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Old 09-23-2018, 02:30 AM   #1
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3208T 260HP Engine rattle BAD!

Following a great 200 plus hour tour to North Queensland thru the Whitsundays on our liveaboard Mono Lyscrest 42 from Brisbane we finally got home again after a year with relatively no problems. Even did a complete service on both engines prior to departing Magnetic Island off Townsville. Two weeks after getting home decided to run the engines on the dock when I heard a very load clacking sound coming from Stb engine (and it didn't sound as it was running on all cylinders) on lifting the hatch to determine which engine it was I immediately shut down. Diesel Mechanic was called and he also didn't like what he heard and also shut it down. He thought it maybe water in fuel as there was evidence of this which had effected the genset which would not start. Proceeded to do a fuel clean dialysis, changed all filters and cleaned out injector lines etc (got lots of fine brown crap out) When all done started genset and it ran OK. Started Engine and still had this broken noise. Have since lifted tappet covers and all rods etc seem OK nothing broken or loose. On turning engine over without starting her you can hear a shoosing sound and some knocking noise it appears from further inside. He is about to do a compression test and run a camera down to each cylinder to see what gives, sometime in next couple of weeks. Looks like my insurance and pocket are about to be hit big time....any ideas or words of sympathy for this broke boater old pensioner!
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Old 09-23-2018, 03:35 AM   #2
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The shoosing sound is probably air going past the rings. Internal noise could be several things. Engines that are running fine and make noise at the next startup usually have a fuel or injector problem. At idle a bad injector can sound remarkably like a broken rod.
One thing you could do is swap the injectors between the two engines.
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Old 09-23-2018, 03:57 AM   #3
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Firstly, welcome aboard! Always good to add more Aussies to this forum.

With luck it will turn out to be an injector problem. Good luck with getting it sorted!
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Old 09-23-2018, 05:18 AM   #4
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A partially failed damper plate for the tranny can make many strange noises.
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Old 09-23-2018, 05:56 AM   #5
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Check your valve clearances, it may be a bent or stuck valve.
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Old 09-23-2018, 05:34 PM   #6
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The whooshing noise would have my attention, that does not sound like injector. Frequent 3208 weakness is head gaskets. Id take another look at the valve train and as suggested look for a sticking valve. I pulled off one of my heads myself this past winter, just myself. Ran an I beam through the salon to help with the heavy objects and no helper. This is a simple engine, whatever it is, it can likely be fixed.
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Old 09-24-2018, 01:49 AM   #7
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You were right

Mechanic did compression test on Stb engine and found no compression on number one cylinder however after tapping down on valves found some compression> Looks like we have a valve problem on number one. Following up with a camera showed nothing wrong with top of piston. All others cylinders shape up OK with good compression. May have dodged a bullet here. Injectors sent off for testing and for clean & repair if required. Head to come off in a week or so, only on the one side as Stb side would be a bugger with no room to work in this engine room. Will update everyone interested as we go. Thanks for your help everyone. Robin
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Old 09-24-2018, 02:44 AM   #8
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Welcome Aboard! Glad your problem is turning out less serious than it might have been.
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Old 09-24-2018, 03:13 AM   #9
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Welcome.
Who did you end up getting to work on her if you don't mind me asking?
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Old 09-24-2018, 05:36 AM   #10
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Sometimes a "valve problem" is just carbon buildup that keeps it from sealing.

An attempt before disassembly cold be to use a "flit" gun ) a pump sprayer for bugs as use 50 years ago) to spray water into the intake.

This causes steam in the cylinders that loosens carbon quite well. Spray rapidly enough to caise missing , but not stalling at about 1100RPM.

Outboards have a chemical they use that might also work.

Pulling the head for a real top overhaul is of course best , but best done in the off season.
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Old 09-24-2018, 02:58 PM   #11
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Quote:
Originally Posted by FF View Post

Pulling the head for a real top overhaul is of course best , but best done in the off season.
We're in Queensland
There is no off season.
Beautiful one day perfect the next
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Old 09-24-2018, 07:20 PM   #12
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Hi Mate, We use Franz from Aquasure Marine Victoria Point.
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