Sparks ILZFR6D11

[enzed4]

This is one of those questions that people will go one way or the other depending on what they believe, or have heard. Very first hit on Google about it was this

NGK does not recommend the application of lubricant such as copper grease to spark plug threads as the result is a reduction of frictional forces at the thread faces. .

This explains exactly why you shouldn't use copper/dielectric grease on spark plug threads:
https://www.driven2automotive.com/b...se-copper-grease-when-installing-spark-plugs/

I'm not saying don't do it, but based on the advice of the people who make spark plugs, I wouldn't...

Have you got ngk’s phone number? I’ll give them a call if an ungreased plug seizes in my cylinder head
Rob

I think it's 0800fu**off
But seriously, they're not saying the grease is the problem as such, it's overtightening of the spark plugs because of the grease preventing the spark plug from stopping at the correct torque.
So if you don't overtighten, no problem... :wink:

 

[Smartbear]

This is one of those questions that people will go one way or the other depending on what they believe, or have heard. Very first hit on Google about it was this

This explains exactly why you shouldn't use copper/dielectric grease on spark plug threads:
https://www.driven2automotive.com/b...se-copper-grease-when-installing-spark-plugs/

I'm not saying don't do it, but based on the advice of the people who make spark plugs, I wouldn't...

Have you got ngk’s phone number? I’ll give them a call if an ungreased plug seizes in my cylinder head
Rob

I think it's 0800fu**off
But seriously, they're not saying the grease is the problem as such, it's overtightening of the spark plugs because of the grease preventing the spark plug from stopping at the correct torque.
So if you don't overtighten, no problem... :wink:

That’s fine, i worked as a mechanic in a previous life and still have a calibrated elbow :lol:
Rob

 

[Jl-c]

I have always used aluminium grease as heads these days are often aluminium ( sorry yanks you can't spell ! ) and have never in 40+ years had an issue with a) removing the plugs or b) had one come loose. As Smartbear says "seized plugs in the cylinder head can be a nightmare to sort out "

 

[Jl-c]

Ignore the name ( it does however stick in your mind, about the only thing it sticks to ) I use this stuff, https://www.ebay.co.uk/p/1705630311?iid=233189780300 does a great job and a tub lasts for years, used sparingly. It was made for push-bikes but works great on anything mechanical wise.

 

[ronk]

That wouldn’t be a biggie, the grease would burn off fast with combustion temperature. A little grease isn’t a bad idea as seized plugs in the cylinder head can be a nightmare to sort out
Rob

Tell me about it?????
Many years ago I had a spark plug snap at the thread u'cut - It was a head off and Heli-Coil job to repair the Aluminium, O/Head cam head.
The head also had been fitted with Wills rings so they also needed to be replaced.
The job cost me a lot of time and money - Particularly bad because I was only doing someone a favour!

A little coating of Copper slip is your friend
Although after reading the article in enzed4's post I might not bother in future!