair
2000 Chevrolet Malibu 3.1L Engine Knock
I have a Malibu with what sounds like the famous piston slap, however it
doesnt go away. I replaced the lifters because I had to replace a leaking
intake gasket anyway. It has new plugs and wires and has always made the
sound even before replacing them. It sounds like it's coming from the top
of the engine however I am open to any and all diagnostics. Please leave a
GM ( Chevrolet or GMC ) 4.3 L V6 Engine Tear Down
This video goes through the teardown process of a GM 4.3L V6. It has been
removed from the vehicle and we take it apart, except for crank and piston
The automobile consist of:
• Fuel System: Purpose is to deliver fuel to the engine. It consists of
the fuel tank, pump, gauge/sensor, filter, pressure regulator and
• Air Intake System: Purpose is to clean and direct outside air into the
engine. It consist of air filter, ducts, air plenum and intake manifold.
• Exhaust System: Purpose is to
direct Exhaust gasses out of
combustion out of engine. It consists of the Exhaust manifold, converters, pipes and
• Cooling System: Purpose is to remove excess heat from the engine. It
consists of water pump, hoses, radiator, thermostat, cooling fan and
coolant recovery tank. Also the oil system serves as a cooling system as
well as a lubricating system. It consist of oil pump, pan, filter and
1. Clutch: Purpose is to connect the engine and transmission together. It
consists of clutch drive disc, driven disc, release bearing, clutch fork,
cable, slave cylinder, master cylinder. There are three types of clutch
systems: mechanical, cable and hydraulic.
2. Transmission: Purpose is to match engine speed to road speed. Two types
used are manual or automatic. These consist of gears, linkages, cables and
converters for automatics. A manual is connected to the clutch by a
flywheel and automatic by a flexplate.
3. Driveshaft: Purpose is to connect the transmission to the rear axle. It
consists of a slip yoke, shaft and universal joints.
4. Rear axle differential: Purpose is to change the angle of motion from
engine to the wheels. It also divides torque between the wheels. It
consists of a ring and pinion gear, carrier, bearings, crush sleeve and
5. Wheels/Tires: Purpose is to provide traction to the road as well as
carry the weight of the vehicle.
Vehicle Control Systems:
1. Brakes: Purpose is to slow and stop the vehicle. It consists of master
cylinder, brake Booster (vacuum or
hydraulic), calipers, drums, pads and rotors.
2. Steering: Purpose is to direct vehicle in the required direction.
Consists of steering gear (rack & pinion), steering wheel, column,
inner/outer tie rods, pump, reservoir, hoses and pipes.
3. Suspension: Purpose is to provide stability and handling while also
providing comfort to the ride. Consists of shocks, struts, sway bars, end
links, springs, trailing arms and bushings.
1: Heating Ventilation Air Conditioning (HVAC): Heats and cools interior
air to passenger comfort. Also circulates outside and inside air.
• Air Conditioning: Consist of condenser, compressor, accumulator
(receiver/dryer) orifice, expansion valve, hoses, evaporator, controls,
actuators and modules.
• Heating: Consists of heater core, valves, hoses and switches.
1. Power Generation: Creates electrical power to run all the electrical
systems. Consists of the alternator.
2. Power storage: Stores unused power to start the car and supply voltage
to the alternator to create more electricity.
• Both systems consist of wiring, harnesses, fuse, relays and modules
GM 60 degree V6's
These are some of the finest, most reliable engines, period. Really good
engines. The sounds are, Heartbeat of America, 2.8 rev, 3.1 rev, 3.4 dual
cam rev, Heartbeat of America