engine overhaul
DESCRIPTION
TRANSCRIPT
Engine OverhaulEngine Overhaul
Chevy 350Chevy 350
Remove Engine Remove Engine
Place engine securely on an engine stand
Remove AccessoriesRemove Accessories
Remember to take photos- bag and label the parts and fasteners
Remove Intake and Valve Remove Intake and Valve train Componentstrain Components
Label the pushrods – this is to identify if you find a bent one later to look at the other parts for that cylinder.
Remover Cylinder HeadsRemover Cylinder Heads
Remove the head bolts in reverse sequence--- Check for damage especiallybetween cylinders
The Engine’sIdentificationNumber isFound Here
Remove Lifters Remove Lifters
Rotate the engine – it will pop the lifters up for easy of removal
Ridge Ream Each Ridge Ream Each CylinderCylinder
A ridge develops over time and must be removed to allow the piston to be removed
Remove all Ridges Remove all Ridges
Two wrenches opposite of each other give you good control
Remove Oil Pan and Remove Oil Pan and InspectInspect
This is a four-bolt main – Pay attention to the oil pickup screen, look for debris
12
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Mark the main and rod capsfor reinstallation
Use number and Letter sets
Remove Gaskets and Scrape Remove Gaskets and Scrape Away CrudAway Crud
Wiggle out the oil dipstick tube, it will be damaged if you don’t.
Remove Balancer and Front Remove Balancer and Front CoverCover
Loosen the Main BoltsIn Reverse Sequence
Remove the Harmonic balancer with the proper tool or you will damage it.
Remove TimingGears and ChainToss Them
Remove Pistons and Remove Pistons and Main CapsMain Caps
Tap the pistons out with a plastic hammer– tap the mains from front to back to loosen
Remove Crank and Remove Crank and CamshaftCamshaft
Knock out the Freeze plugs Clean out water Jacket
holes
Remove Camshaft Remove Camshaft BearingsBearings
You need a specific tool for this– clean out all bolt holes with a tap
Clean the Internal Area Clean the Internal Area
Especially the oil galleries
Clean Out Lifter AreaClean Out Lifter Area
A long rod tipper with a rag soaked in cleaner works well for areas you can’t get your hand
Inspect Cylinder headsInspect Cylinder heads
Check everywhere, the heads are very prone to cracks and damage.
Cracks- You Don’t Want To Cracks- You Don’t Want To See ThisSee This
Clean the HeadsClean the Heads
A power brush works well and inspect head for cracks again, cover and plug the ports and valves if you don’t rebuild the heads. (why wouldn’t you?)
Spring Tool and Valve Spring Tool and Valve ToolTool
You will need to measure springTension and height
Cylinder Head Cylinder Head DisassemblyDisassembly
Use a “C” valve tool to remove valves—Keep everything in order
Inspect Valve, Springs, and Inspect Valve, Springs, and RotatorRotator
Inspect For CracksInspect For Cracks
Check Here
Valve GrindingValve Grinding
This resurfaces thevalve angle
Cut & Check Valve SeatCut & Check Valve Seat
Use Prussian Blueto check the contact between valve and seat
Valve AnglesValve Angles
Seat 45 degrees
15 degrees
60 degrees
Clean and Inspect Clean and Inspect PistonsPistons
At times you can reuse pistons, replacing them will improve the rebuild
Clean and Inspect the Clean and Inspect the Entire EngineEntire Engine
Preparation for PaintingPreparation for Painting
Acquire a Rebuild KitAcquire 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
Paint Heads Paint Heads
Cover valve area and block ports
Paint BlockPaint Block
Cover internal parts, you don’t need to paint where the oil will be, use high heat paint
Measure, Measure, Measure, Measure, MeasureMeasure
Measuring throughout the rebuild process will insure you buy the necessary items
Install CamshaftInstall Camshaft
Take care with the cam and it’s bearings when installing. Over lube this as you install.
