What kind of valve does a cylinder head use?
By far the most common cylinder head mod we do for TC and EVO customers is a simple, but very effective valve and blend job. We use a 1.900˝ intake valve and a 1.610˝ exhaust valve with a proven seat angle package and blend the chamber and bowls to wake up the port.
How big is the exhaust valve on a Harley Davidson?
Next in line is a 2.00˝ valve modified head still using the same 1.610˝ exhaust valve. On these we remove the factory guides to allow a full port operation. Oversized intake seats are used to support the intake valve diameter.
Is there an aftermarket for Harley Davidson cylinder heads?
The Harley-Davidson cylinder head aftermarket is broad and deep with offerings from mildly modified stock castings to all-out racing billets. We see the whole range of this market on a daily basis here at GMS. A well maintained seat machining center makes valve seat work quick and accurate.
What makes a good cylinder head for a car?
A cylinder head with great intake airflow numbers but poor exhaust flow will not perform as well as a head with a slightly lower-flowing intake port and excellent exhaust port. With a good-flowing exhaust, you will see good power.
Is it true that open headers burn exhaust valves?
There seems to be a well known idea that running an engine with just open headers or just a collector with no long exhaust will eventually “burn the valves.” The idea is that they warp and then lose enough contact with the head for heat dissipation. I’ve also seen people saying that exhaust leaks can do this also.
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.
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.