Marko J

Very possible. I didn't inspected collar ever. The only thing I've changed is that bolt. I lost old one during engine rebuilt and push this one in (the same size). Old one did the "job" but this new one is made of hard steel standard (mark 8.8) and making squeaks when loose.

Since I bought the boat, I didnt tried to pull this bolt out. Maybe you're right. Coupling is fixed with 4 other bolts (on the photo) with transmission system.

Problem solved. It was this bolt untightened and making that squeak. That's my bird. I used wrench no. 13 (1/2") to tight. I wonder how to tight that bolt to never loose again? I tried with Victor Reinz dicht (gasket) mass but it not work.

Yeah, probably its Tweety I rebuilt engine last year, changed all interior and exterior parts with original ones..

Tony, many thanks. You gave me few ideas anyway. First I will try with more greasing since I didn't greased that last, rear nipple since I bought a boat three years ago.

I don't know, this is rear section

Its a Dutch steel motorcruiser boat 7.8x2.6 meters. After I greased closest greasing points and degreased air breather, I did some other checks: - Engine mountings are ok - I can turn shaft by hand relatively easy - No leaks - After one hour of boating on 1500 rpms and more, stuffing box, shaft and other parts stays cold - no signs of heating Here are the photos of the system. Stil I wonder what is the purpose of the third greasing point, the one far away from the transmission (its on the top of 1st photo)?

Thanks for fast reply. 1 - It's greased properly, but I think I mistakenly greased air breather too last time. 2 - I will check for engine mounts. In may 2022 I did total engine rebuild. Maybe mount got loose. 3 - Since I didn't had problems with shaft before I must check for gland egg shape too. 4 - Shaft can be turned by hand when engine is off. 5 - I will check for gland drip too.

Hello to everyone. I read all this about strange sound from stuffing box or stern gland and found it's similar like mine problem this days. When engine is powered in gear, and forward, strange harmonized squeak is coming from stuffing box. When going backwards - nothing. When idle, even high revs - nothing. That problem comes with no drips. I didn't inspected heating. Some ideas of what could it be are welcome. Thanks Here is the video I've made. (Don't ask me about bilge, its BMC 1.5 :D)

White smoke can be due to the water leaks into the engine block or condensation in exhaust

First ignition after rebuild and fiting.

Thanks! I was surprised too. How much are general (re-build) repairs in England? I will upload before/after video after I put the boat back into the Danube.

Thanks! I hope not to many can end up with same problems. In the other hand, engine is already very old. This was second rebuilt (service guy opinion after measuring piston holes). Cost was: - 900 eur for the parts (including VAT and customs taxes since I'm in Serbia - outside EU) - 600 eur for the mechanic specialist - Time used for repairs (including waiting for parts): 14 days. I spent all March for boat refurbishment while waiting for the engine. That was pretty successful too.

Thanks for all answers. Engine rebuilt and works like new one now. It was messy inside - especially with bearings, shafts and sealings. Leak of fuel was due to bad workshop on fuel pump by previous specialist.

Thank you @Tony Brooks and @Tracy D'arth. It seems I will spent rest of the winter rebuilding my engine. Does someone know how much money basic rebuild of inner engine components can cost ? Approximately...

After I removed injectors, I found just 3 of 4 heat washers bellow them. After checking injectors, one of them had no completly dead. - I've ordered 4 new nozzles and heat washers from Asap supplies UK. - Specialist rebult them and put them back. Result after first firing: - alot of smoke coming in bursts - better sound than previous - oil pressure when cold 20 psi - oil pressure when warm 10 psi/ oil pressure when idle warm 5psi - high idling revs when warm - smoke coming from oil cap opened So, now, are those are symptoms of warm piston rings or maybe oil pressure valve? (This is a video just a minute after starting)

A diesel man will do the testing. He have all the machines. I just prey and hope that I didnt ruined something else like piston rings during few engine starting with new nozzles and pump. There is a big difference between engine sound, cranking and operating from the first after rebuilt starting and last one. First start after pump rebuilt and with new nozzles: Sound one week later after few cranking (without any sailing):

I see now. Thank you for help. Another opinion came from fuel injection specialist - bad quality nozzles mixed with lack of washers. We will test every nozzle and compression too and see if it is true. He asked me about origin of nozzles and concluded - "oh, I know those, with laser scribed letters on it.... It's pure crap coming from China...probably few are already dead, and engine stalls because of that... quality ones are with engraved text try to find them". I think, this is it: https://www.asap-supplies.com/products/bmc-injector-nozzle-for-bmc1-5-thornycroft-90-engines-12h834-131121

Now I see. I dont have atomizer sealing washer at all. But does this lack of washers can produce problems with engine running?

So how many rings-seals - washers do I need on every injector when attaching to engine block?

For the first time I see this 🤣

The only thing I put below the injector is copper heat shield. Something like flat ring, it's on the picture of injector.

Nozzles are new. There is needle pintle on all of them. Injector holes look all the same to me.

Thanks, it's very helpful! Maybe nozzles are just right after I read this.

I think I got wrong nozzles. They have some kind of protrusion instead of flat head. In that protrusion there are main hole and secondary hole. Today I've checked injectors, and moved slightly fuel pump - it was 1-2 degrees outside of proper position. Results are not so good still. @Tony Brooks Does this nozzles cant be involved in all the problems I noticed after Fuel Injection Pump? Engine after checks and refitting fuel pump>