Can you reuse exhaust valves?
If you simply regrind and reuse the valves without replating them, the valves may stick or gall when the engine is first started or if it overheats. Some engine rebuilders will reuse the intake valves but replace the exhaust valves (because the exhaust valves run hotter and are more vulnerable to failure if reused).
How to remove and replace valves in a cylinder head?
You need to remove the schrader valve first before you attempt this, if not, air will not flow into the cylinder. You can also use a piece of rope or equivalent to keep the valves from dropping into the cylinder while you work. This method works well if you’re just replacing the valve seals.
What’s the best way to remove an exhaust valve?
Once both of the retaining clips are removed relax the pressure on the valve spring and remove the spring and retainer from on top of the head. 4. Reach under the head and slide the valve out the bottom being careful not to damage the valve seal or the valve guide.
Can a rebuilder replace a valve guide head?
Most rebuilders either go new or rechromed valves with oversized stems. Replacing guides heads, as is knurling. Most rebuilders have tried all of these
What does a cylinder head do for the engine?
Cylinder heads also house the valves that direct airflow. Intake valves draw in fresh air, combustion occurs, then exhaust valves allow the burnt air fuel mixture to exit the combustion chamber. An internal combustion engine is basically just a fancy air pump.
You need to remove the schrader valve first before you attempt this, if not, air will not flow into the cylinder. You can also use a piece of rope or equivalent to keep the valves from dropping into the cylinder while you work. This method works well if you’re just replacing the valve seals.
Can you clean an exhaust valve without tearing down the engine?
While this is a major amount of work, it can be done with the engine in the car, and without fully tearing it down. It depends what you mean by “tearing down”. To clean a valve, you need to remove it from the cylinder head, and that always means removal of the cylinder head.
What happens when you remove the exhaust manifold?
The clip made it past the intake valve, and became lodged between the exhaust valve and seat. Removing the exhaust manifold allowed access to the exhaust valve and the wayward retaine Simply put, Andy Thomson nailed it on the head. If you have something “stuck” to an exhaust valve , you are likely performing engine disassembly.
Is there anything you can do about a leaking cylinder head?
There is nothing you can do to “fix” the situation without removing the cylinder head (s) and having a complete valve job done. You might get by on the cheap and simply replace the known leaking seals; that would be false economy since the other seals are probably not far from wearing out and also leaking.