OK here we go again
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Road Warrior
Joined: Nov 2015
Posts: 1,279
Likes: 467
From: anywhere
I give up
I have already striped out one spark plug and it cost me a lot to fix so I dont want to do it again. I just needed a simple answer. I know its 1/4 turn for new plugs but I just needed an answer for used plugs. Is it 1/4 turn or 1/8 turn?
Road Master
Joined: Dec 2022
Posts: 822
Likes: 488
From: LA Ca.
I would have to go and remove one of my plugs and install. I have always gone by feel. I would guess that once the plug is seated, another 1/8 turn should have it tight.
Remember that a loose plug can mess up the threads and make the engine run badly, as a too tight plug can damage the plug and the threads.
Hope this helps,
Tom
Remember that a loose plug can mess up the threads and make the engine run badly, as a too tight plug can damage the plug and the threads.
Hope this helps,
Tom
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Road Warrior
Joined: Nov 2015
Posts: 1,279
Likes: 467
From: anywhere
I have one but I dont know what to torque the plugs to. I have already striped one spark plug out by going 150 inch lbs. or 12.5 ft lbs. as per manual. thats why I need to know if 1/8 of a turn is ok for used plugs. That way I can put my torque wrench on them and see what torque they are.
Seasoned HDF Member
Joined: May 2019
Posts: 5,884
Likes: 11,268
From: NE Ohio
same.
but our friend Gerry has already stripped one
Gerry, I don't know the right way or wrong way, just "my" way that hasn't caused me any troubles yet
so for what it's worth...my calibrated fingers and palm suggests I torque mine (new or used) to roughly 20 ft lbs, car, bike, boat or lawnmower
..L.T.A.
Seasoned HDF Member
Joined: May 2019
Posts: 5,884
Likes: 11,268
From: NE Ohio
WHOA Nellie
something wrong with your torque wrench or you're sure you didn't cross thread the plug?
..L.T.A.
Seasoned HDF Member
Joined: May 2019
Posts: 5,884
Likes: 11,268
From: NE Ohio
I'll note, I had a plug come loose once (don't recall what was, and fortunate it didn't screw up the head threads)
so I tend to snug them up pretty good ever since
I'm sure I'm in the 20 ft lbs or more range
..L.T.A.
so I tend to snug them up pretty good ever since
I'm sure I'm in the 20 ft lbs or more range
..L.T.A.
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Road Master
Joined: Dec 2022
Posts: 822
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From: LA Ca.
https://www.ngk.com/ngk-3932-dcpr7e-nickel-spark-plug
Maybe I'll pull a plug tomorrow and see about what the turn is.
After writing the above and then thinking about what you said..... I think the best option for you is to have a trusted friend or family tighten them for you. You might also just want to put a new plug (or at least replace the gasket ) in every time so that there is no issue on how much to tighten an already crushed gasket.
The only time I tried a torque wrench on a spark plug, I felt I over tightened it. I know the wrench was reading correct.
Tom
Last edited by Tom H; Mar 2, 2024 at 11:14 PM.
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