Valve seat
Replacment
The valve seat is the surface that the intake and exhaust valves sit on when the valves are closed. The valve seat is a critical component in the combustion process, if the valve is not seating correctly it can cause combustion gasses to leak, reducing compression. As well as this important operation the valve seat also serves to transfer heat away from the valves into the cylinder head.
We can replace these for OEM steel type seats or Beryllium Copper in your cylinder head.
We also have the capabiltly to manufacture valve seats in-house on our Haas CNC lathe
Valve Seat Cutting
Why it's important to cut valve seats?
Correctly seated valves allow the engine to develop good compression. Any compression loss at this point would not just minimise the engines capability to develop power but ultimately could mean it doesn’t run correctly or even at all. The seal created by the valve and it’s seat, allow all the air and fuel that has entered to be ignited and the controlled detonation forces to act upon the pison to provide rotational force, and not allow these expanding gasses to escape through either the exhaust ports or the intake ports, causing damage and wear, not to mention a lack of power.
We also have the ability to cut valve seats in one, three or multiple angles. Three angle valve jobs massively improve flow rates, which as explained above, any increase in flow we will see an increase in power.
Contact the workshop for more info
Cylinder Head Skimming
If an engine has overheated or blown a head gasket the cylinder head can become distorted. If this is the case we are able to resurface or skim the cylinder head to bring it back into tolerance and create the perfect sealing finish.
In modern engines the cylinder head finish should be within 10 microns, this is because most modern engines use a steel laminate head gasket, called a MLS gasket i.e. ‘multi layered shim’. These gaskets provide a stronger body plate and help conduction between block and cylinder head, this helps stabilise thermal expansion and contraction, thus reducing stress.
Since the MLS gasket material is unforgiving, any flaws in the surface finish of the cylinder head can lead to premature gasket failure. In our well equipped workshop we are able to obtain the correct surface finish using our precision equipment and years of experience.
As well as a head becoming distorted it can also become corroded over time which may necessitate a skim. If a gasket has blown it may leave a mark on the surface of the head which may require skimming.
Valve Guide
Replacment
For every inlet and exhaust valve there will be a valve guide fitted into the cylinder head. This valve guide serves to positively locate the valve to the valve seat so it makes proper contact. Guides also serve to conduct heat away from the exhaust / Inlet valve to the cylinder head.
If an engine suffers a catastrophic failure the valve guides can crack due to the valves bending. If this is the case we are able to remove the damaged valve guides and replace them with new guides. If for any reason new valve guides are not available we are able to manufacture guides to suit.
Over time a valve guide can become worn, which can lead to smoking and oil consumption problems. Rather than replacing valve guides we are able to re-sleeve them. What this entails is for us to fit a phosphor bronze guide liner directly into the valve guide. The benefits for re-sleeving valve guides rather than replacing are numerous, but they include durability, as the phosphor bronze guide liner is a harder wearing material. The guides have been shown to outperform cast iron guides in durability, heat conductivity and friction reduction.
We have a huge range of guides in stock , We can also offer these in OEM steel , Bronze , Copper beryllium, Colsibro. Each Guide has a different use and we can help with the choices for your Cylinder Head.
We also custom manufacture valve guides with our Haas ST10 CNC lathe , please ask us for custom guide info.
All guides fitted are Diamond Honed for perfect finish
Please Call the Machine Shop for Valve guide fitting and prices 01225 791182
Aqua Blasting
Vapour Blasting
Aqua blasting is a process of cleaning parts back to their original ‘as new’ finish. Also known as Vapour blasting or Wet blasting. Various media are used to achieve the correct finish to the metal. The media is forced under pressure with hot water to give a silky satin finish which can then be painted, laquered or left bare. An anti corrosion additive is also included to help prevent studs, etc. from rusting after cleaning.
This process is not as harsh as dry blasting so can be used on delicate items such as carburettors. Aqua blasting is suitable for all non ferrous metals including aluminium, magnesium, titanium, brass, copper and stainless steel. Here at Performance Head Engineering we offer a multi stage process. Parts are firstly placed in the hot wash cleaning machine to thoroughly clean and degrease before secondly chemically removing any paint or laquer. The parts are then vapour blasted before having a final rinse clean and dry.
We have the best machine Vixen 915
Damaged
Combustion
Chamber Welding
We can Weld and machine a damaged combustion chamber and install new valve seats to save your cylinder head from the skip! Please email images for a quotaion
Haas ST10 CNC
Lathe
CNC Lathe Turning Service
If you need a high-quality, precision CNC turned parts manufacturer, look no further than MXZONE. We can handle any size project and can produce all manner of turned parts and components from metal and plastic material to your exact specifications. From small runs through to large-scale production, you can rely on us for all your sub-contract CNC turning requirements
Contact us direct for all inquiries
Get in touch
Telephone: 01225791182
E-mail: sales@performanceheadengineering.co.uk
Address: Unit 21 , Intercity Trading Est , Melksham , Wiltshire SN128DE