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Old 03-06-2022, 17:45   #1
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What would you do with a (pretty) good running 29 Year old Diesel?

Hey all, how's it going!

I just sailed down from Portland to the SF Bay. Long story short, despite bringing tons of fuel filters, my fuel line clogged and I had to run my 4JH2e out of a jerry can!

Anyway, other than that she motored for probably 70, 80+ hours fantastically (other than being lumpy when cold).

But stories aside...if you had an engine that ran pretty/totally well, 29 years old, what would you do to make it last as long as possible?

3400 hours. Regular Oil changes, Regular fuel cleaner treatment, seafoam treatment (helped cold startup a little bit), new fuel lines , new hoses, coolant flush are all on tap. Mixing elbow, heat exchanger look pristine. Engine mounts have hardly any rust. Anything else that you'd suggest? Head gasket? Don't touch anything?
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Old 03-06-2022, 18:00   #2
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pirate Re: What would you do with a (pretty) good running 29 Year old Diesel?

If it ain't broke don't fix it..
I'd get your fuel tank sorted out though were I you.
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Old 03-06-2022, 18:12   #3
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

Agree, need to clean the fuel tanks and polish the fuel.
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Old 03-06-2022, 18:48   #4
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

Above posts nailed it.
Also, some incantations spoken in a reverent tone never hurts.
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Old 03-06-2022, 18:52   #5
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

I've got 2 yanmar engines that are 30 years old. They are currently sitting on the mechanics bench. I had to pull them to change the mounts and shaft seals(v-drive) so might as well give them a clean up and tune up, and repaint. They have over 8000 hours and are still running strong.
If it's running well I would keep it. Give it some love and it will look after you.
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Old 03-06-2022, 19:02   #6
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

Keep up regular maintenance.
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Old 03-06-2022, 19:02   #7
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

Give HER a kiss !
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Old 03-06-2022, 19:03   #8
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

Quote:
Originally Posted by chris mac View Post
I've got 2 yanmar engines that are 30 years old. They are currently sitting on the mechanics bench. I had to pull them to change the mounts and shaft seals(v-drive) so might as well give them a clean up and tune up, and repaint. They have over 8000 hours and are still running strong.
If it's running well I would keep it. Give it some love and it will look after you.
7000 hours on my Yanmar, thirty years old, love this engine !
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Old 03-06-2022, 19:10   #9
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

I support your plan as well. However, when/if parts get scarce, there will come a time to get creative.

Your engine should give you at least 10,000 hrs. of service, perhaps more. We new a guy with a 50 yr. old Gardiner diesel with 24,000 hrs. on it. He wrote to them and asked what service was recommended, and they wrote back, "None. It's just run in."

Obviously, oil changes at the proper interval help, and you do need to sort the fuel problem, but that's nothing to do with the engine, and everything (as you know) to routine maintenance.



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Old 03-06-2022, 19:11   #10
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

If the engine checks out healthy, parts are available and you're not having trouble keeping it running well, I'd just keep maintaining and using it. Only reason I'd worry about a repower is if you came up with a good reason to put in a significantly different engine.
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Old 03-06-2022, 21:03   #11
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

Give it clean fuel. change the oil religiously, flush the cooling system every few years and don't forget to change the transmission fluid/oil per manufacturers specs.

Inspect the raw water impeller every year and replace it at the first sign of cracking or wear. Same for fan belt(s) and while the fan belt is off check for play in the fresh water pump bearings.
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Old 03-06-2022, 22:08   #12
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

Lumpy when cold? Bad like white smoke at same time or no?
If you wanted to give it a birthday change the anodes, thermostat, clean/check the heat exchanger and check the valve clearances…
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Old 03-06-2022, 23:45   #13
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

Ya, I concur with Phil, check the valve clearance. I just bought a 35 year old boat with the mighty 4JH2E probably 8000+ hours by my calculation (not the hour meter reading). The PO just put in new injectors. We motored hard into heavy seas and winds for 3 days and she never skipped a beat and used no oil. So if I was you, I would at the very least send your injectors to the local diesel injector spa for a day of cleaning and pampering but only if she smokes. Attention to the raw water impeller is very important, overheating is never a good thing. The blue self lubricating impellers (Globe Marine run-dry impeller) are worth the extra investment for such a critical piece of equipment. If your impeller fails you're dead in the water unless the wind blows from the right direction.
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Old 04-06-2022, 02:07   #14
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

Simple: for heavens sake keep this treasure
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Old 04-06-2022, 02:20   #15
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Re: What would you do with a (pretty) good running 29 Year old Diesel?

Adjust the valves if not done so in 200 hours. Run diesel injection purge like Liqui Moly 2005 or pull injectors and have them rebuilt. Or buy one and send out individually. Change oils and do all service at manufacturer's recommended intervals. Clean and polish fuel and actually look inside the fuel tank for gunk. Otherwise don't fix what ain't broke. Worry when you get closer to 10000 hours.
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