My old spark plugs, (pic), what does this mean?
Heres a pic of my old spark plug, compared to my new one. What does this mean???
?https://www.rx7club.com/forum/attach...postid=1177185 Also, how tight should i screw on the new ones |
Those really dont look bad at all. Mabe just the slightest bit rich. Nothing to go crazy abou though. The prongs are tan and thats what you want. But i see the electrode is a little sooty and black so thats why its a little rich but not too bad.
CJG |
Re: My old spark plugs, (pic), what does this mean?
Originally posted by ioTus Heres a pic of my old spark plug, compared to my new one. What does this mean??? ?https://www.rx7club.com/forum/attach...postid=1177185 Also, how tight should i screw on the new ones I do my plugs finger tight and about 1 1/2 turns with a wrench, or till just snug. You dont want to over tighten them!! that could be disasterous. |
Yes, they do look just a tad on the hot side. Plugs used in rotaries normally have a little more dark color to them due to the oil injection.
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Use anti-seize on the threads of the plugs before inserting.
From Felix's FAQ, plugs "A Spark Plug Can Destroy a Rotor Housing - Rotor housings are mainly aluminum, while spark plug threads are steel. As a result, the same galling problem found with exhaust fasteners can occur with spark plugs. If one gets stuck, the only solution is overhaul, usually including a new rotor housing. Again, the solution is prevention, anti-sieze compound and correct installation torque, both of which are explicitly stated in Mazda shop manuals. Due to the anti-seize and low recommended installation torque, a torque wrench is not essential, just recommended. If you don't have torque wrench access, use a 3/8" drive "stub" (short-handled) ratchet and simply snug each plug with your thumb and two finger tips." |
Re: My old spark plugs, (pic), what does this mean?
Originally posted by ioTus Heres a pic of my old spark plug, compared to my new one. What does this mean??? ?https://www.rx7club.com/forum/attach...postid=1177185 Also, how tight should i screw on the new ones |
Thats what my old plugs looked like. Pretty normal. Be sure to use anti sieze as inittab says.
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I think the manual says 12 ft/lbs...Or something like that...And as stated, use anti-sieze.
~T.J. |
Your plugs are fine, mine come out like that too.
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Mine looked just like that - I think you're fine. BTW, 84SE, 13B-RE-EGI, and NGK BR8EQ-14's... HTH,
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