Engine Overhaul

1
Engine Overhaul

• Chevy 350

2
Remove Engine
Place engine securely on an engine stand
3
Remove Accessories
Remember to take photos- bag and label the parts
and fasteners
4
Remove Intake and Valve train Components
Label the pushrods this is to identify if you
find a bent one later to look at the other parts
for that cylinder.
5
Remover Cylinder Heads
The Engines Identification Number is Found Here
Remove the head bolts in reverse sequence---
Check for damage especially between cylinders
6
Remove Lifters
Rotate the engine it will pop the lifters up
for easy of removal
7
Ridge Ream Each Cylinder
A ridge develops over time and must be removed to
allow the piston to be removed
8
Remove all Ridges
Two wrenches opposite of each other give you good
control
9
Remove Oil Pan and Inspect
Mark the main and rod caps for
reinstallation Use number and Letter sets
1
3
2
4
This is a four-bolt main Pay attention to the
oil pickup screen, look for debris
10
Remove Gaskets and Scrape Away Crud
Wiggle out the oil dipstick tube, it will be
damaged if you dont.
11
Remove Balancer and Front Cover
Loosen the Main Bolts In Reverse Sequence
Remove Timing Gears and Chain Toss Them
Remove the Harmonic balancer with the proper tool
or you will damage it.
12
Remove Pistons and Main Caps
Tap the pistons out with a plastic hammer tap
the mains from front to back to loosen
13
Remove Crank and Camshaft
Knock out the Freeze plugs
Clean out water Jacket holes
14
Remove Camshaft Bearings
You need a specific tool for this clean out all
bolt holes with a tap
15
Clean the Internal Area
Especially the oil galleries
16
Clean Out Lifter Area
A long rod tipper with a rag soaked in cleaner
works well for areas you cant get your hand
17
Inspect Cylinder heads
Check everywhere, the heads are very prone to
cracks and damage.
18
Cracks- You Dont Want To See This
19
Clean the Heads
A power brush works well and inspect head for
cracks again, cover and plug the ports and
valves if you dont rebuild the heads. (why
wouldnt you?)
20
Spring Tool and Valve Tool
You will need to measure spring Tension and height
21
Cylinder Head Disassembly
Use a C valve tool to remove valvesKeep
everything in order
22
Inspect Valve, Springs, and Rotator
23
Inspect For Cracks
Check Here
24
Valve Grinding
This resurfaces the valve angle
25
Cut Check Valve Seat
Use Prussian Blue to check the contact between
valve and seat
26
Valve Angles
Seat 45 degrees
15 degrees
60 degrees
27
Clean and Inspect Pistons
At times you can reuse pistons, replacing them
will improve the rebuild
28
Clean and Inspect the Entire Engine
29
Preparation for Painting
30
Acquire a Rebuild Kit
This kit is a Mater rebuild kit
complete with the crank rods and pistons. You can
get a rebuild kits without these items or smaller
camshaft and valve train kits
31
Paint Heads
Cover valve area and block ports
32
Paint Block
Cover internal parts, you dont need to paint
where the oil will be, use high heat paint
33
Measure, Measure, Measure
Measuring throughout the rebuild process will
insure you buy the necessary items
34
Install Camshaft
Take care with the cam and its bearings when
installing. Over lube this as you install.
35
Install Lifters
Lube the lifters heavily
36
Measure Ring Gap
This gap needs to be precise, file the gap to
specs
37
Install and Bolt Main Caps
Make sure you line up the oils hole for the
bearings
You will want to confirm the inside diameter is
correct and round
38
Bolt and Torque Crank
Over lube Everything Use Assembly Grease
Install Freeze Plugs
Use specifications and sequence for this and
anything else in engine!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!
39
Fit the Ring
Protect the rod Use wood in the vise
40
Lube the Rod Bearings
Oil the rings Use engine oil
Use assembly grease
41
Prep Pistons for Installation
Align the ring gaps---in thirds
42
Install Pistons
Use a ring Compressing tool
Use a plastic hammer handle
Install pistons one at a time and torque to
specs
43
Installing Timing Chain
Mark the aligning Points with white out And
align them for proper gear timing
44
Clean and Prep the Cylinder Heads
Some people send the heads out to be reworked,
or buy replacement heads
45
Bolt and Torque the Heads
Use Specs and Sequence
Make sure you keep the gaskets aligned
46
Install Rockers and Pushrods
Use plenty of lube, this is the last area that
gets oil on startup
47
Adjust Rockers Arms
Adjust the slack out, turn the rod in your
fingers and turn adjuster until the rod stops
spinning Dont over do this.
48
Prepare the Front Cover
Check the timing marks again just to make sure.
Use a little extra sealer in the corners.
49
Install Front Cover
Lube seal as you place the cover over the crank
Use specs
50
Install Harmonic Balancer
Use specs
51
Prep For Intake Manifold
Use a good sealer here to help the intake seal.
Take care to keep gasket aligned
52
Place the Gaskets
Use a little extra sealer in the corners
Use a good sealer here to help the intake seal.
Take care to keep gasket aligned
53
Install intake and Distributor
You can wait for the distributor until later, if
so covet the openings in the intake!!!!
54
Install Oil Pump and Filter
You need To adjust The screen. How?
Install the oil dipstick
55
Wires Now or Later
56
Wire Looms are Important
You may wait until exhaust is installed
57
Install Oil Pan
Install a fuel pump also
Use a good sealant here
Dont turn engine Over if carb is installed
58
Install Accessories
Carburetor
Valve covers
Water pump
Exhaust manifolds
59
Engine Storage

• Bag and oil the engine if you plan to store the
  engine.
• Store engine in a place that is dry.
• You can place it on a wood skid to recover you
  stand.

60
Engine Break In

• Lots of conflicting info out there.
• Mr. B way.
• Spin the oil pump shaft with drill and get oil
  pressure in engine-replace distributor
• Start engine, spot time the distributor and check
  for leaks and make adjustments
• If no problems, run engine at idle for two
  minutes, the change rpms, two minutes each rpm
  range.
• Dont exceed four thousand rpms for the first
  five hundred miles. Change oil at 500 miles. Them
  at 2000

61
Misc.

• Make sure you clean and inspect everything
  through the rebuild process, this will prevent
  you from rebuilding a cracked block for instance.
• Follow the book, specs, procedures, tests, info,
  measurements and sequences are all critical for
  success.
• Organization is key.
• Replace all parts if you can.
• Sorry to say, it is cheaper to get a crate
  engine now days- saves time, money and worry.
  They even have a warrantee that you cant
  provide.