Re: Mystery of the low CHT solved


Subject:    Re: Mystery of the low CHT solved
From:    Larry Bowen (larry@bowenaero.com)
Date:    Mon Mar 15 - 10:59 PM
In case you or someone else missed the reference to "let me google that for
you"

See http://lmgtfy.com.  Or in this example:

http://lmgtfy.com/?q=cht+bayonet+probe+adapters

:)

--
Larry Bowen
Larry@BowenAero.com
http://BowenAero.com


On Mon, Mar 15, 2010 at 4:51 PM, Bill Boyd <sportav8r@gmail.com> wrote:

> "Here.  Let me Google that for you..."
>
> Answered my own question with a trip to the GRT website - they sell
> replacement screw-in bayonet probe adapters for 5 bucks.  I'll be good to go
> when the mail runs later this week.
>
> -Stormy
>
> On Mon, Mar 15, 2010 at 11:36 AM, Bill Boyd <sportav8r@gmail.com> wrote:
>
>> Cause of my recent low (190-210*F) CHT's on #4 cylinder, with normal
>> pre-start readings and normal EGT's and power in flight, was just what one
>> might suspect before even pulling the cowl - a faulty sensor; in this case,
>> dangling free of the cylinder head, leaning against the intake manifold
>> tube.
>>
>> What's curious is how the twist and lock spring-loaded connector came
>> loose on this bayonet probe: the tiny spot-welded pin that protrudes
>> radially from the side of stainless barrel that screws into the cylinder
>> head, which the probe cap is slotted to lock upon, fell out of its hole.  I
>> will find out soon if I need to buy a whole new sensor or just the mounting
>> assembly. These probes are 12 years old and have 750 hours on them.  I see
>> no way to anticipate or detect this kind of failure before it happens.
>>  Fortunately, it's not a big safety-of-flight item to suddenly get a low CHT
>> reading if the engine is still making normal power.
>>
>> Off to call GRT and see what's available in the way of spare parts...
>>
>> -Stormy
>>
>> *
>>
>> st" target="_blank">http://www.matronics.com/Navigator?RVSouthEast-List
>> tp://forums.matronics.com
>> _blank">http://www.matronics.com/contribution
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>>
>>
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>
>




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