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  #11  
Old 12-10-2016, 05:51 PM
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GalinHdz GalinHdz is offline
 
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Quote:
Originally Posted by rv6ejguy View Post
Brass is used to help prevent plug seizure, has decent tensile strength, good heat transfer, reasonable cost and good compatibility with the other material here. Not sure how/why a well designed one made of proper material would ever break, especially at the torque values used.
Probably something we need to make sure is done correctly.
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  #12  
Old 12-11-2016, 08:35 AM
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N941WR N941WR is offline
 
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Quote:
Originally Posted by gasman View Post
You should never need to remove the adapters unless you are changing the cyl's.
What? You remove plugs on a regular basis, why not the adapters?

If you follow the directions in the E-mag manual, you will not have an issue with their adapters.

Put anti-seize on both the plug and the adapter. Torque the plug, not the adapter to 18 ft-lbs, and that will set the torque on both.

When it is time to remove the plug, put the socket on the plug only. If the adapter comes out, grab a second socket and spate them. Reinstall them per the instructions.

In nine years of flying with P-mags the only time I have had an issue was when listening to someone who suggested I install them per the LightSpeed manual and torque the insert then install the plugs. I never tried that a second time.

From the E-mag manual:

Quote:
Originally Posted by E-mag Ignitions
Auto Spark Plug Adapters - Plug adapters permit the use of 14mm automotive type plugs with a ¾” reach. [Not tested with engines that use long-reach (13/16”) aircraft plugs.] First, install adapters with the supplied gasket on the spark plugs finger tight. Then, insert the combined assembly (plug with adapter) in the engine and tighten to 18 ft/lb (standard auto plug torque).

Note 1: If you install and torque the adapters separately, stresses will be focused at the adapter neck and can cause it to fail during installation.
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  #13  
Old 12-11-2016, 01:41 PM
gasman gasman is offline
 
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You should never install and torque the adapter by itself. With a thin coat of anti-seize (brush it on with an acid brush. Do not fill the threads) on the adapter and the plug, screw the plug into the adapter. Screw the combination into the head and torque the plug and adapter to 20ft lbs. Then torque the adapter to 35 to 45ft lbs........

The adapter should never come out with the plug. The less you fiddle with the aluminum threads in the head, the less problems you will have with them. The adapter might have failed because it was under torqued for it's size by 20ft lbs. The adapter should be torqued same as the plug it replaced.

Don't attempt to remove the adapter without the plug installed.
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Last edited by gasman : 12-11-2016 at 02:03 PM. Reason: added last line.
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  #14  
Old 12-11-2016, 01:56 PM
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Quote:
Originally Posted by gasman View Post
Then torque the adapter to 35 to 45ft lbs.........
That is contrary to the instructions of the manufacturer (emag air)

Erich
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  #15  
Old 12-11-2016, 02:12 PM
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Quote:
Originally Posted by erich weaver View Post
That is contrary to the instructions of the manufacturer (emag air)
Yes it is.... and they have had far more adapter failures than LSI. These are LSI instructions for torques.
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  #16  
Old 12-11-2016, 07:13 PM
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Quote:
Originally Posted by gasman View Post
Yes it is.... and they have had far more adapter failures than LSI. These are LSI instructions for torques.
Huh. So how many has emag had? LSI? What's the source of your info?
Thanks
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  #17  
Old 12-11-2016, 07:25 PM
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Quote:
Originally Posted by erich weaver View Post
Huh. So how many has emag had? LSI? What's the source of your info?
VAF............ most failed experimental parts show up here.

This is not the first time that this part has been discussed.
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  #18  
Old 12-26-2017, 10:41 AM
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Quote:
Originally Posted by erich weaver View Post
That is contrary to the instructions of the manufacturer (emag air)

Erich
Follow Emag's instructions and torque them together.

Quote:
Originally Posted by Emag 114 Installation Manual
Auto Spark Plug Adapters - Plug adapters permit the use of 14mm automotive type plugs. Use short reach (SR) adapters if your aviation plug callout is M type (for example REMXXXX). Use long reach adapters (LR) if your aviation plug callout is B type (REBXXXX). First, install adapters with the supplied gasket on the spark plugs finger tight. Then, insert the combined assembly (plug with adapter) in the engine and tighten to 18 ft/lb (standard auto plug torque) through the spark plug ONLY. Do not torque the adapter itself.

Note 1: If you install and torque the adapters separately, stresses will be focused at the adapter neck and can cause it to fail during installation.
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  #19  
Old 12-29-2017, 08:24 AM
6 Gun 6 Gun is offline
 
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Cool Adapters

When I bought adapters I went with Roberts because they are Naval Brass and its very close to the same expansion rate as aluminum not sure about other companies.
Bob
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