[AT] oil change

JTakemoto at wildblue.net JTakemoto at wildblue.net
Fri Dec 7 19:28:40 PST 2007


Ralph you are half right it it moisture in the air and the speed of the
air going though the carb. On my car if i kept it at slower speed till the
engine warmed up it would not ice up.
J.

>
> ----- Original Message -----
> From: <JTakemoto at wildblue.net>
> To: "Antique tractor email discussion group"
> <at at lists.antique-tractor.com>
> Sent: Friday, December 07, 2007 1:12 AM
> Subject: Re: [AT] oil change
>
>
>>
>> Funny wind chill can cause ice in a Carburetor on a fairly warm morning
>> 40
>> to 45 deg.
>> J.
> Actually it is the humidity (moisture) in the air that causes carburetor
> or
> intake icing. That moisture-laden air rushing through the carb and intake
> will turn to ice until the engine heats up enough to melt it. Surprisingly
> we can have just as severe carb icing problems at 40 above as at 30 below
> as
> it is usually very low humidity conditions at -30. A cool summer morning
> at
> even 60 degrees can still cause ice buildup on the intake manifold of
> older
> tractors (and my IH truck) when the humidity is high. I've seen it happen
> many times. The easy cure? Just shut off the engine for a few minutes to
> let
> the heat from the engine warm the manifold enough to melt the ice. After
> that it is good for the rest of the day. Thats the reason the newer (70s
> and
> up) engines had a hot air "stove" on the exhaust manifold to warm the
> incoming air and prevent this icing problem. Vehicles anyway. I've never
> owned a gas powered tractor new enough to have a "stove"
>
> Ralph in Sask.
>
>
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