BMW Cylinder Head Resurfacing

A 6-cyl high performance BMW cylinder head being resurfaced on the Sunnen HBS-1300 to correct a warp condition and surface finish measurement with a profilometer by John Edwards @ Costa Mesa R&D Automotive Machine, (949) 631-6376 www.engine-machining.com

Category:

Autos & Vehicles

Tags:

• BMW
• performance
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• resurface
• resurfacing
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[mckinzi1]

love all the machines. folks don't understand the investment a shop like your's has in equipment from the machine tools to the various testers we had a numbered drill index at our shop and we thought we were high tech  (G) lawnmower guy in texas who just bought a dozen new #78 bits for lawnboy pilot jets they don't give that stuff away

[fiatnutz]

@mckinzi1 - Yeah, the tools are expensive - the profilometer is right at $2000, and the resurfacer in in the $24,000 range. People wonder why we charge for something that they think should be so cheep. Let them drag it behind their car on a rope, that should be cheep enough - Ha..... Oh, I didn't mention the ability and experience to run the machine, did I?

[bvanderheijden1]

Hi John, excellent craftsmanship you're displaying. not only on the workbench, they way you present the knowledge is awesome as well! thumbs up!

I have a question about the cryogenic treatment you gave some parts in another movie. When you use the hardening treatment, do you machine the parts before, or after the cryogenic hardening, cause im thinking of the shrinkage that will occur after treatment, and its harder to machine etc.. got any good advice on how to approach this! apreciate it.

[fiatnutz]

@bvanderheijden1 - Cryo first, then machine.

[answerseven]

Hey John, great video! I'm just curious about something. If the center of the cylinder head kept getting missed by the cutter, doesn't that mean that the head was bowed in a little? If that were the case, wouldn't the head need to be straightened?

[fiatnutz]

@answerseven - Yes, if its over .006"-.008"

[C1Destroyer]

thats a really nice finish

[fiatnutz]

@ueoaoeu - I have written several books and articles on the subject, plus I was in the classroom for 15 years. I currently write for Sand Sports Magazine and occasionally for Hot VW's. Plus, I do these Tube videos. I'm passing on my knowlege worldwide. Thanks for the kind words. JE...

[ZukefliJohan]

@fiatnutz Yes cars are very high tech these days and as result the test and repair machines plus skill level must also be high.

One my wife friends had her BMW break down, unauthorised repair shop used for all services and repair, she asked me if BMW would help her sue them, haha, I told her she was advised to use only authorised BMW service center and had no recourse, turns out some of her replaced parts were more expensive than original BMW parts hahaha her husband was angry with her

[iamcocro1123]

@HelloPeridol stupidity

[skwurlking82]

thanks for sharing the video, very informative and didn't miss anything!

[azrios]

Nice video:

FYI: Checking for a warped cylinder head starts with the camshaft bore, NOT the flat portion first. If the cam bore is warped you just wasted your time surfacing the cylinderhead. Heat straighten first to align the cam-bore then surface the flat surface.

~ Rico - ASE Master Machinist

[idusclothing]

Do you resurface the head with all the components inside?

Valves, springs, ect...?

[HelloPeridol]

who on earth would dislike this and why?