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26-05-2016, 12:43
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#16
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cruiser
Join Date: Nov 2005
Location: Vanuatu
Boat: Whiting 29' extended "Nightcap"
Posts: 1,569
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Re: How Do You "Fog" a Diesel Engine
I do it quite regularly. Exclude the oxygen and combustion can't take place, it's simple.
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26-05-2016, 12:56
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#17
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Registered User
Join Date: Aug 2006
Location: Skagit City, WA
Posts: 25,453
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Re: How Do You "Fog" a Diesel Engine
The only way I have tried to fog the diesel is to crank it maybe 1 second, just barely...while spraying. Then repeating. (two people) Good point on the water in the muffler, never thought of that being possibly corrosive.
removing injectors sounds like way to do it good, but a PITA.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard
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26-05-2016, 13:16
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#18
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cruiser
Join Date: Nov 2005
Location: Vanuatu
Boat: Whiting 29' extended "Nightcap"
Posts: 1,569
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Re: How Do You "Fog" a Diesel Engine
If you're not excluding the oxygen then you're doing it wrong.
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26-05-2016, 15:06
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#19
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Registered User
Join Date: Oct 2007
Location: virginia
Boat: islandpacket
Posts: 1,967
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Re: How Do You "Fog" a Diesel Engine
Thats old school. Your missing chemical reaction.
__________________
That derelict boat was another dream for somebody else, don't let it be your nightmare and a waste of your life.
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26-05-2016, 15:10
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#20
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cruiser
Join Date: Nov 2005
Location: Vanuatu
Boat: Whiting 29' extended "Nightcap"
Posts: 1,569
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Re: How Do You "Fog" a Diesel Engine
Not applicable in this case
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27-04-2019, 06:11
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#21
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Registered User
Join Date: Feb 2019
Location: Toronto, Canada
Boat: Lagoon 421
Posts: 2
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Re: How Do You "Fog" a Diesel Engine
I understood that you can spray WD40 in the air intake and that would fog Diesel engine?
Am I wrong.
I'm a newbie and just did my first oil change on my Yanmar engines.
I have the bill from the Marina last year and they charged me for WD40 and 13oz Engine Storage spray?
Any insight or help for a newbie?
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27-04-2019, 06:19
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#22
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Registered User
Join Date: Oct 2007
Location: Lakewood Ranch, FLORIDA
Boat: Alden 50, Sarasota, Florida
Posts: 3,464
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Re: How Do You "Fog" a Diesel Engine
Quote:
Originally Posted by Ladolcevita.eh
I understood that you can spray WD40 in the air intake and that would fog Diesel engine?
Am I wrong.
I'm a newbie and just did my first oil change on my Yanmar engines.
I have the bill from the Marina last year and they charged me for WD40 and 13oz Engine Storage spray?
Any insight or help for a newbie?
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Using WD40 is a feel-good method but serves little purpose. The effective way of preserving any engine is to remove the injectors and go through the injector bores as others have said.
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27-04-2019, 07:42
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#23
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Registered User
Join Date: Aug 2006
Location: Skagit City, WA
Posts: 25,453
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Re: How Do You "Fog" a Diesel Engine
There are better products than WD40, which doesn't last long on most anything. You "fog" the engine as it is shut down and does it's last few rpms. So usually takes two people to do it. I assume this is for long term storage. If you can remove injectors and do that it's great, but often a lot of work. For real long term storage (over a year?) may be worth it. Personally I would cover the intake with a plastic bag also. In the marine environment, ambient air can go through the intake and some valves etc are in the open position, any light rusting on the valve shaft should be avoided or you may end up with a sticking valve etc on start up.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard
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27-04-2019, 15:47
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#24
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Marine Service Provider
Join Date: Sep 2014
Location: Auckland, NZ
Boat: Compass 790 , 7.9 metres or 26 ft
Posts: 2,803
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Re: How Do You "Fog" a Diesel Engine
If you have no decompression levers just loosen injectors, no need to take them right out. If you wanted to do it a hard way you could tighten the tappets down so valves cant seat but don't go so far that they hit the piston!
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27-04-2019, 15:51
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#25
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Marine Service Provider
Join Date: Sep 2014
Location: Auckland, NZ
Boat: Compass 790 , 7.9 metres or 26 ft
Posts: 2,803
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Re: How Do You "Fog" a Diesel Engine
Forgot to add you only need to do it on 1 v/v per cylinder
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