Tight plug

M

Mort

Senior Member
I changed the plugs on my A when I first got it and the #3 cyl was very tight going in, so tight I did not tighten in all the way (close) in fear of doing something bad. I am now getting some oil coming out around the plug and so plan to remove it, check it and reinstall. It is not stripped just tight. Is there any way to help the situation. Is it better to do it with a warm engine or cold? Put the plug in the freezer and insert it to a warm engine? Suggestions?
Thanks
 
get a thread chaser and run it in the spark plug hole, if you do chase the threads fill the flutes on the chaser with grease to help hold any metal shavings that may be dislogded, plugs should go all the way in with just your fingers
 
I thought about chasing the threads but was afraid of debris in the cylinder, the grease should solve that problem. I took a quick look at Brattons to see if they sell one and could not find it. Do you know what size chaser to use?
Thanks
 
After chasing the threads, use antiseize on ALL plug threads. It's a must on aluminum heads, but it's a good idea for ALL heads.
 
Have you tried screwing one of the old plugs back in??

Take a few steps back and look at the plugs --it will be easier to see if it is crooked and cross threaded.
 
Mort,
You say that you 'changed' the plugs. Did #3 plug (old plug)give you trouble when removing? If not, that should be a clue that you MAY have a defective NEW plug!
I'd try the old plug back into #3 as a test of thread condition now that new plug may have done damage. Always use antiseize grease when installing new or old plugs. This will improve consistent install (torque) effort.
BTW..install effort should consist of use of two fingers on wrench. This will ensure (most times) that you will never over torque/strip good head threads.
 
All the other plugs were fine? To determine if it's the new plug, try installing the plug that was tight in # 1 piston. If it's tight there than it's the plug
 
All plugs were tight in that cylinder and loose in the others. I put in 3X plugs and the #3 hole was not nearly as tight but not able to screw in by hand like the others. I will chase the threads.
Thanks
 
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