Jabiru repairs

[BrendAn]

A friend repaired my exhaust and I refitted it today. Looks good, sounds better.

[BrendAn]

Then I thought I would pull the plugs and do a compression check.

First plug I turned snapped off. 

After cursing my stupidity I put the leads back on and ran the engine to warm it up. Got the rest of the plugs out with a bit of finesse and CRC.

I removed the head with the damaged plug and ran it over to southern aviation services at sale.

We are so lucky to have this business in our area. Dave the owner is always ready to help. 

He got the plug out after a battle with it. He found something baked on the thread which glued the plugs in.  

Wrong anti seize is a possibility .

 

[Blueadventures]

I believe they want spark plug threads cleaned using a plastic / nylon brush and a solvent and installed with an application of Copper-max anti-seize compound to the threads.  

 

Maybe yours spark plug was cleaned with a wire or brass brush that has resulted in a corrosive binding reaction? (Just a guess)

 

Nice its sorted and your operational in quick time.

[BrendAn]

9 minutes ago, Blueadventures said:

I believe they want spark plug threads cleaned using a plastic / nylon brush and a solvent and installed with an application of Copper-max anti-seize compound to the threads.  

 

Maybe yours spark plug was cleaned with a wire or brass brush that has resulted in a corrosive binding reaction? (Just a guess)

 

Nice its sorted and your operational in quick time.

thanks mike.  i got told to use hi temp nickel antiseize.  the manual says to coat the head bolts with copper antiseize . i guess that is what you are talking about.  is copper max a brand or a specification. would repco sell it.  i would prefer to just buy the copper stuff for both jobs.

Edited 7 hours ago by BrendAn

[Blueadventures]

11 minutes ago, BrendAn said:

thanks mike.  i got told to use hi temp nickel antiseize.  the manual says to coat the head bolts with copper antiseize . i guess that is what you are talking about.  is copper max a brand or a specification. would repco sell it.  i would prefer to just buy the copper stuff for both jobs.

Download their maintenance and service manual (JEM0004) it'll list the coating types and the anti seize for the spark plugs - they do want what I posted on the spark plug threads now.

Edited 7 hours ago by Blueadventures

[BrendAn]

8 minutes ago, Blueadventures said:

Download their maintenance and service manual (JEM0004) it'll list the coating types and the anti seize for the spark plugs - they do want what I posted on the spark plug threads now.

just realised i am reading jem0002. earlier version.

hows this for confusing. the list of sealants and lubricants recommends nickel for the head bolts then you go to the maintenance section and they recommend copper for the head bolts.🙂

 

loctite Nickel Anti-Seize is copper free. Recommended for stainless steel and other metal fittings. For preventing corrosion, seizing, and galling in harsh, chemical environments, and temperatures to 2400 °F (1315 °C). Used on cylinder head screws.

 

If the engine has been operating in a corrosive environment (such as coastal areas) it is possible for the cylinder head screws to rust in place. In this scenario it may be necessary to periodically removed screw one at a time (do not remove all at once), check for rust (substantially corroded screws must be replaced), and apply copper anti-seize before reinstalling to the torque setting.

Edited 7 hours ago by BrendAn

[BrendAn]

14 minutes ago, Blueadventures said:

Download their maintenance and service manual (JEM0004) it'll list the coating types and the anti seize for the spark plugs - they do want what I posted on the spark plug threads now.

no argument here. i will buy it in the morning.  

[BrendAn]

loctite C5-A • Copper based anti-seize lubricant • Used on threaded connections prone to corrosion seizure such as spark plugs, cylinder head bolts and pipe retaining capscrews • Production Manual reference – ‘Copper-max’ or ‘Anti Seize Lubricant’

 

found it. repco should have it

Edited 7 hours ago by BrendAn

[Blueadventures]

6 minutes ago, BrendAn said:

no argument here. i will buy it in the morning.  

All good, many stuff will work, only passing on what I know.  Cheers.