Veicomer - BMW M5 V8 E39 - Aplication Darton Sleeves 

my only guess is they probed an oem cylinder bores all along the stroke , and copied it to the new sleeves ....

The main thing to know is the billing.

Cronus577 - I thought that was the liquid from a glow stick lol

Probably proprietary. Everybody knows what decking, boring and honing look like lol.

jmayor88 pressing in a sleeve isn’t proprietary....

They are not pressed in...Surprise...!!

EnglishTurbines they are pressed in noob.

@@msengineeringdavid3702 A noob might press them in...You got that right at least.

how would you ship a cylinder head from USA to Portugal? that would be very expensive and difficult

The sleeves have flats on the Flanges....I imagine they warm the Block up to make the bores expand or use liquid nitrogen to shrink fit the sleeves. You need time to line up the flats on two sleeves at once to get a pair to fit together. They didn't show this part because they think they are Masters and nobody else knows how its done, Bless em.

EnglishTurbines yup, called an interference fit. Same as aerospace...may have heated block and used nitro both.

more strength and @ bigger bore...

...and why no timing cover installed when decking?

Probably when adding sleeves, its not required. The sleeves can be made to order with whatever size you want then just honed.

So many fake experts here.

@@msengineeringdavid3702 Except I sleeve S62's. Timing cover is required as the head gasket lays across the cover, difference in height would be a definite leak. The deck and heads needs a modification to prevent leakage under the gasket to the sleeve flanges. Torque plate distorts the sleeves about .0015" when installed. I use liquid nitrogen to install.

The whole Block is made of Alusil, you can't go underneath.

@@H2MotorsGmbH what I ment was the first cut was to get under the bore coating,

@@aussi3212 there is no surface "coating" with Alusil. The entire block is Alusil alloy. The bore is etched at factory to remove a layer of aluminium leaving the silicon as a slick surface layer for the rings to operate on. Prior to the S62 motor, BMW had stopped using the Nikasil process (in about 1995) due to the debacle resulting from the high sulphur content in fuel in some markets (US, UK, etc.).

@@francispowell1811 okay the first cut its deep enough to get under the very hard silicon precipitate due to etching of the bore.

@@aussi3212 No, the silicon is throughout the block. I sleeve these blocks also and can simply bore oversize to re-use the original block material instead of sleeving. The silicon exposure is a last step in the honing process. I will say that alusil material is rough on inserts.

they dont know that , they are juts idiots with cnc machines, thye dont know shit about engines, if they thik they need to bore nicasil they will do it. THAST WHY THERE ARE SO COMPLAINS ABOUT THIS VEICOMER COMPANY.

and that is true, after bore block will lose stranght, and u even not reach 200,000 km

Not really, an properly sleeved S62 engine can handle more power than the original. When you'll see an 700+hp S62 engine it's probably sleeved.

portugal