1930's Rolls-Royce Cylinder Head Resurfacing

See how John Edwards @ Costa Mesa R&D Automotive Machine resurfaces an early 1930's Rolls-Royce cylinder head on the Sunnen HBS-1300 resurfacing machine using a PCD cutter. (949) 631-6376 Be sure to 'Click' and SUBSCRIBE.

Category:

Autos & Vehicles

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• Royce
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• 1930
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• tr2
• tr3
• tr4
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• tr8
• engine
• rebuilding
• machine
• work
• costa
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• r&d
• automotive
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• top
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• drophead
• coupe

[1hdsquad]

Great video, John :) I've got two quick questions:

a) Wasn't the head hanging through by it's own weight and the force of the resurfacer? I would have wanted to support it in the middle, seems like it is not necessary?

b) I wonder how exactly the measurement tool works, could you tell me how you call this peace of equipment so I can google its inner workings?

Thanks in advance :)

[fiatnutz]

@1hdsquad - a) This head was over 6" thick and is a very complex casting and does not require support. The welding of the corrosion damage is to blame for the excessive warpage. b) As stated, the gage measures five sections .030" long. See the Mitutoyo website for additional information. There are about 10 parameters that can be measured, the SJ-210 can measure Ra and Rz.

[P8NTBALL60]

V12 or 6cyl inline?

[fiatnutz]

@P8NTBALL60 - Inline six.

[volodymyrm1]

@fiatnutz hey John isn't this one an airplane engine cylinder head?

[fiatnutz]

@volodymyrm1 - No, it's a car engine.

[hondannyboy]

I wish there was a machine shop with this kind of labor quality in my country.

Awesome work!

[fiatnutz]

@VMATT500C - This is a twin-plug head and you want to keep as much of the combustion gasses as close to the flame front as possible. Kinda cool, this design.

[mikldude]

@macspud28 ok , cheers mate.

[macspud28]

@macspud28 Later they got a reply "well done you got us this time" with this kind of competition a lot of breakthroughs were made.

[macspud28]

@macspud28 I remember a story of my fathers from the sixties where an American company sent a sample drill bit over here with lots of fan fare about how it was the smallest bit ever made. It was duly sent back. A few weeks later there was a letter saying come on where's the credit for our amazing feat, at the a reply was sent back "look closer at your drill bit" what they'd been done was drill through the centre of the bit and sent it back without a note.

[macspud28]

@mikldude The British manufacturers were having success with alloys way before the US in fact US manufacturers had a lot of help from the Brits in this field. Different technologies were were swopped back and forth between the two countries over the years. Lots of competition but also sharing.

[chuckwin100]

I was wondering if it was an option to try and straighten the head with heat as you have done in the past.

[Kurisuchianu89]

@Kurisuchianu89 And forgot to add this: How is it measured? And how much is one Ra in a common metric unit?

[Kurisuchianu89]

Thanks for the great videos john! I have a question though. What is this Ra you are measuring? Is it basicly a measurement of the surface finish? Thanks in advance!

[krollalfa2]

i wish i could work for you

[compucar03]

@1hdsquad If the head was deflecting he would get a surface finish of 1000+. Certainly not 18.1 which is damn good. John you should bill that customer for a new PCD insert since his tungsten dribbles probably chipped it! The tool to measure the RMS surface finish is called a profilometer.

[KEEPINITRIL]

Would an aged engine like this hold up ok to an increased compression of the original 4:1 to say, 7 or 8:1?

and I think I have an insert you should try, rcmw 12 04,

when we go to Westec we gotta bug Sandvik and Kennametal and Walter