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#1
posted to rec.boats.cruising
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blue smoke from a Perkins 4-108
We're taking a look at a sailboat with this engine. Upon start up, there's a
fair amount of blue smoke, which disappears after the engine gets a little warm. Also noticed it when you give it fairly high revvs in neutral. I'm thinking value guides or rings? What do you think about that and the cost of repair. It's got about 3200 hours on it, and I don't see any obvious leaks. -- "j" ganz @@ www.sailnow.com |
#2
posted to rec.boats.cruising
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blue smoke from a Perkins 4-108
4-108 that does not leak!!!
Call the national perkins dealer and talk to a tech or the guy that teaches. I will try and findthat # for you. They will also tell you who in your area is a perkins mech. For what it is worth I had blue and black smoke. Ran the **** out of it changed the oil several times, once ran moto-flush thru it. No smoke now and seems to run cooler. However you may want to have real diesel mechanic do a compression test. New fuel may make a difference too. - Allen |
#3
posted to rec.boats.cruising
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blue smoke from a Perkins 4-108
"bushman" wrote in message
news 4-108 that does not leak!!! Call the national perkins dealer and talk to a tech or the guy that teaches. I will try and findthat # for you. They will also tell you who in your area is a perkins mech. For what it is worth I had blue and black smoke. Ran the **** out of it changed the oil several times, once ran moto-flush thru it. No smoke now and seems to run cooler. However you may want to have real diesel mechanic do a compression test. New fuel may make a difference too. - Allen Allen, thanks! I'd appreciate the number. Actually, I said no obvious leaks, but we haven't crawled around that much yet. :-) Jonathan -- "j" ganz @@ www.sailnow.com |
#4
posted to rec.boats.cruising
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blue smoke from a Perkins 4-108
In article ,
"Capt. JG" wrote: We're taking a look at a sailboat with this engine. Upon start up, there's a fair amount of blue smoke, which disappears after the engine gets a little warm. Also noticed it when you give it fairly high revvs in neutral. I'm thinking value guides or rings? What do you think about that and the cost of repair. It's got about 3200 hours on it, and I don't see any obvious leaks. 3200 hours TT (total time) on a 4-108, hardly even Broke IN. You may just have a weepy Injector, or a guide that didn't seat. Compression test should rule out any ring, or topend problems. A little blue smoke is normal untill the engine comes up to Thermistat Temp, and one shouldn't place much stock in what happens to exhaust color unless the engine is loaded. Me |
#5
posted to rec.boats.cruising
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blue smoke from a Perkins 4-108
"Me" wrote in message
... In article , "Capt. JG" wrote: We're taking a look at a sailboat with this engine. Upon start up, there's a fair amount of blue smoke, which disappears after the engine gets a little warm. Also noticed it when you give it fairly high revvs in neutral. I'm thinking value guides or rings? What do you think about that and the cost of repair. It's got about 3200 hours on it, and I don't see any obvious leaks. 3200 hours TT (total time) on a 4-108, hardly even Broke IN. You may just have a weepy Injector, or a guide that didn't seat. Compression test should rule out any ring, or topend problems. A little blue smoke is normal untill the engine comes up to Thermistat Temp, and one shouldn't place much stock in what happens to exhaust color unless the engine is loaded. Me Thanks for the info... I know nothing about these engines. -- "j" ganz @@ www.sailnow.com |
#6
posted to rec.boats.cruising
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blue smoke from a Perkins 4-108
Me wrote in news:Me-6D444D.14425410052006
@netnews.worldnet.att.net: 3200 hours TT (total time) on a 4-108, hardly even Broke IN. You may just have a weepy Injector, or a guide that didn't seat. Compression test should rule out any ring, or topend problems. A little blue smoke is normal untill the engine comes up to Thermistat Temp, and one shouldn't place much stock in what happens to exhaust color unless the engine is loaded. Me I agree. Both the old 4-108 with 9000+ hours on it and the "newsed" 4- 108 with 900 hours on it blue smoke when cold. Cold cylinder walls cause the fuel spray to recondense on them and it burns slowly off like lubeoil. Nothing is wrong with this tractor engine...(c; My captain had a dripless bearing installed with a water injection line that filled the exhaust stack with seawater, along with 3 of the 4 cylinders, hydrolocking the motor. His attempts to restart it this way didn't even phase the engine, although I thought the battery cable was going to jump out of the boat from the current! The engine was pickled at the dock and one injector needed replacement, but after a "few oil changes" she's rarin' ta go! The Perkins is a fantastic engine that will take awful abuse like this. A little blue smoke from a cold Perkins with no preheater running is just normal. Wide open throttle trying to avoid hitting the dock is also exciting. It sounds like she's gonna blow from the knocking and the black smoke pouring up from under the stern will keep the mosquitoes at bay, even in Florida!...(c; I doubt any Yanmar will survive "Perkins abuse". |
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