The term 'big block' is related with automobile engines. It is actually a series of engines that were of large displacement and were developed several years ago. A proper manifold should be installed on a vehicle to make sure that the engine runs efficiently. It is not too hard to install a manifold on a big block. Here is a simple guide.
Tools Needed
- Basic tools like ratchet, wrench and torque.
- Protective gear like safety clothing
Air Ratchet Wrench
Materials Needed
- Silicone sealant
- Non-hardening sealant
- Oil
- Rags
Guidelines
Step 1:
Every gasket has to be inspected and it must be made sure that they are sealed in a proper way. If bolts require sealing, then it is better to seal them quickly. The gasket and the water ports have to be given particular attention. If the decks of blocks or heads were machined, then they may appear to be lower. If cork or rubber gaskets are present in the intake, then the block would not get firmly fixed to the manifold. To make an air tight connection, it is suitable to use silicone.
Step 2:
Now, the manifold has to be installed. Ensure that everything is right with the oil splash guard. When satisfied, lower the manifold into place. Ensure that adequate help is available to line up the manifold bolt holes. Some adjustments have to be done for lining up the holes.
Step 3:
The possible leaks should be sealed now. It is essential to understand that a lot of bolts ultimately end up close to the head area. There will be a lot of oil present. To prevent leaks, it is ideal to use non-hardening sealant on the bolts.
Step 4:
Once the bolts on the manifold and block have been tightened, it is essential to understand the tightening and loosening sequences which are needed. Some can vary but the loosening and tightening sequence of many blocks and manifolds start from the middle and go outwards.
Step 5:
It is important to ensure that each bolt is tightened to the same rating with torque wrench. However every bolt may not be accessed with a torque wrench. In case this happens, then use a box wrench.
Step 6:
This task requires working with larger vehicle and steel parts, it generally means that it is important to follow safety precautions. Anyone who is helping in this task must also be aware of the safety measures while installing the manifold.
Tips & Precautions
- Safety should be your topmost priority at all times. When lowering the manifold to its position, specific precautions must be followed. Caution must also be exercised when silicone is being used as a sealant.
- This is the process to do the task in a DIY style, it is helpful to save a pretty fine amount of money.