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Old 25-12-2008, 17:29   #1
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Exhaust Ford Lehman

I have noticed a very small amount of a slick off the diesel exhaust upon start up. Everything seems to be normal, water output, small amount of smoke. Has anyone experienced anything like this before? It tends to disappear once good and warm. Thanks

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Old 25-12-2008, 18:25   #2
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We have the Ford Lehman also and this is pretty typical with that engine.

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Old 25-12-2008, 20:19   #3
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Very normal with that engine when cold to see sheen on the water. It should go away when the engine is hot though. Those engines seem pretty dependable and long lasting. When we were looking for our boat they were on our "would take" list.
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Old 26-12-2008, 11:05   #4
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Ford Engines are big pieces of cast iron.....Just like Detroits.....they take a little time to warm up and the smoke/sheen should go away.

If, and I say if, it persists you may want to have the injector nozzles serviced......

But a small sheen is nothing to worry about at this point
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Old 26-12-2008, 12:07   #5
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I agree with all of the above.

My '80 Passport 45 had a 88HP Ford Lehman and it did that from the day that I bought it until I sold it 10 years and 4800 hrs later. I had the injectors serviced a couple time during that period and nothing changed.

That is one strong, solid, dependable, economical engine. The only thing I ever replaced on that engine were heat exchangers and the exhaust manifold elbow.
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Old 26-12-2008, 13:22   #6
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I am going to throw one at you. I have twin Ford Daganheim Lehman Diesel 6 cyl engines in my GB. It has over 3000 hours and I was using Delo 40W straight weight just like all the diesel guys here did. When I started it smoked big and lots of sheen on the water. I could go about 50 hrs before it really started using oil and I would add at least a gallon or more per engine before the 100 Hr oil change.

Then I decided to go synthetic because everything I own since 1977 I use Mobil 1 synthetic. Everybody said "you can't put synthetic in an old engine" and I said why not?

Bought Delvac1 and changed one engine. Started it and immediately I could see less smoke. Then the water out of the exhaust check, I always do, and I notice less sheen. Took the boat to the Island with only the one changed and I could tell a big difference. Changed the second to Delvac 1 and since that change at least ten other GB owners have done the same. We all experience less smoke and sheen and much less oil consumption.

That was 1998 and I have a 10 yr history with Delvac 1

It is because the sheen is unburned diesel and the synthetic has a much higher lubricity factor and seals the pistons better. You try it.

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