What is resurfacing cylinder head?
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What is resurfacing cylinder head?
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.
Should I get heads resurfaced?
The deck surface on the head or block may need to be resurfaced if the surface isn’t smooth or flat. A head may need to be resurfaced after welds or other repairs have been made, or milled to increase the compression ratio.
How do I know if my head needs resurfacing?
The only way to tell definitively whether your cylinder heads need to be resurfaced is by measuring them. The cheapest way to measure it is with a comparator gauge. This simple tool has sample patches etched into a metal plate which indicate the different surface finish ranges.
When should engine heads be resurfaced?
A head may need to be resurfaced after welds or other repairs have been made, or milled to increase the compression ratio. Cylinder heads and blocks may need to be resurfaced to restore flatness or to improve the surface finish, or milled to change the deck height for a variety of reasons.
Do all cylinder heads need to be resurfaced?
Resurfacing the cylinder head restores it to its original tolerance and creates a perfect seal. In addition to resurfacing after an engine has suffered some damage, we recommend resurfacing when you’re restoring an engine and installing OEM (original equipment manufacturer) cylinders.
Can cracked cylinder heads be repaired?
Repairing a cracked cylinder head always involves a certain amount of risk, but when done properly is usually much less expensive than replacing a cracked head with a new or used casting. Most small cracks in cast iron as well as aluminum heads can be repaired by pinning.
Is it necessary to resurface a cylinder head?
Cylinder heads and blocks may need to be resurfaced to restore flatness or to improve the surface finish, or milled to change the deck height for a variety of reasons. The deck surface on the head or block may need to be resurfaced if the surface isn’t smooth or flat.
How smooth should a cylinder head be?
Roughness Average (Ra) is the average micro-inch measurement of peak-to-valley roughness height of a flat surface. The lower the Ra number, the smoother the surface. Fel-Pro recommends a finish of 60 to 80 Ra for cast iron cylinder heads and blocks and 50 to 60 Ra for aluminum.
