Intake and Exhaust Manifolds With the engine-head assembly completed on the Chevy V-8, the next phase of engine re-assembly includes reinstallation of the intake and exhaust manifolds and the fuel pump.
Note: This is a summary of steps included in the automotive restoration procedures shown in this episode of Classic Car Restoration. These are general guidelines for restoration procedures on this particular make and model of vehicle, and for the level of restoration selected for this project. There may be variations in procedures depending model, condition of vehicle, level of restoration undertaken and the types of replacement parts or upgrade kits selected. Always follow proper safety precautions, and read and follow manufacturer's guidelines, diagrams and safety notices that come with any replacement parts or kit that you select.
Materials:
Standard automotive tools (socket-wrenches, screwdrivers, nut drivers, etc.)
Torque wrench
Gaskets and gasket sealants
Eye protection
Steps:
- The intake manifold is installed first. Before installing the manifold, the intake-manifold gaskets should be installed dry (using no gasket sealant) in their proper locations. Locator pins help position each one of the gaskets properly
- Next, lay the manifold-to-head gasket in position on top of the engine head.
Important: It's critical with most gaskets to ensure that they are installed right-side-up. On most gaskets, if there is an embossed number on the gasket (figure A), then the gasket is installed with the numbered side up. In this case, the procedure is simple since this manifold-to-head gasket is marked "this side down" to indicate the proper orientation.
- Once the gasket is properly installed, carefully lift and place the intake manifold directly onto the engine, lowering the manifold from above (figure B).
- With the manifold properly aligned, lubricate the intake-manifold bolts and install them finger-tight into their respective holes.
- Once all of the bolts are threaded, go back and tighten each down to the proper torque specs using a torque wrench. In the case of this engine, the bolts are tightened to 30 foot-pounds. Torque-tighten the bolts following a spiral pattern, starting in the middle section and working your way out.
- With the intake manifold installed, the next step is to install the exhaust manifold. Lubricate the bolt-threads, place them through the holes and position the exhaust manifold (figure C), but don't tighten the bolts yet.
- The exhaust-manifold gaskets (figure D) are installed with the steel portion facing out, away from the engine.
- Separate the gaskets along their perforations, and install each one in its respective location by simply slipping it between the manifold and engine (figure E). The open ears on these gaskets allow them to be dropped into place after the bolts have already been started.
- The front two manifold bolts also serve as the bolts that hold the generator bracket in place. Feed the bolts through the bracket, and position the bolts and bracket onto the manifold.
- With the bolts and bracket in place, tighten down the exhaust-manifold bolts using a socket wrench (figure F), starting with the center bolts and working outward. Initially, just snug the bolts down finger-tight.
- Once all of the bolts are in position, go back and tighten each down to the proper torque specs using a torque wrench. In the case of this engine, the bolts are tightened to 25 to 35 foot-pounds for the inner bolts, and 15 foot-pounds for the outer bolts. Again, torque-tighten the bolts following a spiral pattern, starting in the middle section and working your way out to the outer bolts (figure G).
- With the exhaust manifold secured, the next step is to install the fuel pump. This procedure is a little tricky since there is a metal plunger inside the engine where the fuel pump is installed. The plunger must be carefully lifted (figure H) as you insert the neck of the fuel pump into the engine opening.
- Install the fuel-pump gasket, and coat it on the outside with sealant (figure I). It's important to use sealant at this location as this is frequently the source of oil leaks.
- Once the sealant has been applied, carefully lift the plunger and hold it up as you insert the tang into the opening before the plunger falls. Once the fuel pump is in position, secure it with its mounting bolts (figure J). We torqued these bolts down to about 20 foot-pounds.
In the segment that follows, engine preparation continues with the installation of the clutch.
RESOURCES :
Corvette Black Book : 1953-2001
Model: 0933534477
Author: Michael Antonick
Corvette: The American Legend
Model: 0785343741
Author: Consumer Guide Editors
Classic Car Restorer's Handbook: Restoration Tips and Techniques for Owners ...
Model: 1557881944
Author: Jim Richardson
Order this book from Amazon.com
H.P. Books
Classic Car Restoration Guide: The Complete Illustrated Step-By-Step Manual
Model: 1850108900
Author: Lindsay Porter
Order this book from Amazon.com
Haynes Publishing
| 
)
)
)
)
)
)
)
)
)
)
