Today's Message Index:
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1. 01:34 AM - Re: Spark plugs and heat range (rvdave)
2. 06:02 AM - Re: Re: Spark plugs and heat range (Kelly McMullen)
3. 12:18 PM - Re: Spark plugs and heat range (Vol88)
4. 12:29 PM - Re: Re: Spark plugs and heat range (Tim Olson)
5. 12:31 PM - Re: Re: Spark plugs and heat range (Kelly McMullen)
6. 02:00 PM - Re: Spark plugs and heat range (Bob Turner)
Message 1
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| Subject: | Re: Spark plugs and heat range |
Ok thanks for the info, Ill be taking a closer look at this.
--------
Dave Ford
Cadillac, MI
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=496491#496491
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| Subject: | Re: Spark plugs and heat range |
If you don't cut down the air dam in front of the #2 cylinder, it blocks
any direct ram air against the nozzle on #2. You want to preserve as much
of that air dam as possible, to direct as much air as you can to #6 and the
oil cooler, since # 6 is likely to be your hottest cylinder.
I can tell right away that spring is here when my oil temp starts moving
above 180 in cruise.
Sent from my TRS-80 Model 100
On Sun, May 24, 2020 at 9:09 PM rvdave <rv610dave@gmail.com> wrote:
>
> Wondering how critical it is for the =98A=99 to be pointed
=98down=99 since that
> in itself is relative to the slight angle of the injector body. Could it
> be that some injectors are receiving ram pressure instead of atmospheric
> pressure or am I just overthinking this? What did you mean by an air da
m
> that could disturb the air?
>
> --------
> Dave Ford
> Cadillac, MI
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=496489#496489
>
>
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Message 3
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| Subject: | Re: Spark plugs and heat range |
>From Lycoming Service Instruction No. 1275C "Cleaning Fuel Injector Nozzles":
In normally aspirated engines where the nozzles, P/N LW18265 (see Figure 2), are
installed horizontally, particular attention must be paid to the identification
marks stamped on one of the hex flats on the nozzle body. This mark
is located 180 from the air bleed hole and must appear in the lower side of
the nozzle to assure that the airbleed hole is on top in order to reduce fuel
bleeding from this opening just after shutdown. To ensure nozzle is
correctly torqued, tighten the nozzle to 60 in.lbs. torque. Then continue to
tighten until the letter or number stamped on the hex of the nozzle body points
downward.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=496502#496502
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| Subject: | Re: Spark plugs and heat range |
Good clarification. So the bleed hole is opposite of the identification
mark stamp,
thus when we put the mark down, the air bleed is up.
Tim
On 5/25/2020 2:17 PM, Vol88 wrote:
>
> >From Lycoming Service Instruction No. 1275C "Cleaning Fuel Injector Nozzles":
>
> In normally aspirated engines where the nozzles, P/N LW18265 (see Figure 2),
are installed horizontally, particular attention must be paid to the
identification marks stamped on one of the hex flats on the nozzle body. This
mark is located 180 from the air bleed hole and must appear in the lower side
of the nozzle to assure that the airbleed hole is on top in order to reduce fuel
bleeding from this opening just after shutdown. To ensure nozzle is
correctly torqued, tighten the nozzle to 60 in.lbs. torque. Then continue to
tighten until the letter or number stamped on the hex of the nozzle body points
downward.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=496502#496502
>
>
Message 5
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| Subject: | Re: Spark plugs and heat range |
I would exercise extreme care, because over-tightened nozzles are a bear to
remove, and some experts believe can lead to head cracking in that area.
AirFlow performance gives a spec of 40 in/lbs to no tighter tan 60 in/lbs.
You sure don't want to bugger one up by over-tightening.
Sent from my TRS-80 Model 100
On Mon, May 25, 2020 at 12:22 PM Vol88 <tom@twmason.com> wrote:
>
> >From Lycoming Service Instruction No. 1275C "Cleaning Fuel Injector
> Nozzles":
>
> In normally aspirated engines where the nozzles, P/N LW=C2=AD18265 (see F
igure
> 2), are installed horizontally, particular attention must be paid
> to the identification marks stamped on one of the hex flats on the nozzl
e
> body. This mark is located 180=C2=B0 from the air bleed hole and must app
ear in
> the lower side of the nozzle to assure that the air=C2=ADbleed hole is on
top in
> order to reduce fuel bleeding from this opening just after shutdown.
> To ensure nozzle is correctly torqued, tighten the nozzle to 60
> in.=C2=ADlbs. torque. Then continue to tighten until the letter or number
> stamped on the hex of the nozzle body points downward.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=496502#496502
>
>
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Message 6
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| Subject: | Re: Spark plugs and heat range |
Thank you, Vol88, for reminding me of the actual instructions. Note the arrow doesn't
have to point exactly down: anywhere within a 180 deg of arc of "not up"
will suffice to minimize fuel dripping out after shutdown. If you're concerned
with ram air hitting the opening, you could point the arrow down and slightly
forward.
Like Kelly, I didn't want to over torque these things. I stopped at 40 in-lbs if
the arrow was down. If necessary I went to 60. If that didn't work, I removed
the whole thing, cleaned the treads with a toothbrush and tried again. That
usually worked!
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=496508#496508
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