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| Hair Dryer as "preheater" to Help Sta... |
| Author |
Message |
    
Paul Brogger
Member
Username: broggerp
Post Number: 7
Registered: 10-2007
| | Posted on Tuesday, October 23, 2007 - 01:06 pm: | 
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My two-cylinder Yanmar has apparently got poor compression, and takes its own sweet time to start -- worse in cold weather. I understand the starting fluid (ether) approach is not a great idea, and I don't have any glow plugs. But I figured pre-heating the air at the air cleaner ("silencer") ought to help, and it sure does! I used my heat gun (set to low) and the thing starts with a few turns, rather than only after 30+ seconds of grinding.
So, the question is, am I doing something horrible? I know I'm only treating a symptom, and that the compression needs to be fixed someday. But am I making anything dramatically worse by starting the engine with heated air? (I'm certainly avoiding battery drain, starter over-work, and possibly backing up cooling water into the exhaust manifold.) |
Eddie from Oregon
Visitor
| | Posted on Thursday, October 25, 2007 - 10:19 am: |
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No, it's not horrible. A hair drier is a tried and true method for helping an old diesel start better. The effect of the high compression in a diesel engine is to multiple the heat energy of the availiable air. If the availiable air is higher to begin with (via the hair drier) that increase in availiable air temperature will be muliplied by compression.
Another trick is to crank a few times to get some fuel into the cylinders. You then wait a couple of minutes then crank again. The idea is to get the fuel from the initial cranking to run down the cyliner walls to the rings to help the rings create a better seal and get more compression.
Another trick is to put a rag soaked with WD-40 over the air intake. The WD-40 is more volitile than regular fuel and kicks off easier. |
Dennis Kearns
Visitor
| | Posted on Sunday, November 04, 2007 - 01:52 pm: |
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Another easy fix is put a 60 watt light bulb under the hood at night so the engine will be warm in the morning. A plastic work light is perfect for this. |
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