Despeculator

Ok many thanks - I’ll aim to have a go at it over next month or so and let you know how I get on - really appreciate the advice and feedback - thank you to all 👍

Yes that’s why I changed it, I was expecting little or no change, when it got worse it made me think about timing again. I’ll fit the third pump as it’s a known good entity in theory but if it’s the same I’m resigned to taking the timing chain cover off, not an easy job 😊 Ok there’s no real chain noise at all, only what you’d expect. I think you’re correct, it is same as 2.2 BMC, only the capacity is different

Ok, so I guess if the chain tensioner was not tight that also might have a similar effect - I’ll try the third pump first as I’m trying to not take the cover off unless I have to but it’s looking more and more like it’s necessary - thanks for coming back on this

Fuels good - note I’ve been trying to sort this since 2017 - we took her around UK in 2018 with a dodgy engine 😊 I may be able to get power on board for a hair dryer or similar but I haven’t tried that to date. She will start immediately if you put a whiff of easy start into her but I don’t like using it. If the timing marks were aligned as per a smaller BMC, ie with marks together and not to the chain, would it run and if it did would it appear badly retarded? thanks for coming back on this

Background Engine professionally rebuilt late 2017 On refitting starting problem noticed Engineer stated it was due to needing to be run in appears to have been incorrect Since then New starter motor all injectors repeatedly serviced glow plugs done cylinder off, redone and refitted - by professional compression tested 400 each cylinder lift pump replaced all filters changed again last week, including oil tappets checked fuel line changed to eliminate leaks key switch changed Rotating pump makes little difference although retarding it fully sometimes can allow a start after several minutes cranking The engine has large amounts of white smoke It refuses to start unless warm it was running temperature wise ok oil pressure is slightly low but levels are right plenty of water out of exhaust Last weekend I took off the injector pump I changed it for another unit I also inserted a 6mm dowel and checked pump drive position which is spot on 86 degrees the replacement pump made things much worse more smoke, won’t start and now cuts out, temperature much higher prior it would run fine, just smoking badly and not starting So questions: I think this is a timing issue i have another pump on the way which is the model designated for my Thornycroft 154 and it’s been rebuilt I intend to fit this to get a comparison Is it feasible that the timing marks have been set as per smaller BMC’s, ie marks aligned for crank and cam, would it run? The 2.52 has them aligned to links on the chain. Reason for asking is when I inserted the 6mm dowel for TDC, whilst the pump is aligned, the mark I made for TDC when the head was off appears to be about 120-180 degrees different (I’m guessing hence not being precise). Any other thoughts of what the problem might be appreciated or if anybody is near Cardiff and thinks they might be able to fix it, please yell 😊