JohnNinety
New Member
- Posts
- 2
Hello everyone,
My first post. Just become a 1986 Ninety Owner in the last month and have been working on the 200tdi engine that has been a replacement for the petrol original. Had some "black smoke" on startup but engine very willing and keen to get going. Some oil in injectors and glowplugs so did compression test (via glowplugs) and had pressures of 370-430 on a cold engine. This seemed reassuring (is it?). Took off cylinder head and when cleaning noticed that the combustion bowl/piston bowl on one piston was smoothly eroded. It's smooth like a pebble on a beach. In the photos its about at the 12 o'clock to 2 o'clock position. I don't have any technical knowledge so what does this mean? Is it a replacement situation? Obviously the volume of the "bowl" is slightly changed and not symmetrical. Just for information the head had cracks between valves on 2 pistons (including the one with the deformed bowl) and between the glow plug and the injector. I think I know that means I need a new head. But what do you make of the piston? Can I get by for a while without having to remove the engine? Any thoughts very welcome.
My first post. Just become a 1986 Ninety Owner in the last month and have been working on the 200tdi engine that has been a replacement for the petrol original. Had some "black smoke" on startup but engine very willing and keen to get going. Some oil in injectors and glowplugs so did compression test (via glowplugs) and had pressures of 370-430 on a cold engine. This seemed reassuring (is it?). Took off cylinder head and when cleaning noticed that the combustion bowl/piston bowl on one piston was smoothly eroded. It's smooth like a pebble on a beach. In the photos its about at the 12 o'clock to 2 o'clock position. I don't have any technical knowledge so what does this mean? Is it a replacement situation? Obviously the volume of the "bowl" is slightly changed and not symmetrical. Just for information the head had cracks between valves on 2 pistons (including the one with the deformed bowl) and between the glow plug and the injector. I think I know that means I need a new head. But what do you make of the piston? Can I get by for a while without having to remove the engine? Any thoughts very welcome.