Barnes Auto Engineering
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Barnes Auto Engineering is a privately owned, established business, located at Four Crosses Industrial Estate, Menai Bridge on the Isle of Anglesey, North Wales. We are focused on providing a top quality service with the highest levels of customer satisfaction for you and we will do everything we can to meet your requirements.

With a variety of engine work undertaken in house that range from cylinder head repairs/restorations for modern, classic, marine and agricultural engines, to full engine rebuilds for your classic restoration project or providing improved performance for the racing/rally enthusiast.Our premises house a wide range of facilities that are required to provide the services we support.If you are looking for a head skim to a full engine rebuild please contact us, we are happy to discuss your needs.
Services
At Barnes Auto Engineering we cater for all aspects of modern cylinder head repair, whether head gasket or cam belt failure.
Cylinder head resurfacing, pressure testing, valve seats recut, valve guides supplied and fitted.
Broken glow plug removal, broken bolt removal.
All sizes of solid thread repair insets supplied and fitted including spark plug sizes.
We also supply gaskets, valves and guides, camshafts and followers.
For your engine block, we offer a reboring and honing service, pistons, piston rings and engine bearings supplied.
We undertake in resurfacing (skimming) both aluminium and cast iron cylinder heads, from cars, vans, tractors, plant machinery, boats and many more, to a high standard, removing the equivalent to less than a hair strand thickness to return the flat surface needed.
It is advisable to have your head skimmed after a head gasket failure.
When your vehicle has suffered with a blown head gasket, the cylinder head can become distorted and leave marks from where the gasket was blowing, if the head is replaced after distortion isn't corrected, it is highly likely that the head gasket may blow again.
A noticeable loss in engine power may be the first symptom you may notice, if there is a crack in your cylinder head.
A loss of compression, when air and fuel are escaping from the cylinder head, is a good indication there is something wrong.
You will notice that you can't travel as fast, the engine runs slower and it may sound 'rough' or it may stop.
This is because the air/fuel mixture is not contained in the combustion chamber, cause its escaped, so it can't be ignited to keep your engine running.
If your engine has been overheating it can distort the valve seats from constant expansion and contraction, hot and cold.
The valve seat can then distort, therefore the valve can not seal correctly.
This leads to loss of performance due to the compression in the cylinder leaking past the badly seated valve.
If a valve seat has distorted by two thousands of an inch or more the valve simply will not seal.
Valve seat cutting is done in many different ways, from lapping valves in with a valve lapping tool to using machinery, but by far the best is using a carbide bladed cutter on an 'air float' valve seat and guide machine.
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