Engine head Rebuild: Machining, Valve Job (Marine Diesel Engine)

Hi there, welcome back to Sailing NV. You might remember we're currently stuck in Borneo with engine issues. After taking the head off we found the head was warped and the valves corroded. In this video we machine the head and replace the valves. Back onboard, the engineers, check if the main engine block is also warped. Before evaluating, the burnt old head gasket must be removed using a scraper. A straightedge (often a precision metal bar) is placed across the surface of the engine head. Then, feeler gauges (thin metal strips of different thicknesses) are inserted between the straightedge and the engine head. If the gap between the straightedge and the head varies, it indicates warping. Luckily for us, it was straight, so the damage is confined only to the engine cylinder head. There is a limit to how much re-machining an engine head can tolerate. If you machine too much, the valves may come into contact with the pistons. Here, we find signs of corrosion, likely caused by the broken gasket and faulty heat exchanger. The valve seats were machined, and the valves were replaced. After conducting a compression test, we found that two of the valves didn't hold pressure, so the valve seats needed to be re-machined. Here, they are inserting the new valve guides. It was a long day for everyone, thanks a lot to the team at ES Jesselton engineering 00:00 Intro 00:22 Showing that the head is warped 00:54 Visit to the machine shop 01:21 Showing the valves are corroded and engine bolts are bent 01:54 Showing off Timo's new phone's capabilities 03:27 Back onboard the boat, checking if the engine body is also warped 04:37 Back in the machine shop 04:51 Fiji engine rebuild recap 05:35 Machining the head 08:08 Machining valve seats and replacing the valves -------------------------------------------------------------------------------------------------------- If you'd like to support us on Patreon, our website https://www.patreon.com/SailingNV or with a one-off donation via https://ko-fi.com/sailingnv or paypal https://www.paypal.com/paypalme/sailingnv or if you'd like to help us buy something we need, you can check out our amazon wish list https://www.amazon.com/hz/wishlist/ls/1G2NJ0EGJLKR0?ref_=wl_share -------------------------------------------------------------------------------------------------------- Link to Timo's new BV8200 from Blackview https://s.click.aliexpress.com/e/_oF7FTPJ #boatrepair #boatlife #marineengine