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Old 08-24-2018, 07:45 PM   #1
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Perkins Diesel has a very loud banging sound

So bummed! Our worst fears may have just happened. There were metals detected in the fluid survey, we hoped for the best and have had one season of pure joy with her.
Today when we started the port engine a very loud banging, sounded like a metal fan hitting something over and over.
Looking at videos hoping we can fix her ourselves.
Sour puss. Darn it! Sad sad day
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Old 08-24-2018, 08:15 PM   #2
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hoping we can fix her ourselves.
Attachment 80077
You can if you're a mechanic.
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Old 08-24-2018, 08:23 PM   #3
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You can if you're a mechanic.


We have done extensive mechanical work on our gas engines
Diesel is new for us.
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Old 08-24-2018, 08:47 PM   #4
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Not likely that you can fix from what you describe.
Make sure key is off, better yet, disconnect the battery and slowly turn the engine over with a wrench. Listen for the crunch sound and stop immediately.
That being said, now remove the head, this is a job for a mechanic. period.


Been there, done that.


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Old 08-24-2018, 09:24 PM   #5
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We have done extensive mechanical work on our gas engines
Diesel is new for us.
Accept for the fuel system, it's the same as gas only bigger and heaver. Sounds like a rod. Not insurmountable. Buy a service manual, maybe on ebay.
Another option is a short block.
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Old 08-24-2018, 09:36 PM   #6
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Trans Atlantic Diesel in VA specialize in Perkins. Marcus, the owner, has always been there for me with good advice and parts I have needed for my older 6.354 engines. Give them a call.
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Old 08-25-2018, 05:50 AM   #7
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There is a complete 6-354 for sale in the classifieds here on this forum. Hopefully you won't need another engine but just an FYI option.
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Old 08-25-2018, 06:25 AM   #8
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Talk to your local Massey-Ferguson farm tractor dealer. Reman. Watch the video. It talks about reman engines. Fortunately all parts are still available for Perkins 6.354 engines.
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Old 08-25-2018, 07:09 AM   #9
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Post a video of the noise.
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Old 08-25-2018, 07:41 AM   #10
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Not likely that you can fix from what you describe.
Make sure key is off, better yet, disconnect the battery and slowly turn the engine over with a wrench. Listen for the crunch sound and stop immediately.
That being said, now remove the head, this is a job for a mechanic. period.


Been there, done that.


CCC


The biggest challenge is working on it while in the boat.
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Old 08-25-2018, 07:48 AM   #11
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It could be a failed damper. Spring pops out and is stuck between the damper plate and block. Relative easy fix if you can slide the transmission back six inches.
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Old 08-25-2018, 07:50 AM   #12
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It could be a failed damper. Spring pops out and is stuck between the damper plate and block. Relative easy fix if you can slide the transmission back six inches.


Thank you
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Old 08-25-2018, 09:17 AM   #13
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Would not expect a rod/piston/bearing failure if engine was ok when shut down, then a bad noise on next start. I too would be looking at things like damper plate, etc.

Might check valve gear under the rocker cover. Could be a sticky valve.

Audio of the noise can be very helpful.
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Old 08-25-2018, 09:20 AM   #14
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Ill send the audio
Thank you so much !
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Old 08-25-2018, 10:25 AM   #15
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We shut it down immediately after hearing it. Possibly 10 seconds and then I had my wife start it while I was at the engine. I am reaching out to a local diesel mechanic who I hope will be able to give it a listen and well record audio. Well send you a copy and would appreciate your opinion as well. Gonna try taking it out with just the 1 engine with the inoperable Drive in neutral. We have velvet drives. Should be okay to do so? Will be running slow, 5-6kts.
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Old 08-25-2018, 08:55 PM   #16
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Yes velvet drives are ok to allow to freewheel at low speeds.

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Old 08-26-2018, 03:31 PM   #17
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Quote:
Originally Posted by Ski in NC View Post
Would not expect a rod/piston/bearing failure if engine was ok when shut down, then a bad noise on next start. I too would be looking at things like damper plate, etc.

Might check valve gear under the rocker cover. Could be a sticky valve.

Audio of the noise can be very helpful.


Waiting for a few mechanics to take a listen before we run her again .
Not all is lost, we now have a name on her/him Click image for larger version

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Old 08-31-2018, 01:57 PM   #18
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Do a search on here and the Internet. Perkins 6.354 manuals are not hard to find. I think 1 is on here. Tractor or boat are the same internals. And you can use the same manuals to a point.
Find a cheap stethoscope (Harbor Freight maybe) isolate the noise. If there were metals in the fluids and banging I'd go with a crank or rod bearing. Piece of wood against the block and up to ear will work too. Don't run it a lot. You don't want to mess up the crank.
Rebuild kits are available. Sleeves, pistons, rods, bearings..
Now the bad... Almost a pull the engine job to rebuild. No way to get to the crank if it's a bearing. At the very least lift the engine and work on it. Under it...
Plus all the stuff you have to take off to do it. And a twin, less room...I'd pull the engine myself. So much easier to work on and do it right that way...
Or pull and replace with a rebuilt one. Keep that old one and rebuild it for when the other one goes.....
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Old 09-01-2018, 12:00 AM   #19
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Hopefully your diagnosis proves favorable however, in the event of a big end rod bearing failure (or any other catastrophic failure), I'd pull er out for a proper rebuild. You want to get all the metal floaties out of oil galleries and clean any scale out of coolant passages as well. Old school hot tanks are going the way of the dinosaur but jet blast cabinets, soda blasting and baking blocks and heads will render same results. Good luck
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Old 09-01-2018, 06:44 AM   #20
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What metals were detected in the oil sampling? In this engine with trouble or the transmission? I'm sure you gave this a lot of thought already, I'm just curious.
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