BMW E30 M20B25 Engine Rebuild Restoration - The Machine Shop | Part 8

Check out AutoDoc at the links below! https://www.autodoc.co.uk/?utm_source=youtube&utm_medium=referral&utm_campaign=RestoreItt https://interstitials.onelink.me/1036709825?pid=YouTube&c=RestoreItt https://www.youtube.com/channel/UCKt9AEjnQYwR0vTvLJTAvgg In this episode, I finally show you the work that's been carried out at Rectidama. A great engine machine shop close to me. https://rectidama.es. Firstly the head is completely dismantled. It's then ultrasonically cleaned in preparation for a pressure test, which it thankfully passed. The block was then skimmed and it's cylinders polished. All of the parts that needed to be put back in were also ultrasonically cleaned. A small repair on the head was necessary as the coolant, and probably water mix had eroded away some of the coolant channel. The head was then skimmed again and the new rocker arms, valves, springs, eccentrics, seals, bearings and the rest of it was put, in the same way, they came out. The new piston rings were then fitted to the clean pistons, ready to go in after the new bearing shells and crankshaft were also fitted. The pistons and connecting rods were then attached and tightened down to the correct specification. Finally, the valves were adjusted to 0.25 to complete the job. Visit https://rectidama.es for any and all engine work you need in Spain. They serve all of Spain. I cannot wait to get this engine going for the first time. However, the engine I will be putting back into the touring will be the coupe's old engine. Overhauled a while ago, but in good condition. This engine will have to wait for the coupe to be pretty much finished before it goes in. #BMW #engine #restoration Need a quality source for industry-leading repair manuals, instantly downloadable to any PC, tablet or mobile phone? Check my trusted partners at emanuals.com. With subscription access to their library of over 5 million manuals, enjoy 24/7 anytime access to all the manuals you need. Click here for your own 3-day free trial: https://www.awin1.com/cread.php?awinmid=114906&awinaffid=2826808&campaign=aa585b02-6da3-422a-1bb7-08dac0dee4f2&clickref=RestoreIt&ued=https%3A%2F%2Fwww.emanuals.com%2F Tools & equipment used: Quartz Lacquer - https://goo.gl/8PTVKM Base Coat Paint - https://goo.gl/mWhufG Rust Remover - https://goo.gl/13gopW Fast Mover 1kW Infrared Paint Dryer, Stand, Timer - https://bit.ly/2WYR9jJ Workbenches - https://arborgardensolutions.co.uk Moldex Full Face Mask - https://goo.gl/NNYGrv FGL 5 Spray gun - https://goo.gl/Acg5rd A.N.I. R150-T Mini Spray gun - https://goo.gl/cHTJS2 Colad Washable Overalls - https://goo.gl/3Css9E Colad Mixing Cups - https://goo.gl/8DYmE8 Colad TurboMix Sticks - https://goo.gl/cYZfks Colad Synthetic Paint Strainers - https://goo.gl/H79ZgL Steel wire bits - http://geni.us/keyaD Blasting Cabinet - https://bit.ly/2GxvKJ7 Blasting pot - https://bit.ly/32TMnrU Cordless Ratchet - https://bit.ly/30YNlkG Parts Washer - https://bit.ly/2K5G9wA Rotary Tool - http://geni.us/HGed Concentrate Degreaser - http://geni.us/yUn9 Mannesmann Socket Set - http://geni.us/HCDZ Time Stamps: 00:00 – Intro information 00:03 – Showing the block and cylinder head at the start 00:10 – Rectidama.es 00:30 – Removing the rocker arms and shafts from the cylinder head 00:58 – Sponsor - AutoDoc 03:19 – Removing the camshaft 03:32 – Removing the valve springs and collects 04:25 – Removing the valves 04:47 – Ultrasonically cleaning the head and camshaft 04:54 – Pressure testing the cylinder head 06:38 – Polishing the piston cylinders 07:19 – Skimming the block 08:09 – Ultrasonically cleaning the crankshaft and pistons 08:17 – Removing the valve guides 08:31 – Repairing the eroded coolant passage 09:08 – Adding the new piston rings 09:50 – The block after a paint job and a bottom skim 09:52 – Adding the new bearing shells 10:08 – Installing the crankshaft 10:20 – Installing the new main bearing caps 11:24 – Installing the pistons 12:10 – installing the connecting rods with new caps and bolts 13:32 – Torquing down the connecting rods 13:55 – Re-tapping the head to block threads 14:16 – Skimming the cylinder head 14:47 – Everything installed into the head and time to adjust the valves 15:00 – Showing everything laid out ready to be assembled (sorry for the bad quality)

Added 18 Sept 2026