Install Lifters Install Lifters
Lube the lifters heavily
Measure Ring GapMeasure Ring Gap
This gap needs to be precise, file the gap to specs
Install and Bolt Main Install and Bolt Main CapsCaps
You will want to confirm the inside diameter is correct and round
Make sure youline up the oils holefor the bearings
Bolt and Torque CrankBolt and Torque Crank
Use specifications and sequence for this and anything else in engine!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Over lubeEverything
Use Assembly Grease
Install Freeze Plugs
Fit the RingFit the Ring
Protect the rod
Use wood in the vise
Lube the Rod BearingsLube the Rod Bearings
Use assembly grease
Oil the ringsUse engine oil
Prep Pistons for Prep Pistons for InstallationInstallation
Align the ring gaps---in thirds
Install PistonsInstall Pistons
Use a plastic hammer handle
Use a ring Compressing tool
Install pistons one at a time and torque to specs
Installing Timing ChainInstalling Timing Chain
Mark the aligning Points with white outAnd align them for proper gear timing
Clean and Prep the Cylinder Clean and Prep the Cylinder HeadsHeads
Some people send the heads out tobe reworked, or buy replacement heads
Bolt and Torque the Bolt and Torque the HeadsHeads
Use Specs and Sequence Make sure you keep
the gaskets aligned
Install Rockers and Install Rockers and PushrodsPushrods
Use plenty of lube, this is the last area that gets oil on startup
Adjust Rockers ArmsAdjust Rockers Arms
Adjust the slack out, turn the rod in your fingers and turn adjuster until the rod stops spinningDon’t over do this.
Prepare the Front CoverPrepare the Front Cover
Check the timing marks again just to make sure. Use a little extra sealer in the corners.
Install Front CoverInstall Front Cover
Lube seal as youplace the cover over the crank
Use specs
Install Harmonic Install Harmonic BalancerBalancer
Use specs
Prep For Intake ManifoldPrep For Intake Manifold
Use a good sealer here to help the intake seal. Take care to keep gasket aligned
Place the GasketsPlace the Gaskets
Use a good sealer here to help the intake seal. Take care to keep gasket aligned
Use a little extra sealer in the corners
Install intake and Install intake and DistributorDistributor
You can wait for the distributor until later, if so covet the openings in the intake!!!!
Install Oil Pump and Install Oil Pump and FilterFilter
Install the oildipstick
You needTo adjustThe screen.How?
Wires Now or LaterWires Now or Later
Wire Looms are Wire Looms are ImportantImportant
You may wait untilexhaust is installed
Install Oil PanInstall Oil Pan
Use a good sealant here
Don’t turn engine Over if carb is installed
Install a fuelpump also
Install AccessoriesInstall Accessories
Valve covers
Exhaust manifolds
Water pump
Carburetor
Engine StorageEngine Storage
Bag and oil the engine if you plan to Bag and oil the engine if you plan to store the engine. store the engine.
Store engine in a place that is dry.Store engine in a place that is dry. You can place it on a wood skid to You can place it on a wood skid to
recover you stand.recover you stand.
Engine Break InEngine Break In Lots of conflicting info out there.Lots of conflicting info out there. Mr. B way.Mr. B way.
Spin the oil pump shaft with drill and get oil Spin the oil pump shaft with drill and get oil pressure in engine-replace distributorpressure in engine-replace distributor
Start engine, spot time the distributor and Start engine, spot time the distributor and check for leaks and make adjustmentscheck for leaks and make adjustments
If no problems, run engine at idle for two If no problems, run engine at idle for two minutes, the change rpms, two minutes each minutes, the change rpms, two minutes each rpm range.rpm range.
Don’t exceed four thousand rpms for the first Don’t exceed four thousand rpms for the first five hundred miles. Change oil at 500 miles. five hundred miles. Change oil at 500 miles. Them at 2000Them at 2000
Misc. Misc. Make sure you clean and inspect everything Make sure you clean and inspect everything
through the rebuild process, this will prevent through the rebuild process, this will prevent you from rebuilding a cracked block for you from rebuilding a cracked block for instance.instance.
Follow the book, specs, procedures, tests, info, Follow the book, specs, procedures, tests, info, measurements and sequences are all critical for measurements and sequences are all critical for success.success.
Organization is key.Organization is key. Replace all parts if you can.Replace all parts if you can. Sorry to say, it is cheaper to get a “crate” engine Sorry to say, it is cheaper to get a “crate” engine
now days- saves time, money and worry. They now days- saves time, money and worry. They even have a warrantee that you can’t provide.even have a warrantee that you can’t provide.